DocumentationVersion comparison
POSTGRESQL · VERSION COMPARE
Compare PostgreSQL major or minor versions to explore new features, bug fixes, and CVE security records.
Includes changes after the source version through the target. A major version name means its initial release.
From PostgreSQL 9.0 onward: 17 major branches and 352 release notes. Updated 2026-09-26.
Minor update
2019-10-03 2024-11-21
12.0 HistoricalSupport ends 2024-11-21
12.22 HistoricalSupport ends 2024-11-21
| CVE / issue | Severity | Fixed version |
|---|---|---|
| CVE-2024-7348 Prevent unauthorized code execution during pg_dump Fixed in target | 8.8High | 12.20 |
| CVE-2024-10979 Prevent trusted PL/Perl code from changing environment variables Fixed in target | 8.8High | 12.21 |
| CVE-2023-5869 Detect integer overflow while computing new array dimensions Fixed in target | 8.8High | 12.17 |
| CVE-2022-1552 Confine additional operations within “security restricted operation” sandboxes Fixed in target | 8.8High | 12.11 |
| CVE-2020-25695 Block DECLARE CURSOR ... WITH HOLD and firing of deferred triggers within index expressions and materialized view queries Fixed in target | 8.8High | 12.5 |
| CVE-2019-3466 pg_ctlcluster script in postgresql-common does not drop privileges when creating socket/statistics temporary directories Fixed in target | 8.4High | 12.1 |
| CVE-2021-23214 Make the server reject extraneous data after an SSL or GSS encryption handshake Fixed in target | 8.1High | 12.9 |
| CVE-2020-25694 Fix usage of complex connection-string parameters in pg_dump, pg_restore, clusterdb, reindexdb, and vacuumdb Fixed in target | 8.1High | 12.5 |
| CVE-2024-0985 Tighten security restrictions within REFRESH MATERIALIZED VIEW CONCURRENTLY Fixed in target | 8.0High | 12.18 |
| CVE-2023-39417 Disallow substituting a schema or owner name into an extension script if the name contains a quote, backslash, or dollar sign Fixed in target | 7.5High | 12.16 |
| CVE-2020-25696 Prevent psql's \gset command from modifying specially-treated variables Fixed in target | 7.5High | 12.5 |
| CVE-2020-14349 Set a secure search_path in logical replication walsenders and apply workers Fixed in target | 7.5High | 12.4 |
| CVE-2023-2454 Prevent CREATE SCHEMA from defeating changes in search_path Fixed in target | 7.2High | 12.15 |
| CVE-2022-2625 Do not let extension scripts replace objects not already belonging to the extension Fixed in target | 7.1High | 12.12 |
| CVE-2020-14350 Make contrib modules' installation scripts more secure Fixed in target | 7.1High | 12.4 |
| CVE-2020-10733 Windows installer runs executables from uncontrolled directories Fixed in target | 6.7Medium | 12.3 |
| CVE-2021-3677 Fix mis-planning of repeated application of a projection step Fixed in target | 6.5Medium | 12.8 |
| CVE-2021-32029 Fix possibly-incorrect computation of UPDATE ... RETURNING outputs for joined cross-partition updates Fixed in target | 6.5Medium | 12.7 |
| CVE-2021-32028 Fix mishandling of “junk” columns in INSERT ... ON CONFLICT ... UPDATE target lists Fixed in target | 6.5Medium | 12.7 |
| CVE-2021-32027 Prevent integer overflows in array subscripting calculations Fixed in target | 6.5Medium | 12.7 |
| CVE-2023-5868 Fix handling of unknown-type arguments in DISTINCT "any" aggregate functions Fixed in target | 4.3Medium | 12.17 |
| CVE-2024-10978 Fix unintended interactions between SET SESSION AUTHORIZATION and SET ROLE Fixed in target | 4.2Medium | 12.21 |
| CVE-2024-10976 Ensure cached plans are marked as dependent on the calling role when RLS applies to a non-top-level table reference Fixed in target | 4.2Medium | 12.21 |
| CVE-2023-2455 Enforce row-level security policies correctly after inlining a set-returning function Fixed in target | 4.2Medium | 12.15 |
| CVE-2022-41862 libpq can leak memory contents after GSSAPI transport encryption initiation fails Fixed in target | 3.7Low | 12.14 |
| CVE-2021-23222 Make libpq reject extraneous data after an SSL or GSS encryption handshake Fixed in target | 3.7Low | 12.9 |
| CVE-2024-10977 Make libpq discard error messages received during SSL or GSS protocol negotiation Fixed in target | 3.1Low | 12.21 |
| CVE-2021-3393 Fix information leakage in constraint-violation error messages Fixed in target | 3.1Low | 12.6 |
| CVE-2020-1720 Add missing permissions checks for ALTER ... DEPENDS ON EXTENSION Fixed in target | 3.1Low | 12.2 |
| CVE-2023-5870 Prevent the pg_signal_backend role from signalling background workers and autovacuum processes Fixed in target | 2.2Low | 12.17 |
| CVE / issue | Severity | Fixed version |
|---|---|---|
| CVE-2026-6637 PostgreSQL refint allows stack buffer overflow and SQL injection | 8.8High | Not available for this branch |
| CVE-2026-6477 PostgreSQL libpq lo_* functions let server superuser overwrite client stack memory | 8.8High | Not available for this branch |
| CVE-2026-6475 PostgreSQL pg_basebackup and pg_rewind can overwrite unrelated files of origin superuser choice | 8.8High | Not available for this branch |
| CVE-2026-6473 PostgreSQL server undersizes allocations, via integer wraparound | 8.8High | Not available for this branch |
| CVE-2026-2006 PostgreSQL missing validation of multibyte character length executes arbitrary code | 8.8High | Not available for this branch |
| CVE-2026-2005 PostgreSQL pgcrypto heap buffer overflow executes arbitrary code | 8.8High | Not available for this branch |
| CVE-2026-2004 PostgreSQL intarray missing validation of type of input to selectivity estimator executes arbitrary code | 8.8High | Not available for this branch |
| CVE-2026-19385 PostgreSQL pg_dump heap buffer overflow executes arbitrary code | 8.8High | Not available for this branch |
| CVE-2026-18408 PostgreSQL psql \unrestrict lets superuser of pg_dump origin server execute arbitrary code in psql client | 8.8High | Not available for this branch |
| CVE-2026-16239 PostgreSQL type confusion in cursor CLOSE + DECLARE executes arbitrary code | 8.8High | Not available for this branch |
| CVE-2026-15742 PostgreSQL fuzzystrmatch writes effectively-arbitrary addresses, via integer wraparound | 8.8High | Not available for this branch |
| CVE-2026-15741 PostgreSQL expression deparse allows SQL injection via EXTRACT argument | 8.8High | Not available for this branch |
| CVE-2026-14680 PostgreSQL type confusion via "internal" arguments | 8.8High | Not available for this branch |
| CVE-2026-14677 PostgreSQL 32-bit pltcl and plperl undersize allocations, via integer wraparound | 8.8High | Not available for this branch |
| CVE-2026-14671 PostgreSQL refint plan cache type confusion executes arbitrary code | 8.8High | Not available for this branch |
| CVE-2026-14670 PostgreSQL plperl tied object heap buffer overflow executes arbitrary code | 8.8High | Not available for this branch |
| CVE-2026-14669 PostgreSQL to_char heap buffer overflow executes arbitrary code | 8.8High | Not available for this branch |
| CVE-2026-14664 PostgreSQL regexp heap buffer overflow executes arbitrary code | 8.8High | Not available for this branch |
| CVE-2026-14662 PostgreSQL tsvector and tsquery undersize allocations, via integer wraparound | 8.8High | Not available for this branch |
| CVE-2025-8715 PostgreSQL pg_dump newline in object name executes arbitrary code in psql client and in restore target server | 8.8High | Not available for this branch |
| CVE-2025-8714 PostgreSQL pg_dump lets superuser of origin server execute arbitrary code in psql client | 8.8High | Not available for this branch |
| CVE-2026-14679 PostgreSQL stack buffer overflow in argument match writes 0x0 and 0x1 to server memory | 8.2High | Not available for this branch |
| CVE-2026-6464 PostgreSQL psql COPY FROM STDIN early failure processes data lines as psql commands | 8.1High | Not available for this branch |
| CVE-2026-14668 PostgreSQL ctid type confusion in selectivity estimator discloses derivative of arbitrary read | 8.1High | Not available for this branch |
| CVE-2025-1094 PostgreSQL quoting APIs miss neutralizing quoting syntax in text that fails encoding validation | 8.1High | Not available for this branch |
| CVE-2026-6479 PostgreSQL SSL/GSS init causes denial of service, via uncontrolled recursion | 7.5High | Not available for this branch |
| CVE-2026-6471 PostgreSQL logical decoding can dlopen arbitrary file | 7.2High | Not available for this branch |
| CVE-2026-6478 PostgreSQL discloses MD5-hashed passwords via covert timing channel | 6.5Medium | Not available for this branch |
| CVE-2026-14663 PostgreSQL pgcrypto, for OpenSSL-disabled ciphers, silently encrypts to and decrypts from cleartext | 6.5Medium | Not available for this branch |
| CVE-2025-4207 PostgreSQL GB18030 encoding validation can read one byte past end of allocation for text that fails validation | 5.9Medium | Not available for this branch |
| CVE-2025-12818 PostgreSQL libpq undersizes allocations, via integer wraparound | 5.9Medium | Not available for this branch |
| CVE-2026-6472 PostgreSQL CREATE TYPE does not check multirange schema CREATE privilege | 5.4Medium | Not available for this branch |
| CVE-2026-6474 PostgreSQL timeofday() can disclose portions of server memory | 4.3Medium | Not available for this branch |
| CVE-2026-6470 PostgreSQL fails to check type USAGE privilege | 4.3Medium | Not available for this branch |
| CVE-2026-2003 PostgreSQL oidvector discloses a few bytes of memory | 4.3Medium | Not available for this branch |
| CVE-2026-18024 PostgreSQL ascii() function reads past end of buffer | 4.3Medium | Not available for this branch |
| CVE-2026-14678 PostgreSQL pg_trgm picksplit reads past end of buffer | 4.3Medium | Not available for this branch |
| CVE-2026-14666 PostgreSQL row security caching disregards role modifications | 4.2Medium | Not available for this branch |
| CVE-2026-6469 PostgreSQL ALTER TABLE ALTER TYPE resets extended statistics ownership | 3.8Low | Not available for this branch |
| CVE-2026-16241 PostgreSQL ECPG integer underflow can crash the client | 3.8Low | Not available for this branch |
| CVE-2026-14673 PostgreSQL amcheck does not clear untrusted search path | 3.8Low | Not available for this branch |
| CVE-2025-8713 PostgreSQL optimizer statistics can expose sampled data within a view, partition, or child table | 3.1Low | Not available for this branch |
| CVE-2025-12817 PostgreSQL CREATE STATISTICS does not check for schema CREATE privilege | 3.1Low | Not available for this branch |
A dump/restore is not required for those running 12.X.
However, if you are upgrading from a version earlier than 12.18, see Section E.5.
Changes
Restore functionality of ALTER {ROLE|DATABASE} SET role (Tom Lane, Noah Misch) §
The fix for CVE-2024-10978 accidentally caused settings for role to not be applied if they come from non-interactive sources, including previous ALTER {ROLE|DATABASE} commands and the PGOPTIONS environment variable.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
A dump/restore is not required for those running 12.X.
However, if you are upgrading from a version earlier than 12.18, see Section E.5.
Changes
Ensure cached plans are marked as dependent on the calling role when RLS applies to a non-top-level table reference (Nathan Bossart) §
If a CTE, subquery, sublink, security invoker view, or coercion projection in a query references a table with row-level security policies, we neglected to mark the resulting plan as potentially dependent on which role is executing it. This could lead to later query executions in the same session using the wrong plan, and then returning or hiding rows that should have been hidden or returned instead.
The PostgreSQL Project thanks Wolfgang Walther for reporting this problem. (CVE-2024-10976)
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Make libpq discard error messages received during SSL or GSS protocol negotiation (Jacob Champion) §
An error message received before encryption negotiation is completed might have been injected by a man-in-the-middle, rather than being real server output. Reporting it opens the door to various security hazards; for example, the message might spoof a query result that a careless user could mistake for correct output. The best answer seems to be to discard such data and rely only on libpq's own report of the connection failure.
The PostgreSQL Project thanks Jacob Champion for reporting this problem. (CVE-2024-10977)
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix unintended interactions between SET SESSION AUTHORIZATION and SET ROLE (Tom Lane) § §
The SQL standard mandates that SET SESSION AUTHORIZATION have a side-effect of doing SET ROLE NONE. Our implementation of that was flawed, creating more interaction between the two settings than intended. Notably, rolling back a transaction that had done SET SESSION AUTHORIZATION would revert ROLE to NONE even if that had not been the previous state, so that the effective user ID might now be different from what it had been before the transaction. Transiently setting session_authorization in a function SET clause had a similar effect. A related bug was that if a parallel worker inspected current_setting('role'), it saw none even when it should see something else.
The PostgreSQL Project thanks Tom Lane for reporting this problem. (CVE-2024-10978)
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Prevent trusted PL/Perl code from changing environment variables (Andrew Dunstan, Noah Misch) § § § §
The ability to manipulate process environment variables such as PATH gives an attacker opportunities to execute arbitrary code. Therefore, “trusted” PLs must not offer the ability to do that. To fix plperl, replace %ENV with a tied hash that rejects any modification attempt with a warning. Untrusted plperlu retains the ability to change the environment.
The PostgreSQL Project thanks Coby Abrams for reporting this problem. (CVE-2024-10979)
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Disallow ALTER TABLE ATTACH PARTITION if the table to be attached has a foreign key referencing the partitioned table (Álvaro Herrera) § §
This arrangement is not supported, and other ways of creating it already fail.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Don't use partitionwise joins or grouping if the query's collation for the key column doesn't match the partition key's collation (Jian He, Webbo Han) § §
Such plans could produce incorrect results.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Allow cancellation of the second stage of index build for large hash indexes (Pavel Borisov) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix assertion failure or confusing error message for COPY (, when the query) TO ...query is rewritten by a DO INSTEAD NOTIFY rule (Tender Wang, Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix detection of skewed data during parallel hash join (Thomas Munro) §
After repartitioning the inner side of a hash join because one partition has accumulated too many tuples, we check to see if all the partition's tuples went into the same child partition, which suggests that they all have the same hash value and further repartitioning cannot improve matters. This check malfunctioned in some cases, allowing repeated futile repartitioning which would eventually end in a resource-exhaustion error.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix race condition in committing a serializable transaction (Heikki Linnakangas) §
Mis-processing of a recently committed transaction could lead to an assertion failure or a “could not access status of transaction” error.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix race condition in COMMIT PREPARED that resulted in orphaned 2PC files (wuchengwen) §
A concurrent PREPARE TRANSACTION could cause COMMIT PREPARED to not remove the on-disk two-phase state file for the completed transaction. There was no immediate ill effect, but a subsequent crash-and-recovery could fail with “could not access status of transaction”, requiring manual removal of the orphaned file to restore service.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid invalid memory accesses after skipping an invalid toast index during VACUUM FULL (Tender Wang) §
A list tracking yet-to-be-rebuilt indexes was not properly updated in this code path, risking assertion failures or crashes later on.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix ways in which an “in place” catalog update could be lost (Noah Misch) § § § § § § §
Normal row updates write a new version of the row to preserve rollback-ability of the transaction. However, certain system catalog updates are intentionally non-transactional and are done with an in-place update of the row. These patches fix race conditions that could cause the effects of an in-place update to be lost. As an example, it was possible to forget having set pg_class.relhasindex to true, preventing updates of the new index and thus causing index corruption.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Reset catalog caches at end of recovery (Noah Misch) §
This prevents scenarios wherein an in-place catalog update could be lost due to using stale data from a catalog cache.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid using parallel query while holding off interrupts (Francesco Degrassi, Noah Misch, Tom Lane) § §
This situation cannot arise normally, but it can be reached with test scenarios such as using a SQL-language function as B-tree support (which would be far too slow for production usage). If it did occur it would result in an indefinite wait.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Guard against stack overflow in libxml2 with too-deeply-nested XML input (Tom Lane, with hat tip to Nick Wellnhofer) §
Use xmlXPathCtxtCompile() rather than xmlXPathCompile(), because the latter fails to protect itself against recursion-to-stack-overflow in libxml2 releases before 2.13.4.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix “failed to find plan for subquery/CTE” errors in EXPLAIN (Richard Guo, Tom Lane) §
This case arose while trying to print references to fields of a RECORD-type output of a subquery when the subquery has been optimized out of the plan altogether (which is possible at least in the case that it has a constant-false WHERE condition). Nothing remains in the plan to identify the original field names, so fall back to printing f for the NN'th record column. (That's actually the right thing anyway, if the record output arose from a ROW() constructor.)
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Disallow a USING clause when altering the type of a generated column (Peter Eisentraut) §
A generated column already has an expression specifying the column contents, so including USING doesn't make sense.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ignore not-yet-defined Portals in the pg_cursors view (Tom Lane) §
It is possible for user-defined code that inspects this view to be called while a new cursor is being set up, and if that happens a null pointer dereference would ensue. Avoid the problem by defining the view to exclude incompletely-set-up cursors.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Reduce memory consumption of logical decoding (Masahiko Sawada) §
Use a smaller default block size to store tuple data received during logical replication. This reduces memory wastage, which has been reported to be severe while processing long-running transactions, even leading to out-of-memory failures.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Re-disable sending of stateless (TLSv1.2) session tickets (Daniel Gustafsson) §
A previous change to prevent sending of stateful (TLSv1.3) session tickets accidentally re-enabled sending of stateless ones. Thus, while we intended to prevent clients from thinking that TLS session resumption is supported, some still did.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid “wrong tuple length” failure when dropping a database with many ACL (permission) entries (Ayush Tiwari) § §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Allow adjusting the session_authorization and role settings in parallel workers (Tom Lane) §
Our code intends to allow modifiable server settings to be set by function SET clauses, but not otherwise within a parallel worker. SET clauses failed for these two settings, though.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix behavior of stable functions called from a CALL statement's argument list, when the CALL is within a PL/pgSQL EXCEPTION block (Tom Lane) §
As with a similar fix in our previous quarterly releases, this case allowed such functions to be passed the wrong snapshot, causing them to see stale values of rows modified since the start of the outer transaction.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Parse libpq's keepalives connection option in the same way as other integer-valued options (Yuto Sasaki) §
The coding used here rejected trailing whitespace in the option value, unlike other cases. This turns out to be problematic in ecpg's usage, for example.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
In ecpglib, fix out-of-bounds read when parsing incorrect datetime input (Bruce Momjian, Pavel Nekrasov) §
It was possible to try to read the location just before the start of a constant array. Real-world consequences seem minimal, though.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Include the source timeline history in pg_rewind's debug output (Heikki Linnakangas) §
This was the intention to begin with, but a coding error caused the source history to always print as empty.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid trying to reindex temporary tables and indexes in vacuumdb and in parallel reindexdb (VaibhaveS, Michael Paquier, Fujii Masao, Nathan Bossart) § §
Reindexing other sessions' temporary tables cannot work, but the check to skip them was missing in some code paths, leading to unwanted failures.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Allow inspection of sequence relations in relevant functions of contrib/pageinspect and contrib/pgstattuple (Nathan Bossart, Ayush Vatsa) § §
This had been allowed in the past, but it got broken during the introduction of non-default access methods for tables.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix incorrect LLVM-generated code on ARM64 platforms (Thomas Munro, Anthonin Bonnefoy) §
When using JIT compilation on ARM platforms, the generated code could not support relocation distances exceeding 32 bits, allowing unlucky placement of generated code to cause server crashes on large-memory systems.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix a few places that assumed that process start time (represented as a time_t) will fit into a long value (Max Johnson, Nathan Bossart) §
On platforms where long is 32 bits (notably Windows), this coding would fail after Y2038. Most of the failures appear only cosmetic, but notably pg_ctl start would hang.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Prevent “nothing provides perl(PostgreSQL::Test::Utils)” failures while building RPM packages of PostgreSQL (Noah Misch) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix building with Strawberry Perl on Windows (Andrew Dunstan) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Update time zone data files to tzdata release 2024b (Tom Lane) § §
This tzdata release changes the old System-V-compatibility zone names to duplicate the corresponding geographic zones; for example PST8PDT is now an alias for America/Los_Angeles. The main visible consequence is that for timestamps before the introduction of standardized time zones, the zone is considered to represent local mean solar time for the named location. For example, in PST8PDT, timestamptz input such as 1801-01-01 00:00 would previously have been rendered as 1801-01-01 00:00:00-08, but now it is rendered as 1801-01-01 00:00:00-07:52:58.
Also, historical corrections for Mexico, Mongolia, and Portugal. Notably, Asia/Choibalsan is now an alias for Asia/Ulaanbaatar rather than being a separate zone, mainly because the differences between those zones were found to be based on untrustworthy data.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
A dump/restore is not required for those running 12.X.
However, if you are upgrading from a version earlier than 12.18, see Section E.5.
Changes
Prevent unauthorized code execution during pg_dump (Masahiko Sawada) §
An attacker able to create and drop non-temporary objects could inject SQL code that would be executed by a concurrent pg_dump session with the privileges of the role running pg_dump (which is often a superuser). The attack involves replacing a sequence or similar object with a view or foreign table that will execute malicious code. To prevent this, introduce a new server parameter restrict_nonsystem_relation_kind that can disable expansion of non-builtin views as well as access to foreign tables, and teach pg_dump to set it when available. Note that the attack is prevented only if both pg_dump and the server it is dumping from are new enough to have this fix.
The PostgreSQL Project thanks Noah Misch for reporting this problem. (CVE-2024-7348)
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix failure after attaching a table as a partition, if the table had previously had inheritance children (Álvaro Herrera) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix ALTER TABLE DETACH PARTITION for cases involving inconsistent index-based constraints (Álvaro Herrera, Tender Wang) § §
When a partitioned table has an index that is not associated with a constraint, but a partition has an equivalent index that is, then detaching the partition would misbehave, leaving the ex-partition's constraint with an incorrect coninhcount value. This would cause trouble during any further manipulations of that constraint.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix handling of polymorphic output arguments for procedures (Tom Lane) § §
The SQL CALL statement did not resolve the correct data types for such arguments, leading to errors such as “cannot display a value of type anyelement”, or even outright crashes. (But CALL in PL/pgSQL worked correctly.)
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix behavior of stable functions called from a CALL statement's argument list (Tom Lane) §
If the CALL is within an atomic context (e.g. there's an outer transaction block), such functions were passed the wrong snapshot, causing them to see stale values of rows modified since the start of the outer transaction.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Detect integer overflow in money calculations (Joseph Koshakow) §
None of the arithmetic functions for the money type checked for overflow before, so they would silently give wrong answers for overflowing cases.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix over-aggressive clamping of the scale argument in round(numeric) and trunc(numeric) (Dean Rasheed) §
These functions clamped their scale argument to +/-2000, but there are valid use-cases for it to be larger; the functions returned incorrect results in such cases. Instead clamp to the actual allowed range of type numeric.
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Changes
Prevent pg_sequence_last_value() from failing on unlogged sequences on standby servers and on temporary sequences of other sessions (Nathan Bossart) §
Make it return NULL in these cases instead of throwing an error.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix parsing of ignored operators in websearch_to_tsquery() (Tom Lane) §
Per the manual, punctuation in the input of websearch_to_tsquery() is ignored except for the special cases of dashes and quotes. However, parentheses and a few other characters appearing immediately before an or could cause or to be treated as a data word, rather than as an OR operator as expected.
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Changes
Detect another integer overflow case while computing new array dimensions (Joseph Koshakow) §
Reject applying array dimensions [-2147483648:2147483647] to an empty array. This is closely related to CVE-2023-5869, but appears harmless since the array still ends up empty.
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Changes
Detect another case of a new catalog cache entry becoming stale while detoasting its fields (Noah Misch) §
An in-place update occurring while we expand out-of-line fields in a catalog tuple could be missed, leading to a catalog cache entry that lacks the in-place change but is not known to be stale. This is only possible in the pg_database catalog, so the effects are narrow, but misbehavior is possible.
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Changes
Correctly check updatability of view columns targeted by INSERT ... DEFAULT (Tom Lane) §
If such a column is non-updatable, we should give an error reporting that. But the check was missed and then later code would report an unhelpful error such as “attribute number N not found in view targetlist”.
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Changes
Avoid reporting an unhelpful internal error for incorrect recursive queries (Tom Lane) §
Rearrange the order of error checks so that we throw an on-point error when a WITH RECURSIVE query does not have a self-reference within the second arm of the UNION, but does have one self-reference in some other place such as ORDER BY.
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Changes
Don't throw an error if a queued AFTER trigger no longer exists (Tom Lane) §
It's possible for a transaction to execute an operation that queues a deferred AFTER trigger for later execution, and then to drop the trigger before that happens. Formerly this led to weird errors such as “could not find trigger NNNN”. It seems better to silently do nothing if the trigger no longer exists at the time when it would have been executed.
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Changes
Fix failure to remove pg_init_privs entries for column-level privileges when their table is dropped (Tom Lane) §
If an extension grants some column-level privileges on a table it creates, relevant catalog entries would remain behind after the extension is dropped. This was harmless until/unless the table's OID was re-used for another relation, when it could interfere with what pg_dump dumps for that relation.
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Changes
Fix selection of an arbiter index for ON CONFLICT when the desired index has expressions or predicates (Tom Lane) §
If a query using ON CONFLICT accesses the target table through an updatable view, it could fail with “there is no unique or exclusion constraint matching the ON CONFLICT specification”, even though a matching index does exist.
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Changes
Refuse to modify a temporary table of another session with ALTER TABLE (Tom Lane) §
Permissions checks normally would prevent this case from arising, but it is possible to reach it by altering a parent table whose child is another session's temporary table. Throw an error if we discover that such a child table belongs to another session.
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Changes
Fix failure to recalculate sub-queries generated from MIN() or MAX() aggregates (Tom Lane) §
In some cases the aggregate result computed at one row of the outer query could be re-used for later rows when it should not be. This has only been seen to happen when the outer query uses DISTINCT that is implemented with hash aggregation, but other cases may exist.
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Changes
Avoid crashing when a JIT-inlined backend function throws an error (Tom Lane) §
The error state can include pointers into the dynamically loaded module holding the JIT-compiled code (for error location strings). In some code paths the module could get unloaded before the error report is processed, leading to SIGSEGV when the location strings are accessed.
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Changes
Cope with behavioral changes in libxml2 version 2.13.x (Erik Wienhold, Tom Lane) §
Notably, we now suppress “chunk is not well balanced” errors from libxml2, unless that is the only reported error. This is to make error reports consistent between 2.13.x and earlier libxml2 versions. In earlier versions, that message was almost always redundant or outright incorrect, so 2.13.x substantially reduced the number of cases in which it's reported.
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Changes
Fix handling of subtransactions of prepared transactions when starting a hot standby server (Heikki Linnakangas) §
When starting a standby's replay at a shutdown checkpoint WAL record, transactions that had been prepared but not yet committed on the primary are correctly understood as being still in progress. But subtransactions of a prepared transaction (created by savepoints or PL/pgSQL exception blocks) were not accounted for and would be treated as aborted. That led to inconsistency if the prepared transaction was later committed.
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Changes
Prevent incorrect initialization of logical replication slots (Masahiko Sawada) §
In some cases a replication slot's start point within the WAL stream could be set to a point within a transaction, leading to assertion failures or incorrect decoding results.
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Changes
Avoid memory leakage after servicing a notify or sinval interrupt (Tom Lane) §
The processing functions for these events could switch the current memory context to TopMemoryContext, resulting in session-lifespan leakage of any data allocated before the incorrect setting gets replaced. There were observable leaks associated with (at least) encoding conversion of incoming queries and parameters attached to Bind messages.
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Changes
Avoid possibly missing end-of-input events on Windows sockets (Thomas Munro) §
Windows reports an FD_CLOSE event only once after the remote end of the connection disconnects. With unlucky timing, we could miss that report and wait indefinitely, or at least until a timeout elapsed, expecting more input.
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Changes
Disable creation of stateful TLS session tickets by OpenSSL (Daniel Gustafsson) § § §
This avoids possible failures with clients that think receipt of a session ticket means that TLS session resumption is supported.
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Changes
When replanning a PL/pgSQL “simple expression”, check it's still simple (Tom Lane) §
Certain fairly-artificial cases, such as dropping a referenced function and recreating it as an aggregate, could lead to surprising failures such as “unexpected plan node type”.
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Changes
Fix incompatibility between PL/Perl and Perl 5.40 (Andrew Dunstan) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix recursive RECORD-returning PL/Python functions (Tom Lane) §
If we recurse to a new call of the same function that passes a different column definition list (AS clause), it would fail because the inner call would overwrite the outer call's idea of what rowtype to return.
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Changes
Don't corrupt PL/Python's TD dictionary during a recursive trigger call (Tom Lane) §
If a PL/Python-language trigger caused another one to be invoked, the TD dictionary created for the inner one would overwrite the outer one's TD dictionary.
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Changes
Fix PL/Tcl's reporting of invalid list syntax in the result of a function returning tuple (Erik Wienhold, Tom Lane) §
Such a case could result in a crash, or in emission of misleading context information that actually refers to the previous Tcl error.
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Changes
Avoid non-thread-safe usage of strerror() in libpq (Peter Eisentraut) §
Certain error messages returned by OpenSSL could become garbled in multi-threaded applications.
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Changes
Ensure that pg_restore -l reports dependent TOC entries correctly (Tom Lane) §
If -l was specified together with selective-restore options such as -n or -N, dependent TOC entries such as comments would be omitted from the listing, even when an actual restore would have selected them.
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Changes
Avoid clashing with system-provided <regex.h> headers (Thomas Munro) §
This fixes a compilation failure on macOS version 15 and up.
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Changes
Fix otherwise-harmless assertion failures in REINDEX CONCURRENTLY applied to an SP-GiST index (Tom Lane) §
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A dump/restore is not required for those running 12.X.
However, if you are upgrading from a version earlier than 12.18, see Section E.5.
Changes
Fix INSERT from multiple VALUES rows into a target column that is a domain over an array or composite type (Tom Lane) §
Such cases would either fail with surprising complaints about mismatched datatypes, or insert unexpected coercions that could lead to odd results.
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Changes
Fix incorrect pruning of NULL partition when a table is partitioned on a boolean column and the query has a boolean IS NOT clause (David Rowley) §
A NULL value satisfies a clause such as boolcol IS NOT FALSE
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Changes
Make ALTER FOREIGN TABLE SET SCHEMA move any owned sequences into the new schema (Tom Lane) §
Moving a regular table to a new schema causes any sequences owned by the table to be moved to that schema too (along with indexes and constraints). This was overlooked for foreign tables, however.
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Changes
Fix EXPLAIN's counting of heap pages accessed by a bitmap heap scan (Melanie Plageman) §
Previously, heap pages that contain no visible tuples were not counted; but it seems more consistent to count all pages returned by the bitmap index scan.
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Changes
Avoid deadlock during removal of orphaned temporary tables (Mikhail Zhilin) §
If the session that creates a temporary table crashes without removing the table, autovacuum will eventually try to remove the orphaned table. However, an incoming session that's been assigned the same temporary namespace will do that too. If a temporary table has a dependency (such as an owned sequence) then a deadlock could result between these two cleanup attempts.
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Changes
Avoid race condition while examining per-relation frozen-XID values (Noah Misch) §
VACUUM's computation of per-database frozen-XID values from per-relation values could get confused by a concurrent update of those values by another VACUUM.
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Changes
Disallow converting a table to a view within an outer SQL command that is using that table (Tom Lane) §
This avoids possible crashes.
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Changes
Ensure that join conditions generated from equivalence classes are applied at the correct plan level (Tom Lane) §
In versions before PostgreSQL 16, it was possible for generated conditions to be evaluated below outer joins when they should be evaluated above (after) the outer join, leading to incorrect query results. All versions have a similar hazard when considering joins to UNION ALL trees that have constant outputs for the join column in some SELECT arms.
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Changes
Avoid unnecessary use of moving-aggregate mode with a non-moving window frame (Vallimaharajan G) §
When a plain aggregate is used as a window function, and the window frame start is specified as UNBOUNDED PRECEDING, the frame's head cannot move so we do not need to use the special (and more expensive) moving-aggregate mode. This optimization was intended all along, but due to a coding error it never triggered.
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Changes
Avoid use of already-freed data while planning partition-wise joins under GEQO (Tom Lane) §
This would typically end in a crash or unexpected error message.
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Changes
Fix incorrectly-reported statistics kind codes in “requested statistics kind X is not yet built” error messages (David Rowley) §
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Changes
Be more careful with RECORD-returning functions in FROM (Tom Lane) § §
The output columns of such a function call must be defined by an AS clause that specifies the column names and data types. If the actual function output value doesn't match that, an error is supposed to be thrown at runtime. However, some code paths would examine the actual value prematurely, and potentially issue strange errors or suffer assertion failures if it doesn't match expectations.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix confusion about the return rowtype of SQL-language procedures (Tom Lane) §
A procedure implemented in SQL language that returns a single composite-type column would cause an assertion failure or core dump.
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Changes
Add protective stack depth checks to some recursive functions (Egor Chindyaskin) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Detect integer overflow when adding or subtracting an interval to/from a timestamp (Joseph Koshakow) §
Some cases that should cause an out-of-range error produced an incorrect result instead.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid race condition in pg_get_expr() (Tom Lane) §
If the relation referenced by the argument is dropped concurrently, the function's intention is to return NULL, but sometimes it failed instead.
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Changes
Fix detection of old transaction IDs in XID status functions (Karina Litskevich) §
Transaction IDs more than 231 transactions in the past could be misidentified as recent, leading to misbehavior of pg_xact_status() or txid_status().
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Changes
Fix file descriptor leakage when an error is thrown while waiting in WaitEventSetWait (Etsuro Fujita) §
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Changes
Throw an error if an index is accessed while it is being reindexed (Tom Lane) §
Previously this was just an assertion check, but promote it into a regular runtime error. This will provide a more on-point error message when reindexing a user-defined index expression that attempts to access its own table.
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Changes
Ensure that index-only scans on name columns return a fully-padded value (David Rowley) §
The value physically stored in the index is truncated, and previously a pointer to that value was returned to callers. This provoked complaints when testing under valgrind. In theory it could result in crashes, though none have been reported.
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Changes
Fix crash with DSM allocations larger than 4GB (Heikki Linnakangas) §
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Changes
Disconnect if a new server session's client socket cannot be put into non-blocking mode (Heikki Linnakangas) §
It was once theoretically possible for us to operate with a socket that's in blocking mode; but that hasn't worked fully in a long time, so fail at connection start rather than misbehave later.
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Changes
Fix inadequate error reporting with OpenSSL 3.0.0 and later (Heikki Linnakangas, Tom Lane) §
System-reported errors passed through by OpenSSL were reported with a numeric error code rather than anything readable.
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Changes
Avoid concurrent calls to bindtextdomain() in libpq and ecpglib (Tom Lane) § §
Although GNU gettext's implementation seems to be fine with concurrent calls, the version available on Windows is not.
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Changes
Fix crash in ecpg's preprocessor if the program tries to redefine a macro that was defined on the preprocessor command line (Tom Lane) § § §
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Changes
In ecpg, avoid issuing false “unsupported feature will be passed to server” warnings (Tom Lane) §
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Changes
Ensure that the string result of ecpg's intoasc() function is correctly zero-terminated (Oleg Tselebrovskiy) §
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Changes
Fix pg_dumpall so that role comments, if present, will be dumped regardless of the setting of --no-role-passwords (Daniel Gustafsson, Álvaro Herrera) § §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix PL/pgSQL's parsing of single-line comments (---style comments) following expressions (Erik Wienhold, Tom Lane) §
This mistake caused parse errors if such a comment followed a WHEN expression in a PL/pgSQL CASE statement.
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Changes
In contrib/amcheck, don't report false match failures due to short- versus long-header values (Andrey Borodin, Michael Zhilin) § §
A variable-length datum in a heap tuple or index tuple could have either a short or a long header, depending on compression parameters that applied when it was made. Treat these cases as equivalent rather than complaining if there's a difference.
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Changes
In contrib/postgres_fdw, avoid emitting requests to sort by a constant (David Rowley) §
This could occur in cases involving UNION ALL with constant-emitting subqueries. Sorting by a constant is useless of course, but it also risks being misinterpreted by the remote server, leading to “ORDER BY position N is not in select list” errors.
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Changes
Make contrib/postgres_fdw set the remote session's time zone to GMT not UTC (Tom Lane) §
This should have the same results for practical purposes. However, GMT is recognized by hard-wired code in the server, while UTC is looked up in the timezone database. So the old code could fail in the unlikely event that the remote server's timezone database is missing entries.
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Changes
In contrib/xml2, avoid use of library functions that have been deprecated in recent versions of libxml2 (Dmitry Koval) §
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Changes
Fix incompatibility with LLVM 18 (Thomas Munro, Dmitry Dolgov) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Allow make check to work with the musl C library (Thomas Munro, Bruce Momjian, Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
A dump/restore is not required for those running 12.X.
However, one bug was fixed that could have resulted in corruption of GIN indexes during concurrent updates. If you suspect such corruption, reindex affected indexes after installing this update.
Also, if you are upgrading from a version earlier than 12.17, see Section E.6.
Changes
Tighten security restrictions within REFRESH MATERIALIZED VIEW CONCURRENTLY (Heikki Linnakangas) § §
One step of a concurrent refresh command was run under weak security restrictions. If a materialized view's owner could persuade a superuser or other high-privileged user to perform a concurrent refresh on that view, the view's owner could control code executed with the privileges of the user running REFRESH. Fix things so that all user-determined code is run as the view's owner, as expected.
The only known exploit for this error does not work in PostgreSQL 16.0 and later, so it may be that v16 is not vulnerable in practice.
The PostgreSQL Project thanks Pedro Gallegos for reporting this problem. (CVE-2024-0985)
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix memory leak when performing JIT inlining (Andres Freund, Daniel Gustafsson) § §
There have been multiple reports of backend processes suffering out-of-memory conditions after sufficiently many JIT compilations. This fix should resolve that.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
When dequeueing from an LWLock, avoid needing to search the list of waiting processes (Andres Freund) §
This fixes O(N^2) behavior when the list of waiters is long. In some use-cases this results in substantial throughput improvements.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid generating incorrect partitioned-join plans (Richard Guo) §
Some uncommon situations involving lateral references could create incorrect plans. Affected queries could produce wrong answers, or odd failures such as “variable not found in subplan target list”, or executor crashes.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix incorrect wrapping of subquery output expressions in PlaceHolderVars (Tom Lane) §
This fixes incorrect results when a subquery is underneath an outer join and has an output column that laterally references something outside the outer join's scope. The output column might not appear as NULL when it should do so due to the action of the outer join.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid requesting an oversize shared-memory area in parallel hash join (Thomas Munro, Andrei Lepikhov, Alexander Korotkov) § §
The limiting value was too large, allowing “invalid DSA memory alloc request size” errors to occur with sufficiently large expected hash table sizes.
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Changes
Avoid assertion failures in heap_update() and heap_delete() when a tuple to be updated by a foreign-key enforcement trigger fails the extra visibility crosscheck (Alexander Lakhin) §
This error had no impact in non-assert builds.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix possible failure during ALTER TABLE ADD COLUMN on a complex inheritance tree (Tender Wang) §
If a grandchild table would inherit the new column via multiple intermediate parents, the command failed with “tuple already updated by self”.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix problems with duplicate token names in ALTER TEXT SEARCH CONFIGURATION ... MAPPING commands (Tender Wang, Michael Paquier) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Properly lock the associated table during DROP STATISTICS (Tomas Vondra) §
Failure to acquire the lock could result in “tuple concurrently deleted” errors if the DROP executes concurrently with ANALYZE.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix function volatility checking for GENERATED and DEFAULT expressions (Tom Lane) §
These places could fail to detect insertion of a volatile function default-argument expression, or decide that a polymorphic function is volatile although it is actually immutable on the datatype of interest. This could lead to improperly rejecting or accepting a GENERATED clause, or to mistakenly applying the constant-default-value optimization in ALTER TABLE ADD COLUMN.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Detect that a new catalog cache entry became stale while detoasting its fields (Tom Lane) § §
We expand any out-of-line fields in a catalog tuple before inserting it into the catalog caches. That involves database access which might cause invalidation of catalog cache entries — but the new entry isn't in the cache yet, so we would miss noticing that it should get invalidated. The result is a race condition in which an already-stale cache entry could get made, and then persist indefinitely. This would lead to hard-to-predict misbehavior. Fix by rechecking the tuple's visibility after detoasting.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix edge-case integer overflow detection bug on some platforms (Dean Rasheed) §
Computing 0 - INT64_MIN should result in an overflow error, and did on most platforms. However, platforms with neither integer overflow builtins nor 128-bit integers would fail to spot the overflow, instead returning INT64_MIN.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Detect Julian-date overflow when adding or subtracting an interval to/from a timestamp (Tom Lane) §
Some cases that should cause an out-of-range error produced an incorrect result instead.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Add more checks for overflow in interval_mul() and interval_div() (Dean Rasheed) §
Some cases that should cause an out-of-range error produced an incorrect result instead.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Make the pg_file_settings view check validity of unapplied values for settings with backend or superuser-backend context (Tom Lane) §
Invalid values were not noted in the view as intended. This escaped detection because there are very few settings in these groups.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Match collation too when matching an existing index to a new partitioned index (Peter Eisentraut) §
Previously we could accept an index that has a different collation from the corresponding element of the partition key, possibly leading to misbehavior.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix insufficient locking when cleaning up an incomplete split of a GIN index's internal page (Fei Changhong, Heikki Linnakangas) §
The code tried to do this with shared rather than exclusive lock on the buffer. This could lead to index corruption if two processes attempted the cleanup concurrently.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid premature release of buffer pin in GIN index insertion (Tom Lane) §
If an index root page split occurs concurrently with our own insertion, the code could fail with “buffer NNNN is not owned by resource owner”.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid failure with partitioned SP-GiST indexes (Tom Lane) §
Trying to use an index of this kind could lead to “No such file or directory” errors.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix ownership change reporting for large objects (Tom Lane) §
A no-op ALTER LARGE OBJECT OWNER command (that is, one selecting the existing owner) passed the wrong class ID to the PostAlterHook, probably confusing any extension using that hook.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Prevent standby servers from incorrectly processing dead index tuples during subtransactions (Fei Changhong) §
The startedInRecovery flag was not correctly set for a subtransaction. This affects only processing of dead index tuples. It could allow a query in a subtransaction to ignore index entries that it should return (if they are already dead on the primary server, but not dead to the standby transaction), or to prematurely mark index entries as dead that are not yet dead on the primary. It is not clear that the latter case has any serious consequences, but it's not the intended behavior.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix deadlock between a logical replication apply worker, its tablesync worker, and a session process trying to alter the subscription (Shlok Kyal) §
One edge of the deadlock loop did not involve a lock wait, so the deadlock went undetected and would persist until manual intervention.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Return the correct status code when a new client disconnects without responding to the server's password challenge (Liu Lang, Tom Lane) §
In some cases we'd treat this as a loggable error, which was not the intention and tends to create log spam, since common clients like psql frequently do this. It may also confuse extensions that use ClientAuthentication_hook.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix incompatibility with OpenSSL 3.2 (Tristan Partin, Bo Andreson) §
Use the BIO “app_data” field for our private storage, instead of assuming it's okay to use the “data” field. This mistake didn't cause problems before, but with 3.2 it leads to crashes and complaints about double frees.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Be more wary about OpenSSL not setting errno on error (Tom Lane) §
If errno isn't set, assume the cause of the reported failure is read EOF. This fixes rare cases of strange error reports like “could not accept SSL connection: Success”.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Report ENOMEM errors from file-related system calls as ERRCODE_OUT_OF_MEMORY, not ERRCODE_INTERNAL_ERROR (Alexander Kuzmenkov) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid race condition when libpq initializes OpenSSL support concurrently in two different threads (Willi Mann, Michael Paquier) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix timing-dependent failure in GSSAPI data transmission (Tom Lane) §
When using GSSAPI encryption in non-blocking mode, libpq sometimes failed with “GSSAPI caller failed to retransmit all data needing to be retried”.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
In pg_dump, don't dump RLS policies or security labels for extension member objects (Tom Lane, Jacob Champion) § §
Previously, commands would be included in the dump to set these properties, which is really incorrect since they should be considered as internal affairs of the extension. Moreover, the restoring user might not have adequate privilege to set them, and indeed the dumping user might not have enough privilege to dump them (since dumping RLS policies requires acquiring lock on their table).
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
In pg_dump, don't dump an extended statistics object if its underlying table isn't being dumped (Rian McGuire, Tom Lane) §
This conforms to the behavior for other dependent objects such as indexes.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix crash in contrib/intarray if an array with an element equal to INT_MAX is inserted into a gist__int_ops index (Alexander Lakhin, Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Report a better error when contrib/pageinspect's hash_bitmap_info() function is applied to a partitioned hash index (Alexander Lakhin, Michael Paquier) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Report a better error when contrib/pgstattuple's pgstathashindex() function is applied to a partitioned hash index (Alexander Lakhin) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
On Windows, suppress autorun options when launching subprocesses in pg_ctl and pg_regress (Kyotaro Horiguchi) § §
When launching a child process via cmd.exe, pass the /D flag to prevent executing any autorun commands specified in the registry. This avoids possibly-surprising side effects.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix compilation failures with libxml2 version 2.12.0 and later (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Suppress compiler warnings from Python's header files (Peter Eisentraut, Tom Lane) §
Our preferred compiler options provoke warnings about constructs appearing in recent versions of Python's header files. When using gcc, we can suppress these warnings with a pragma.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid deprecation warning when compiling with LLVM 18 (Thomas Munro) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Update time zone data files to tzdata release 2024a for DST law changes in Greenland, Kazakhstan, and Palestine, plus corrections for the Antarctic stations Casey and Vostok. Also historical corrections for Vietnam, Toronto, and Miquelon (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
A dump/restore is not required for those running 12.X.
However, if you use GiST indexes, it may be advisable to reindex them; see the fourth changelog entry below.
Also, if you are upgrading from a version earlier than 12.16, see Section E.7.
Changes
Fix handling of unknown-type arguments in DISTINCT "any" aggregate functions (Tom Lane) §
This error led to a text-type value being interpreted as an unknown-type value (that is, a zero-terminated string) at runtime. This could result in disclosure of server memory following the text value.
The PostgreSQL Project thanks Jingzhou Fu for reporting this problem. (CVE-2023-5868)
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Detect integer overflow while computing new array dimensions (Tom Lane) §
When assigning new elements to array subscripts that are outside the current array bounds, an undetected integer overflow could occur in edge cases. Memory stomps that are potentially exploitable for arbitrary code execution are possible, and so is disclosure of server memory.
The PostgreSQL Project thanks Pedro Gallegos for reporting this problem. (CVE-2023-5869)
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Prevent the pg_signal_backend role from signalling background workers and autovacuum processes (Noah Misch, Jelte Fennema-Nio) § §
The documentation says that pg_signal_backend cannot issue signals to superuser-owned processes. It was able to signal these background processes, though, because they advertise a role OID of zero. Treat that as indicating superuser ownership. The security implications of cancelling one of these process types are fairly small so far as the core code goes (we'll just start another one), but extensions might add background workers that are more vulnerable.
Also ensure that the is_superuser parameter is set correctly in such processes. No specific security consequences are known for that oversight, but it might be significant for some extensions.
The PostgreSQL Project thanks Hemanth Sandrana and Mahendrakar Srinivasarao for reporting this problem. (CVE-2023-5870)
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix misbehavior during recursive page split in GiST index build (Heikki Linnakangas) §
Fix a case where the location of a page downlink was incorrectly tracked, and introduce some logic to allow recovering from such situations rather than silently doing the wrong thing. This error could result in incorrect answers from subsequent index searches. It may be advisable to reindex all GiST indexes after installing this update.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix partition step generation and runtime partition pruning for hash-partitioned tables with multiple partition keys (David Rowley) § §
Some cases involving an IS NULL condition on one of the partition keys could result in a crash.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix edge case in btree mark/restore processing of ScalarArrayOpExpr clauses (Peter Geoghegan) §
When restoring an indexscan to a previously marked position, the code could miss required setup steps if the scan had advanced exactly to the end of the matches for a ScalarArrayOpExpr (that is, an indexcol = ANY(ARRAY[])) clause. This could result in missing some rows that should have been fetched.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix intra-query memory leak when a set-returning function repeatedly returns zero rows (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Don't crash if cursor_to_xmlschema() is applied to a non-data-returning Portal (Boyu Yang) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Throw the intended error if pgrowlocks() is applied to a partitioned table (David Rowley) §
Previously, a not-on-point complaint “only heap AM is supported” would be raised.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Handle invalid indexes more cleanly in assorted SQL functions (Noah Misch) §
Report an error if pgstatindex(), pgstatginindex(), pgstathashindex(), or pgstattuple() is applied to an invalid index. If brin_desummarize_range(), brin_summarize_new_values(), brin_summarize_range(), or gin_clean_pending_list() is applied to an invalid index, do nothing except to report a debug-level message. Formerly these functions attempted to process the index, and might fail in strange ways depending on what the failed CREATE INDEX had left behind.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid premature memory allocation failure with long inputs to to_tsvector() (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix over-allocation of the constructed tsvector in tsvectorrecv() (Denis Erokhin) §
If the incoming vector includes position data, the binary receive function left wasted space (roughly equal to the size of the position data) in the finished tsvector. In extreme cases this could lead to “maximum total lexeme length exceeded” failures for vectors that were under the length limit when emitted. In any case it could lead to wasted space on-disk.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix incorrect coding in gtsvector_picksplit() (Alexander Lakhin) §
This could lead to poor page-split decisions in GiST indexes on tsvector columns.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix COMMIT AND CHAIN/ROLLBACK AND CHAIN to work properly when there is an unreleased savepoint (Liu Xiang, Tom Lane) §
Instead of propagating the current transaction's properties to the new transaction, they propagated some previous transaction's properties.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid crash in EXPLAIN if a parameter marked to be displayed by EXPLAIN has a NULL boot-time value (Xing Guo, Aleksander Alekseev, Tom Lane) §
No built-in parameter fits this description, but an extension could define such a parameter.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ensure we have a snapshot while dropping ON COMMIT DROP temp tables (Tom Lane) §
This prevents possible misbehavior if any catalog entries for the temp tables have fields wide enough to require toasting (such as a very complex CHECK condition).
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid improper response to shutdown signals in child processes just forked by system() (Nathan Bossart) § §
This fix avoids a race condition in which a child process that has been forked off by system(), but hasn't yet exec'd the intended child program, might receive and act on a signal intended for the parent server process. That would lead to duplicate cleanup actions being performed, which will not end well.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Cope with torn reads of pg_control in frontend programs (Thomas Munro) §
On some file systems, reading pg_control may not be an atomic action when the server concurrently writes that file. This is detectable via a bad CRC. Retry a few times to see if the file becomes valid before we report error.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid torn reads of pg_control in relevant SQL functions (Thomas Munro) §
Acquire the appropriate lock before reading pg_control, to ensure we get a consistent view of that file.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid integer overflow when computing size of backend activity string array (Jakub Wartak) §
On 64-bit machines we will allow values of track_activity_query_size large enough to cause 32-bit overflow when multiplied by the allowed number of connections. The code actually allocating the per-backend local array was careless about this though, and allocated the array incorrectly.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Track the dependencies of cached CALL statements, and re-plan them when needed (Tom Lane) §
DDL commands, such as replacement of a function that has been inlined into a CALL argument, can create the need to re-plan a CALL that has been cached by PL/pgSQL. That was not happening, leading to misbehavior or strange errors such as “cache lookup failed”.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Track nesting depth correctly when inspecting RECORD-type Vars from outer query levels (Richard Guo) §
This oversight could lead to assertion failures, core dumps, or “bogus varno” errors.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid “record type has not been registered” failure when deparsing a view that contains references to fields of composite constants (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Allow extracting fields from a RECORD-type ROW() expression (Tom Lane) §
SQL code that knows that we name such fields f1, f2, etc can use those names to extract fields from the expression. This change was originally made in version 13, and is now being back-patched into older branches to support tests for a related bug.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix error-handling bug in RECORD type cache management (Thomas Munro) §
An out-of-memory error occurring at just the wrong point could leave behind inconsistent state that would lead to an infinite loop.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix assertion failure when logical decoding is retried in the same session after an error (Hou Zhijie) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Treat out-of-memory failures as fatal while reading WAL (Michael Paquier) §
Previously this would be treated as a bogus-data condition, leading to the conclusion that we'd reached the end of WAL, which is incorrect and could lead to inconsistent WAL replay.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix possible recovery failure due to trying to allocate memory based on a bogus WAL record length field (Thomas Munro, Michael Paquier) § §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ensure that standby-mode WAL recovery reports an error when an invalid page header is found (Yugo Nagata, Kyotaro Horiguchi) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid doing plan cache revalidation of utility statements that do not receive interesting processing during parse analysis (Tom Lane) §
Aside from saving a few cycles, this prevents failure after a cache invalidation for statements that must not set a snapshot, such as SET TRANSACTION ISOLATION LEVEL.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Keep by-reference attmissingval values in a long-lived context while they are being used (Andrew Dunstan) §
This avoids possible use of dangling pointers when a tuple slot outlives the tuple descriptor with which its value was constructed.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Recalculate the effective value of search_path after ALTER ROLE (Jeff Davis) § §
This ensures that after renaming a role, the meaning of the special string $user is re-determined.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix order of operations in GenericXLogFinish (Jeff Davis) §
This code violated the conditions required for crash safety by writing WAL before marking changed buffers dirty. No core code uses this function, but extensions do (contrib/bloom does, for example).
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Remove incorrect assertion in PL/Python exception handling (Alexander Lakhin) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix pg_restore so that selective restores will include both table-level and column-level ACLs for selected tables (Euler Taveira, Tom Lane) §
Formerly, only the table-level ACL would get restored if both types were present.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Add logic to pg_upgrade to check for use of abstime, reltime, and tinterval data types (Álvaro Herrera) § §
These obsolete data types were removed in PostgreSQL version 12, so check to make sure they aren't present in an older database before claiming it can be upgraded.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid generating invalid temporary slot names in pg_basebackup (Jelte Fennema) §
This has only been seen to occur when the server connection runs through pgbouncer.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid false “too many client connections” errors in pgbench on Windows (Noah Misch) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
In contrib/amcheck, do not report interrupted page deletion as corruption (Noah Misch) §
This fix prevents false-positive reports of “the first child of leftmost target page is not leftmost of its level”, “block NNNN is not leftmost” or “left link/right link pair in index XXXX not in agreement”. They appeared if amcheck ran after an unfinished btree index page deletion and before VACUUM had cleaned things up.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix failure of contrib/btree_gin indexes on interval columns, when an indexscan using the < or <= operator is performed (Dean Rasheed) §
Such an indexscan failed to return all the entries it should.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Suppress assorted build-time warnings on recent macOS (Tom Lane) § §
Xcode 15 (released with macOS Sonoma) changed the linker's behavior in a way that causes many duplicate-library warnings while building PostgreSQL. These were harmless, but they're annoying so avoid citing the same libraries twice. Also remove use of the -multiply_defined suppress linker switch, which apparently has been a no-op for a long time, and is now actively complained of.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Remove PHOT (Phoenix Islands Time) from the default timezone abbreviations list (Tom Lane) §
Presence of this abbreviation in the default list can cause failures on recent Debian and Ubuntu releases, as they no longer install the underlying tzdb entry by default. Since this is a made-up abbreviation for a zone with a total human population of about two dozen, it seems unlikely that anyone will miss it. If someone does, they can put it back via a custom abbreviations file.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
A dump/restore is not required for those running 12.X.
However, if you use BRIN indexes, it may be advisable to reindex them; see the second changelog entry below.
Also, if you are upgrading from a version earlier than 12.10, see Section E.13.
Changes
Disallow substituting a schema or owner name into an extension script if the name contains a quote, backslash, or dollar sign (Noah Misch) §
This restriction guards against SQL-injection hazards for trusted extensions.
The PostgreSQL Project thanks Micah Gates, Valerie Woolard, Tim Carey-Smith, and Christoph Berg for reporting this problem. (CVE-2023-39417)
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix confusion between empty (no rows) ranges and all-NULL ranges in BRIN indexes, as well as incorrect merging of all-NULL summaries (Tomas Vondra) § §
Each of these oversights could result in forgetting that a BRIN index range contains any NULL values, potentially allowing subsequent queries that should return NULL values to miss doing so.
This fix will not in itself correct faulty BRIN entries. It's recommended to REINDEX any BRIN indexes that may be used to search for nulls.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid leaving a corrupted database behind when DROP DATABASE is interrupted (Andres Freund) §
If DROP DATABASE was interrupted after it had already begun taking irreversible steps, the target database remained accessible (because the removal of its pg_database row would roll back), but it would have corrupt contents. Fix by marking the database as inaccessible before we begin to perform irreversible operations. A failure after that will leave the database still partially present, but nothing can be done with it except to issue another DROP DATABASE.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ensure that partitioned indexes are correctly marked as valid or not at creation (Michael Paquier) §
If a new partitioned index matches an existing but invalid index on one of the partitions, the partitioned index could end up being marked valid prematurely. This could lead to misbehavior or assertion failures in subsequent queries on the partitioned table.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ignore invalid child indexes when matching partitioned indexes to child indexes during ALTER TABLE ATTACH PARTITION (Michael Paquier) §
Such an index will now be ignored, and a new child index created instead.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix possible failure when marking a partitioned index valid after all of its partitions have been attached (Michael Paquier) §
The update of the index's pg_index entry could use stale data for other columns. One reported symptom is an “attempted to update invisible tuple” error.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix ALTER EXTENSION SET SCHEMA to complain if the extension contains any objects outside the extension's schema (Michael Paquier, Heikki Linnakangas) §
Erroring out if the extension contains objects in multiple schemas was always intended; but the check was mis-coded so that it would fail to detect some cases, leading to surprising behavior.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Don't use partial unique indexes for uniqueness proofs in the planner (David Rowley) §
This could give rise to incorrect plans, since the presumed uniqueness of rows read from a table might not hold if the index in question isn't used to scan the table.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid producing incorrect plans for foreign joins with pseudoconstant join clauses (Etsuro Fujita) §
The planner currently lacks support for attaching pseudoconstant join clauses to a pushed-down remote join, so disable generation of remote joins in such cases. (A better solution will require ABI-breaking changes of planner data structures, so it will have to wait for a future major release.)
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Changes
Correctly handle sub-SELECTs in RLS policy expressions and security-barrier views when expanding rule actions (Tom Lane) §
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Changes
Fix race conditions in conflict detection for SERIALIZABLE isolation mode (Thomas Munro) § § §
Conflicts could be missed when using bitmap heap scans, when using GIN indexes, and when examining an initially-empty btree index. All these cases could lead to serializability failures due to improperly allowing conflicting transactions to commit.
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Changes
Fix hash join with an inner-side hash key that contains Params coming from an outer nested loop (Tom Lane) §
When rescanning the join after the values of such Params have changed, we must rebuild the hash table, but neglected to do so. This could result in missing join output rows.
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Changes
Fix intermittent failures when trying to update a field of a composite column (Tom Lane) §
If the overall value of the composite column is wide enough to require out-of-line toasting, then an unluckily-timed cache flush could cause errors or server crashes.
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Changes
Prevent query-lifespan memory leaks in some UPDATE queries with triggers (Tomas Vondra) §
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Changes
Prevent stack-overflow crashes with very complex text search patterns (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Allow tokens up to 10240 bytes long in pg_hba.conf and pg_ident.conf (Tom Lane) §
The previous limit of 256 bytes has been found insufficient for some use-cases.
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Changes
Fix mishandling of C++ out-of-memory conditions (Heikki Linnakangas) §
If JIT is in use, running out of memory in a C++ new call would lead to a PostgreSQL FATAL error, instead of the expected C++ exception.
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Changes
Avoid losing track of possibly-useful shared memory segments when a page free results in coalescing ranges of free space (Dongming Liu) §
Ensure that the segment is moved into the appropriate “bin” for its new amount of free space, so that it will be found by subsequent searches.
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Changes
Allow VACUUM to continue after detecting certain types of b-tree index corruption (Peter Geoghegan) § §
If an invalid sibling-page link is detected, log the issue and press on, rather than throwing an error as before. Nothing short of REINDEX will fix the broken index, but preventing VACUUM from completing until that is done risks making matters far worse.
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Changes
Ensure that WrapLimitsVacuumLock is released after VACUUM detects invalid data in pg_database.datfrozenxid or pg_database.datminmxid (Andres Freund) §
Failure to release this lock could lead to a deadlock later, although the lock would be cleaned up if the session exits or encounters some other error.
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Changes
Avoid double replay of prepared transactions during crash recovery (suyu.cmj, Michael Paquier) § §
After a crash partway through a checkpoint with some two-phase transaction state data already flushed to disk by this checkpoint, crash recovery could attempt to replay the prepared transaction(s) twice, leading to a fatal error such as “lock is already held” in the startup process.
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Changes
Ensure that a newly created, but still empty table is fsync'ed at the next checkpoint (Heikki Linnakangas) §
Without this, if there is an operating system crash causing the empty file to disappear, subsequent operations on the table might fail with “could not open file” errors.
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Changes
Ensure that creation of the init fork of an unlogged index is WAL-logged (Heikki Linnakangas) §
While an unlogged index's main data fork is not WAL-logged, its init fork should be, to ensure that we have a consistent state to restore the index to after a crash. This step was missed if the init fork contains no data, which is a case not used by any standard index AM; but perhaps some extension behaves that way.
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Changes
Fix missing reinitializations of delay-checkpoint-end flags (suyu.cmj) §
This could result in unnecessary delays of checkpoints, or in assertion failures in assert-enabled builds.
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Changes
Fix overly strict assertion in jsonpath code (David Rowley) §
This assertion failed if a query applied the .type() operator to a like_regex result. There was no bug in non-assert builds.
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Changes
Avoid assertion failure when processing an empty statement via the extended query protocol in an already-aborted transaction (Tom Lane) §
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Changes
Fix contrib/fuzzystrmatch's Soundex difference() function to handle empty input sanely (Alexander Lakhin, Tom Lane) §
An input string containing no alphabetic characters resulted in unpredictable output.
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Changes
Tighten whitespace checks in contrib/hstore input (Evan Jones) §
In some cases, characters would be falsely recognized as whitespace and hence discarded.
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Changes
Disallow oversize input arrays with contrib/intarray's gist__int_ops index opclass (Ankit Kumar Pandey, Alexander Lakhin) §
Previously this code would report a NOTICE but press on anyway, creating an invalid index entry that presents a risk of crashes when the index is read.
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Changes
Avoid useless double decompression of GiST index entries in contrib/intarray (Konstantin Knizhnik, Matthias van de Meent, Tom Lane) §
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Changes
Ensure that pg_index.indisreplident is kept up-to-date in relation cache entries (Shruthi Gowda) §
This value could be stale in some cases. There is no core code that relies on the relation cache's copy, so this is only a latent bug as far as Postgres itself is concerned; but there may be extensions for which it is a live bug.
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Changes
Silence deprecation warnings when compiling with OpenSSL 3.0.0 or later (Peter Eisentraut) §
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A dump/restore is not required for those running 12.X.
However, if you are upgrading from a version earlier than 12.10, see Section E.13.
Changes
Prevent CREATE SCHEMA from defeating changes in search_path (Alexander Lakhin) § §
Within a CREATE SCHEMA command, objects in the prevailing search_path, as well as those in the newly-created schema, would be visible even within a called function or script that attempted to set a secure search_path. This could allow any user having permission to create a schema to hijack the privileges of a security definer function or extension script.
The PostgreSQL Project thanks Alexander Lakhin for reporting this problem. (CVE-2023-2454)
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Changes
Enforce row-level security policies correctly after inlining a set-returning function (Stephen Frost, Tom Lane) §
If a set-returning SQL-language function refers to a table having row-level security policies, and it can be inlined into a calling query, those RLS policies would not get enforced properly in some cases involving re-using a cached plan under a different role. This could allow a user to see or modify rows that should have been invisible.
The PostgreSQL Project thanks Wolfgang Walther for reporting this problem. (CVE-2023-2455)
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Changes
Avoid crash when the new schema name is omitted in CREATE SCHEMA (Michael Paquier) §
The SQL standard allows writing CREATE SCHEMA AUTHORIZATION , with the schema name defaulting to owner_nameowner_name. However some code paths expected the schema name to be present and would fail.
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Changes
Disallow altering composite types that are stored in indexes (Tom Lane) §
ALTER TYPE disallows non-binary-compatible modifications of composite types if they are stored in any table columns. (Perhaps that will be allowed someday, but it hasn't happened yet; the locking implications of rewriting many tables are daunting.) We overlooked the possibility that an index might contain a composite type that doesn't also appear in its table.
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Changes
Disallow system columns as elements of foreign keys (Tom Lane) §
Since the removal of OID as a system column, there is no plausible use-case for this, and various bits of code no longer support it. Disallow it rather than trying to fix all the cases.
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Changes
Ensure that COPY TO from an RLS-enabled parent table does not copy any rows from child tables (Antonin Houska) §
The documentation is quite clear that COPY TO copies rows from only the named table, not any inheritance children it may have. However, if row-level security was enabled on the table then this stopped being true.
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Changes
Avoid possible crash when array_position() or array_positions() is passed an empty array (Tom Lane) §
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Changes
Fix possible out-of-bounds fetch in to_char() (Tom Lane) §
With bad luck this could have resulted in a server crash.
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Changes
Avoid buffer overread in translate() function (Daniil Anisimov) §
When using the deletion feature, the function might fetch the byte just after the input string, creating a small risk of crash.
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Changes
Fix error cursor setting for parse errors in JSON string literals (Tom Lane) §
Most cases in which a syntax error is detected in a string literal within a JSON value failed to set the error cursor appropriately. This led at least to an unhelpful error message (pointing to the token before the string, rather than the actual trouble spot), and could even result in a crash in v14 and later.
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Changes
Fix data corruption due to vacuum_defer_cleanup_age being larger than the current 64-bit xid (Andres Freund) §
In v14 and later with non-default settings of vacuum_defer_cleanup_age, it was possible to compute a very large vacuum cleanup horizon xid, leading to vacuum removing rows that are still live. v12 and v13 have a lesser form of the same problem affecting only GiST indexes, which could lead to index pages getting recycled too early.
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Changes
Fix parser's failure to detect some cases of improperly-nested aggregates (Tom Lane) §
This oversight could lead to executor failures for queries that should have been rejected as invalid.
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Changes
Fix data structure corruption during parsing of serial SEQUENCE NAME options (David Rowley) §
This can lead to trouble if an event trigger captures the corrupted parse tree.
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Changes
Correctly update plan nodes' parallel-safety markings when moving initplans from one node to another (Tom Lane) §
This planner oversight could lead to “subplan was not initialized” errors at runtime.
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Changes
Disable the inverse-transition optimization for window aggregates when the call contains sub-SELECTs (David Rowley) §
This optimization requires that the aggregate's argument expressions have repeatable results, which might not hold for a sub-SELECT.
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Changes
Fix oversights in execution of nested ARRAY[] constructs (Alexander Lakhin, Tom Lane) §
Correctly detect overflow of the total space needed for the result array, avoiding a possible crash due to undersized output allocation. Also ensure that any trailing padding space in the result array is zeroed; while leaving garbage there is harmless for most purposes, it can result in odd behavior later.
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Changes
Prevent crash when updating a field within an array-of-domain-over-composite-type column (Dmitry Dolgov) §
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Changes
Fix partition pruning logic for partitioning on boolean columns (David Rowley) §
Pruning with a condition like boolcol IS NOT TRUE was done incorrectly, leading to possibly not returning rows in which boolcol is NULL. Also, the rather unlikely case of partitioning on NOT boolcol was handled incorrectly.
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Changes
Fix race condition in per-batch cleanup during parallel hash join (Thomas Munro, Melanie Plageman) §
A crash was possible given unlucky timing and parallel_leader_participation = off (which is not the default).
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Changes
Recalculate GENERATED columns after an EvalPlanQual check (Tom Lane) §
In READ COMMITTED isolation mode, the effects of a row update might need to get reapplied to a newer version of the row than the query found originally. If so, we need to recompute any GENERATED columns, in case they depend on columns that were changed by the concurrent update.
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Changes
Don't balance vacuum cost delay when a table has a per-relation vacuum_cost_delay setting of zero (Masahiko Sawada) §
Delay balancing is supposed to be disabled whenever autovacuum is processing a table with a per-relation vacuum_cost_delay setting, but this was done only for positive settings, not zero.
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Changes
Fix corner-case crashes when columns have been added to the end of a view (Tom Lane) §
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Changes
Repair rare failure of MULTIEXPR_SUBLINK subplans in partitioned updates (Andres Freund, Tom Lane) §
Use of the syntax INSERT ... ON CONFLICT DO UPDATE SET (c1, ...) = (SELECT ...) with a partitioned target table could result in failure if any child table is dissimilar from the parent (for example, different physical column order). This typically manifested as failure of consistency checks in the executor; but a crash or incorrect data updates are also possible.
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Changes
Fix handling of DEFAULT markers within a multi-row INSERT ... VALUES query on a view that has a DO ALSO INSERT ... SELECT rule (Dean Rasheed) §
Such cases typically failed with “unrecognized node type” errors or assertion failures.
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Changes
Support references to OLD and NEW within subqueries in rule actions (Dean Rasheed, Tom Lane) §
Such references are really lateral references, but the server could crash if the subquery wasn't explicitly marked with LATERAL. Arrange to do that implicitly when necessary.
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Changes
When decompiling a rule or SQL function body containing INSERT/UPDATE/DELETE within WITH, take care to print the correct alias for the target table (Tom Lane) §
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Changes
Fix glitches in SERIALIZABLE READ ONLY optimization (Thomas Munro) § §
Transactions already marked as “doomed” confused the safe-snapshot optimization for SERIALIZABLE READ ONLY transactions. The optimization was unnecessarily skipped in some cases. In other cases an assertion failure occurred (but there was no problem in non-assert builds).
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Changes
Avoid leaking cache callback slots in the pgoutput logical decoding plugin (Shi Yu) §
Multiple cycles of starting up and shutting down the plugin within a single session would eventually lead to an “out of relcache_callback_list slots” error.
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Changes
Fix dereference of dangling pointer during buffering build of a GiST index (Alexander Lakhin) §
This error seems to usually be harmless in production builds, as the fetched value is noncritical; but in principle it could cause a server crash.
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Changes
Ignore dropped columns and generated columns during logical replication of an update or delete action (Onder Kalaci, Shi Yu) § §
Replication with the REPLICA IDENTITY FULL option failed if the table contained such columns.
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Changes
Support RSA-PSS certificates with SCRAM-SHA-256 channel binding (Jacob Champion, Heikki Linnakangas) §
This feature requires building with OpenSSL 1.1.1 or newer. Both the server and libpq are affected.
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Changes
Avoid race condition with process ID tracking on Windows (Thomas Munro) § § §
The operating system could recycle a PID before the postmaster observed that that child process was gone. This could lead to tracking more than one child with the same PID, resulting in confusion.
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Changes
Add missing cases to SPI_result_code_string() (Dean Rasheed) §
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Changes
Fix erroneous Valgrind markings in AllocSetRealloc() (Karina Litskevich) §
In the unusual case where the size of a large (>8kB) palloc chunk is decreased, a Valgrind-aware build would mismark the defined-ness state of the memory released from the chunk, possibly causing incorrect results during Valgrind testing.
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Changes
Avoid assertion failure when decoding a transactional logical replication message (Tomas Vondra) §
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Changes
Avoid locale sensitivity when processing regular expression escapes (Jeff Davis) §
A backslash followed by a non-ASCII character could sometimes cause an assertion failure, depending on the prevailing locale.
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Changes
Avoid trying to write an empty WAL record in log_newpage_range() when the last few pages in the specified range are empty (Matthias van de Meent) §
It is not entirely clear whether this case is reachable in released branches, but if it is then an assertion failure could occur.
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Changes
Fix session-lifespan memory leakage in plpgsql DO blocks that use cast expressions (Ajit Awekar, Tom Lane) §
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Changes
Tighten array dimensionality checks when converting Perl list structures to multi-dimensional SQL arrays (Tom Lane) §
plperl could misbehave when the nesting of sub-lists is inconsistent so that the data does not represent a rectangular array of values. Such cases now produce errors, but previously they could result in a crash or garbage output.
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Changes
Tighten array dimensionality checks when converting Python list structures to multi-dimensional SQL arrays (Tom Lane) § §
plpython could misbehave when dealing with empty sub-lists, or when the nesting of sub-lists is inconsistent so that the data does not represent a rectangular array of values. The former should result in an empty output array, and the latter in an error. But some cases resulted in a crash, and others in unexpected output.
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Changes
Fix unwinding of exception stack in plpython (Xing Guo) §
Some rare failure cases could return without cleaning up the PG_TRY exception stack, risking a crash if another error was raised before the next stack level was unwound.
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Changes
Fix inconsistent GSS-encryption error handling in libpq's PQconnectPoll() (Michael Paquier) §
With gssencmode set to require, the connection was not marked dead after a GSS initialization failure. Make it fail immediately, as the equivalent case for TLS encryption has long done.
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Changes
Fix possible data corruption in ecpg programs built with the -C ORACLE option (Kyotaro Horiguchi) §
When ecpg_get_data() is called with varcharsize set to zero, it could write a terminating zero character into the last byte of the preceding field, truncating the data in that field.
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Changes
Fix pg_dump so that partitioned tables that are hash-partitioned on an enum-type column can be restored successfully (Tom Lane) §
Since the hash codes for enum values depend on the OIDs assigned to the enum, they are typically different after a dump and restore, meaning that rows often need to go into a different partition than they were in originally. Users can work around that by specifying the --load-via-partition-root option; but since there is very little chance of success without that, teach pg_dump to apply it automatically to such tables.
Also, fix pg_restore to not try to TRUNCATE target tables before restoring into them when --load-via-partition-root mode is used. This avoids a hazard of deadlocks and lost data.
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Changes
In contrib/hstore_plpython, avoid crashing if the Python value to be transformed isn't a mapping (Dmitry Dolgov, Tom Lane) §
This should give an error, but Python 3 changed some APIs in a way that caused the check to misbehave, allowing a crash to ensue.
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Changes
Fix misbehavior in contrib/pg_trgm with an unsatisfiable regular expression (Tom Lane) §
A regex such as $foo is legal but unsatisfiable; the regex compiler recognizes that and produces an empty NFA graph. Attempting to optimize such a graph into a pg_trgm GIN or GiST index qualification resulted in accessing off the end of a work array, possibly leading to crashes.
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Changes
Use the --strip-unneeded option when stripping static libraries with GNU-compatible strip (Tom Lane) §
Previously, make install-strip used the -x option in this case. This change avoids misbehavior of llvm-strip, and gives slightly smaller output as well.
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Changes
Stop recommending auto-download of DTD files for building the documentation, and indeed disable it (Aleksander Alekseev, Peter Eisentraut, Tom Lane) §
It appears no longer possible to build the SGML documentation without a local installation of the DocBook DTD files. Formerly xsltproc could download those files on-the-fly from sourceforge.net; but sourceforge.net now permits only HTTPS access, and no common version of xsltproc supports that. Hence, remove the bits of our documentation suggesting that that's possible or useful, and instead add xsltproc's --nonet option to the build recipes.
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Changes
When running TAP tests in PGXS builds, use a saner location for the temporary portlock directory (Peter Eisentraut) §
Place it under tmp_check in the build directory. With the previous coding, a PGXS build would try to place it in the installation directory, which is not necessarily writable.
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Changes
Update time zone data files to tzdata release 2023c for DST law changes in Egypt, Greenland, Morocco, and Palestine. (Tom Lane) §
When observing Moscow time, Europe/Kirov and Europe/Volgograd now use the abbreviations MSK/MSD instead of numeric abbreviations, for consistency with other timezones observing Moscow time. Also, America/Yellowknife is no longer distinct from America/Edmonton; this affects some pre-1948 timestamps in that area.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
A dump/restore is not required for those running 12.X.
However, if you are upgrading from a version earlier than 12.10, see Section E.13.
Changes
libpq can leak memory contents after GSSAPI transport encryption initiation fails (Jacob Champion) §
A modified server, or an unauthenticated man-in-the-middle, can send a not-zero-terminated error message during setup of GSSAPI (Kerberos) transport encryption. libpq will then copy that string, as well as following bytes in application memory up to the next zero byte, to its error report. Depending on what the calling application does with the error report, this could result in disclosure of application memory contents. There is also a small probability of a crash due to reading beyond the end of memory. Fix by properly zero-terminating the server message. (CVE-2022-41862)
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Allow REPLICA IDENTITY to be set on an index that's not (yet) valid (Tom Lane) §
When pg_dump dumps a partitioned index that's marked REPLICA IDENTITY, it generates a command sequence that applies REPLICA IDENTITY before the partitioned index has been marked valid, causing restore to fail. There seems no very good reason to prohibit doing it in that order, so allow it. The marking will have no effect anyway until the index becomes valid.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix handling of DEFAULT markers in rules that perform an INSERT from a multi-row VALUES list (Dean Rasheed) §
In some cases a DEFAULT marker would not get replaced with the proper default-value expression, leading to an “unrecognized node type” error.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Reject uses of undefined variables in jsonpath existence checks (Alexander Korotkov, David G. Johnston) §
While jsonpath match operators threw an error for an undefined variable in the path pattern, the existence operators silently treated it as a match.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix edge-case data corruption in parallel hash joins (Dmitry Astapov) §
If the final chunk of a large tuple being written out to a temporary file was exactly 32760 bytes, it would be corrupted due to a fencepost bug. The query would typically fail later with corrupted-data symptoms.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Honor non-default settings of checkpoint_completion_target (Bharath Rupireddy) §
Internal state was not updated after a change in checkpoint_completion_target, possibly resulting in performing checkpoint I/O faster or slower than desired, especially if that setting was changed on-the-fly.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Log the correct ending timestamp in recovery_target_xid mode (Tom Lane) §
When ending recovery based on the recovery_target_xid setting with recovery_target_inclusive = off, we printed an incorrect timestamp (always 2000-01-01) in the “recovery stopping before ... transaction” log message.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Prevent “wrong tuple length” failure at the end of VACUUM (Ashwin Agrawal, Junfeng Yang) §
This occurred if VACUUM needed to update the current database's datfrozenxid value and the database has so many granted privileges that its datacl value has been pushed out-of-line.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
In extended query protocol, avoid an immediate commit after ANALYZE if we're running a pipeline (Tom Lane) §
If there's not been an explicit BEGIN TRANSACTION, ANALYZE would take it on itself to commit, which should not happen within a pipelined series of commands.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Reject cancel request packets having the wrong length (Andrey Borodin) §
The server would process a cancel request even if its length word was too small. This led to reading beyond the end of the allocated buffer. In theory that could cause a segfault, but it seems quite unlikely to happen in practice, since the buffer would have to be very close to the end of memory. The more likely outcome was a bogus log message about wrong backend PID or cancel code. Complain about the wrong length, instead.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Add recursion and looping defenses in subquery pullup (Tom Lane) §
A contrived query can result in deep recursion and unreasonable amounts of time spent trying to flatten subqueries. A proper fix for that seems unduly invasive for a back-patch, but we can at least add stack depth checks and an interrupt check to allow the query to be cancelled.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix partitionwise-join code to tolerate failure to produce a plan for each partition (Tom Lane) §
This could result in “could not devise a query plan for the given query” errors.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Limit the amount of cleanup work done by get_actual_variable_range (Simon Riggs) §
Planner runs occurring just after deletion of a large number of tuples appearing at the end of an index could expend significant amounts of work setting the “killed” bits for those index entries. Limit the amount of work done in any one query by giving up on this process after examining 100 heap pages. All the cleanup will still happen eventually, but without so large a performance hiccup.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ensure that execution of full-text-search queries can be cancelled while they are performing phrase matches (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix memory leak in hashing strings with nondeterministic collations (Jeff Davis) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Clean up the libpq connection object after a failed replication connection attempt (Andres Freund) §
The previous coding leaked the connection object. In background code paths that's pretty harmless because the calling process will give up and exit. But in commands such as CREATE SUBSCRIPTION, such a failure resulted in a small session-lifespan memory leak.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
In hot-standby servers, reduce processing effort for tracking XIDs known to be active on the primary (Simon Riggs, Michail Nikolaev) §
Insufficiently-aggressive cleanup of the KnownAssignedXids array could lead to poor performance, particularly when max_connections is set to a large value on the standby.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix uninitialized-memory usage in logical decoding (Masahiko Sawada) §
In certain cases, resumption of logical decoding could try to re-use XID data that had already been freed, leading to unpredictable behavior.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid rare “failed to acquire cleanup lock” panic during WAL replay of hash-index page split operations (Robert Haas) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Advance a heap page's LSN when setting its all-visible bit during WAL replay (Jeff Davis) §
Failure to do this left the page possibly different on standby servers than the primary, and violated some other expectations about when the LSN changes. This seems only a theoretical hazard so far as PostgreSQL itself is concerned, but it could upset third-party tools.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Prevent unsafe usage of a relation cache entry's rd_smgr pointer (Amul Sul) §
Remove various assumptions that rd_smgr would stay valid over a series of operations, by wrapping all uses of it in a function that will recompute it if needed. This prevents bugs occurring when an unexpected cache flush occurs partway through such a series.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix latent buffer-overrun problem in WaitEventSet logic (Thomas Munro) §
The epoll-based and kqueue-based implementations could ask the kernel for too many events if the size of their internal buffer was different from the size of the caller's output buffer. That case is not known to occur in released PostgreSQL versions, but this error is a hazard for external modules and future bug fixes.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid nominally-undefined behavior when accessing shared memory in 32-bit builds (Andres Freund) §
clang's undefined-behavior sanitizer complained about use of a pointer that was less aligned than it should be. It's very unlikely that this would cause a problem in non-debug builds, but it's worth fixing for testing purposes.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Remove faulty assertion in useless-RESULT-RTE optimization logic (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix copy-and-paste errors in cache-lookup-failure messages for ACL checks (Justin Pryzby) §
In principle these errors should never be reached. But if they are, some of them reported the wrong type of object.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
In pg_dump, avoid calling unsafe server functions before we have locks on the tables to be examined (Tom Lane, Gilles Darold) § §
pg_dump uses certain server functions that can fail if examining a table that gets dropped concurrently. Avoid this type of failure by ensuring that we obtain access share lock before inquiring too deeply into a table's properties, and that we don't apply such functions to tables we don't intend to dump at all.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix tab completion of ALTER FUNCTION/PROCEDURE/ROUTINE ... SET SCHEMA (Dean Rasheed) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix faulty assertion in contrib/postgres_fdw (Etsuro Fujita) §
Changes
Fix contrib/seg to not crash or print garbage if an input number has more than 127 digits (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
In contrib/sepgsql, avoid deprecation warnings with recent libselinux (Michael Paquier) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix build on Microsoft Visual Studio 2013 (Tom Lane) §
A previous patch supposed that all platforms of interest have snprintf(), but MSVC 2013 isn't quite there yet. Revert to using sprintf() on that platform.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix compile failure in building PL/Perl with MSVC when using Strawberry Perl (Andrew Dunstan) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix mismatch of PL/Perl built with MSVC versus a Perl library built with gcc (Andrew Dunstan) §
Such combinations could previously fail with “loadable library and perl binaries are mismatched” errors.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Suppress compiler warnings from Perl's header files (Andres Freund) §
Our preferred compiler options provoke warnings about constructs appearing in recent versions of Perl's header files. When using gcc, we can suppress these warnings with a pragma.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix pg_waldump to build on compilers that don't discard unused static-inline functions (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Update time zone data files to tzdata release 2022g for DST law changes in Greenland and Mexico, plus historical corrections for northern Canada, Colombia, and Singapore. (Tom Lane) §
Notably, a new timezone America/Ciudad_Juarez has been split off from America/Ojinaga.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
A dump/restore is not required for those running 12.X.
However, if you are upgrading from a version earlier than 12.10, see Section E.13.
Changes
Avoid rare PANIC during updates occurring concurrently with VACUUM (Tom Lane, Jeff Davis) § §
If a concurrent VACUUM sets the all-visible flag bit in a page that UPDATE or DELETE is in process of modifying, the updating command needs to clear that bit again; but some code paths failed to do so, ending in a PANIC exit and database restart.
This is known to be possible in versions 14 and 15. It may be only latent in previous branches.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix VACUUM to press on if an attempted page deletion in a btree index fails to find the page's parent downlink (Peter Geoghegan) §
Rather than throwing an error, just log the issue and continue without deleting the empty page. Previously, a buggy operator class or corrupted index could indefinitely prevent completion of vacuuming of the index, eventually leading to transaction wraparound problems.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix handling of DEFAULT tokens that appear in a multi-row VALUES clause of an INSERT on an updatable view (Tom Lane) §
This oversight could lead to “cache lookup failed for type” errors, or in older branches even to crashes.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Disallow rules named _RETURN that are not ON SELECT (Tom Lane) §
This avoids confusion between a view's ON SELECT rule and any other rules it may have.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix resource management bug in saving tuples for AFTER triggers (Tom Lane) §
Given the right circumstances, this manifested as a “tupdesc reference NNNN is not owned by resource owner” error followed by a PANIC exit.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Repair rare failure of MULTIEXPR_SUBLINK subplans in inherited updates (Tom Lane) § § §
Use of the syntax UPDATE tab SET (c1, ...) = (SELECT ...) with an inherited or partitioned target table could result in failure if the child tables are sufficiently dissimilar. This typically manifested as failure of consistency checks in the executor; but a crash or incorrect data updates are also possible.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix construction of per-partition foreign key constraints while doing ALTER TABLE ATTACH PARTITION (Jehan-Guillaume de Rorthais, Álvaro Herrera) § §
Previously, incorrect or duplicate constraints could be constructed for the newly-added partition.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix generation of constraint names for per-partition foreign key constraints (Jehan-Guillaume de Rorthais) §
If the initially-given name is already in use for some constraint of the partition, a new one is selected; but it wasn't being spelled as intended.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix incorrect matching of index expressions and predicates when creating a partitioned index (Richard Guo, Tom Lane) §
While creating a partitioned index, we try to identify any existing indexes on the partitions that match the partitioned index, so that we can absorb those as child indexes instead of building new ones. Matching of expressions was not done right, so that a usable child index might be ignored, leading to creation of a duplicative index.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Prevent WAL corruption after a standby promotion (Dilip Kumar, Robert Haas) §
When a PostgreSQL instance performing archive recovery (but not using standby mode) is promoted, and the last WAL segment that it attempted to read ended in a partial record, the instance would write an invalid WAL segment on the new timeline.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix mis-ordering of WAL operations in fast insert path for GIN indexes (Matthias van de Meent, Zhang Mingli) §
This mistake is not known to have any negative consequences within core PostgreSQL, but it did cause issues for some extensions.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix bugs in logical decoding when replay starts from a point between the beginning of a transaction and the beginning of its subtransaction (Masahiko Sawada, Kuroda Hayato) § §
These errors could lead to assertion failures in debug builds, and otherwise to memory leaks.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Prevent examining system catalogs with the wrong snapshot during logical decoding (Masahiko Sawada) §
If decoding begins partway through a transaction that modifies system catalogs, the decoder may not recognize that, causing it to fail to treat that transaction as in-progress for catalog lookups.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Accept interrupts in more places during logical decoding (Amit Kapila, Masahiko Sawada) § §
This ameliorates problems with slow shutdown of replication workers.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid crash after function syntax error in replication workers (Maxim Orlov, Anton Melnikov, Masahiko Sawada, Tom Lane) §
If a syntax error occurred in a SQL-language or PL/pgSQL-language CREATE FUNCTION or DO command executed in a logical replication worker, the worker process would crash with a null pointer dereference or assertion failure.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix handling of read-write expanded datums that are passed to SQL functions (Tom Lane) §
If a non-inlined SQL function uses a parameter in more than one place, and one of those functions expects to be able to modify read-write datums in place, then later uses of the parameter would observe the wrong value. (Within core PostgreSQL, the expanded-datum mechanism is only used for array and composite-type values; but extensions might use it for other structured types.)
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix type circle's equality comparator to handle NaNs properly (Ranier Vilela) §
If the left-hand circle had a floating-point NaN for its radius, it would be considered equal to a circle with the same center and any radius.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
In Snowball dictionaries, don't try to stem excessively-long words (Olly Betts, Tom Lane) §
If the input word exceeds 1000 bytes, return it as-is after case folding, rather than trying to run it through the Snowball code. This restriction protects against a known recursion-to-stack-overflow problem in the Turkish stemmer, and it seems like good insurance against any other safety or performance issues that may exist in the Snowball stemmers. Such a long string is surely not a word in any human language, so it's doubtful that the stemmer would have done anything desirable with it anyway.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix use-after-free hazard in string comparisons (Tom Lane) §
Improper memory management in the string comparison functions could result in scribbling on no-longer-allocated buffers, potentially breaking things for whatever is using that memory now. This would only happen with fairly long strings (more than 1kB), and only if an ICU collation is in use.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Add plan-time check for attempted access to a table that has no table access method (Tom Lane) §
This prevents a crash in some catalog-corruption scenarios, for example use of a view whose ON SELECT rule is missing.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Prevent postmaster crash when shared-memory state is corrupted (Tom Lane) §
The postmaster process is supposed to survive and initiate a database restart if shared memory becomes corrupted, but one bit of code was being insufficiently cautious about that.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid long-term memory leakage in the autovacuum launcher process (Reid Thompson) §
The lack of field reports suggests that this problem is only latent in pre-v15 branches; but it's not very clear why, so back-patch the fix anyway.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Improve PL/pgSQL's ability to handle parameters declared as RECORD (Tom Lane) §
Build a separate function cache entry for each concrete type passed to the RECORD parameter during a session, much as we do for polymorphic parameters. This allows some usages to work that previously failed with errors such as “type of parameter does not match that when preparing the plan”.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Add missing guards for NULL connection pointer in libpq (Daniele Varrazzo, Tom Lane) §
There's a convention that libpq functions should check for a NULL PGconn argument, and fail gracefully instead of crashing. PQflush() and PQisnonblocking() didn't get that memo, so fix them.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
In ecpg, fix omission of variable storage classes when multiple varchar or bytea variables are declared in the same declaration (Andrey Sokolov) §
For example, ecpg translated static varchar str1[10], str2[20], str3[30]; in such a way that only str1 was marked static.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Allow cross-platform tablespace relocation in pg_basebackup (Robert Haas) §
Allow the remote path in --tablespace-mapping to be either a Unix-style or Windows-style absolute path, since the source server could be on a different OS than the local system.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
In pg_stat_statements, fix access to already-freed memory (zhaoqigui) §
This occurred if pg_stat_statements tracked a ROLLBACK command issued via extended query protocol. In debug builds it consistently led to an assertion failure. In production builds there would often be no visible ill effect; but if the freed memory had already been reused, the likely result would be to store garbage for the query string.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
In postgres_fdw, ensure that target lists constructed for EvalPlanQual plans will have all required columns (Richard Guo, Etsuro Fujita) §
This avoids “variable not found in subplan target list” errors in rare cases.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Reject unwanted output from the platform's uuid_create() function (Nazir Bilal Yavuz) §
The uuid-ossp module expects libc's uuid_create() to produce a version-1 UUID, but recent NetBSD releases produce a version-4 (random) UUID instead. Check for that, and complain if so. Drop the documentation's claim that the NetBSD implementation is usable for uuid-ossp. (If a version-4 UUID is okay for your purposes, you don't need uuid-ossp at all; just use gen_random_uuid().)
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Include new Perl test modules in standard installations (Álvaro Herrera) §
Add PostgreSQL/Test/Cluster.pm and PostgreSQL/Test/Utils.pm to the standard installation file set in pre-version-15 branches. This is for the benefit of extensions that want to use newly-written test code in older branches.
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Changes
On NetBSD, force dynamic symbol resolution at postmaster start (Andres Freund, Tom Lane) §
This avoids a risk of deadlock in the dynamic linker on NetBSD 10.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix incompatibilities with LLVM 15 (Thomas Munro, Andres Freund) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Allow use of __sync_lock_test_and_set() for spinlocks on any machine (Tom Lane) §
This eases porting to new machine architectures, at least if you're using a compiler that supports this GCC builtin function.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Rename symbol REF to REF_P to avoid compile failure on recent macOS (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid using sprintf, to avoid compile-time deprecation warnings (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Update time zone data files to tzdata release 2022f for DST law changes in Chile, Fiji, Iran, Jordan, Mexico, Palestine, and Syria, plus historical corrections for Chile, Crimea, Iran, and Mexico. (Tom Lane) §
Also, the Europe/Kiev zone has been renamed to Europe/Kyiv. Also, the following zones have been merged into nearby, more-populous zones whose clocks have agreed with them since 1970: Antarctica/Vostok, Asia/Brunei, Asia/Kuala_Lumpur, Atlantic/Reykjavik, Europe/Amsterdam, Europe/Copenhagen, Europe/Luxembourg, Europe/Monaco, Europe/Oslo, Europe/Stockholm, Indian/Christmas, Indian/Cocos, Indian/Kerguelen, Indian/Mahe, Indian/Reunion, Pacific/Chuuk, Pacific/Funafuti, Pacific/Majuro, Pacific/Pohnpei, Pacific/Wake and Pacific/Wallis. (This indirectly affects zones that were already links to one of these: Arctic/Longyearbyen, Atlantic/Jan_Mayen, Iceland, Pacific/Ponape, Pacific/Truk, and Pacific/Yap.) America/Nipigon, America/Rainy_River, America/Thunder_Bay, Europe/Uzhgorod, and Europe/Zaporozhye were also merged into nearby zones after discovering that their claimed post-1970 differences from those zones seem to have been errors. In all these cases, the previous zone name remains as an alias; but the actual data is that of the zone that was merged into.
These zone mergers result in loss of pre-1970 timezone history for the merged zones, which may be troublesome for applications expecting consistency of timestamptz display. As an example, the stored value 1944-06-01 12:00 UTC would previously display as 1944-06-01 13:00:00+01 if the Europe/Stockholm zone is selected, but now it will read out as 1944-06-01 14:00:00+02.
It is possible to build the time zone data files with options that will restore the older zone data, but that choice also inserts a lot of other old (and typically poorly-attested) zone data, resulting in more total changes from the previous release than accepting these upstream changes does. PostgreSQL has chosen to ship the tzdb data as-recommended, and so far as we are aware most major operating system distributions are doing likewise. However, if these changes cause significant problems for your application, a possible solution is to install a local build of the time zone data files using tzdb's backwards-compatibility options (see their PACKRATDATA and PACKRATLIST options).
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
A dump/restore is not required for those running 12.X.
However, if you are upgrading from a version earlier than 12.10, see Section E.13.
Changes
Do not let extension scripts replace objects not already belonging to the extension (Tom Lane) §
This change prevents extension scripts from doing CREATE OR REPLACE if there is an existing object that does not belong to the extension. It also prevents CREATE IF NOT EXISTS in the same situation. This prevents a form of trojan-horse attack in which a hostile database user could become the owner of an extension object and then modify it to compromise future uses of the object by other users. As a side benefit, it also reduces the risk of accidentally replacing objects one did not mean to.
The PostgreSQL Project thanks Sven Klemm for reporting this problem. (CVE-2022-2625)
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Changes
Fix replay of CREATE DATABASE WAL records on standby servers (Kyotaro Horiguchi, Asim R Praveen, Paul Guo) § § § §
Standby servers may encounter missing tablespace directories when replaying database-creation WAL records. Prior to this patch, a standby would fail to recover in such a case; however, such directories could be legitimately missing. Create the tablespace (as a plain directory), then check that it has been dropped again once replay reaches a consistent state.
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Changes
Support “in place” tablespaces (Thomas Munro, Michael Paquier, Álvaro Herrera) §
Normally a Postgres tablespace is a symbolic link to a directory on some other filesystem. This change allows it to just be a plain directory. While this has no use for separating tables onto different filesystems, it is a convenient setup for testing. Moreover, it is necessary to support the CREATE DATABASE replay fix, which transiently creates a missing tablespace as an “in place” tablespace.
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Changes
Fix permissions checks in CREATE INDEX (Nathan Bossart, Noah Misch) §
The fix for CVE-2022-1552 caused CREATE INDEX to apply the table owner's permissions while performing lookups of operator classes and other objects, where formerly the calling user's permissions were used. This broke dump/restore scenarios, because pg_dump issues CREATE INDEX before re-granting permissions.
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Changes
In extended query protocol, force an immediate commit after CREATE DATABASE and other commands that can't run in a transaction block (Tom Lane) §
If the client does not send a Sync message immediately after such a command, but instead sends another command, any failure in that command would lead to rolling back the preceding command, typically leaving inconsistent state on-disk (such as a missing or extra database directory). The mechanisms intended to prevent that situation turn out to work for multiple commands in a simple-Query message, but not for a series of extended-protocol messages. To prevent inconsistency without breaking use-cases that work today, force an implicit commit after such commands.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix race condition when checking transaction visibility (Simon Riggs) §
TransactionIdIsInProgress could report false before the subject transaction is considered visible, leading to various misbehaviors. The race condition window is normally very narrow, but use of synchronous replication makes it much wider, because the wait for a synchronous replica happens in that window.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix queries in which a “whole-row variable” references the result of a function that returns a domain over composite type (Tom Lane) §
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Changes
Fix “variable not found in subplan target list” planner error when pulling up a sub-SELECT that's referenced in a GROUPING function (Richard Guo) §
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Changes
Fix ALTER TABLE ... ENABLE/DISABLE TRIGGER to handle recursion correctly for triggers on partitioned tables (Álvaro Herrera, Amit Langote) § §
In certain cases, a “trigger does not exist” failure would occur because the command would try to adjust the trigger on a child partition that doesn't have it.
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Changes
Improve syntax error messages for type jsonpath (Andrew Dunstan) §
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Changes
Prevent pg_stat_get_subscription() from possibly returning an extra row containing garbage values (Kuntal Ghosh) §
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Changes
Ensure that pg_stop_backup() cleans up session state properly (Fujii Masao) §
This omission could lead to assertion failures or crashes later in the session.
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Changes
Fix join alias matching in FOR [KEY] UPDATE/SHARE clauses (Dean Rasheed) §
In corner cases, a misleading error could be reported.
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Changes
Avoid crashing if too many column aliases are attached to an XMLTABLE or JSON_TABLE construct (Álvaro Herrera) § §
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Changes
Reject ROW() expressions and functions in FROM that have too many columns (Tom Lane) § §
Cases with more than about 1600 columns are unsupported, and have always failed at execution. However, it emerges that some earlier code could be driven to assertion failures or crashes by queries with more than 32K columns. Add a parse-time check to prevent that.
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Changes
When decompiling a view or rule, show a SELECT output column's AS "?column?" alias clause if it could be referenced elsewhere (Tom Lane) §
Previously, this auto-generated alias was always hidden; but there are corner cases where doing so results in a non-restorable view or rule definition.
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Changes
Fix dumping of a view using a function in FROM that returns a composite type, when column(s) of the composite type have been dropped since the view was made (Tom Lane) §
This oversight could lead to dump/reload or pg_upgrade failures, as the dumped view would have too many column aliases for the function.
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Changes
Report implicitly-created operator families to event triggers (Masahiko Sawada) §
If CREATE OPERATOR CLASS results in the implicit creation of an operator family, that object was not reported to event triggers that should capture such events.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix control file updates made when a restartpoint is running during promotion of a standby server (Kyotaro Horiguchi) §
Previously, when the restartpoint completed it could incorrectly update the last-checkpoint fields of the control file, potentially leading to PANIC and failure to restart if the server crashes before the next normal checkpoint completes.
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Changes
Prevent triggering of standby's wal_receiver_timeout during logical replication of large transactions (Wang Wei, Amit Kapila) §
If a large transaction on the primary server sends no data to the standby (perhaps because no table it changes is published), it was possible for the standby to timeout. Fix that by ensuring we send keepalive messages periodically in such situations.
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Changes
Disallow nested backup operations in logical replication walsenders (Fujii Masao) §
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Changes
Fix memory leak in logical replication subscribers (Hou Zhijie) §
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Changes
Prevent open-file leak when reading an invalid timezone abbreviation file (Kyotaro Horiguchi) §
Such cases could result in harmless warning messages.
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Changes
Allow custom server parameters to have short descriptions that are NULL (Steve Chavez) §
Previously, although extensions could choose to create such settings, some code paths would crash while processing them.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix erroneous assertion checks in shared hashtable management (Thomas Munro) §
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Changes
Arrange to clean up after commit-time errors within SPI_commit(), rather than expecting callers to do that (Peter Eisentraut, Tom Lane) § §
Proper cleanup is complicated and requires use of low-level facilities, so it's not surprising that no known caller got it right. This led to misbehaviors when a PL procedure issued COMMIT but a failure occurred (such as a deferred constraint check). To improve matters, redefine SPI_commit() as starting a new transaction, so that it becomes equivalent to SPI_commit_and_chain() except that you get default transaction characteristics instead of preserving the prior transaction's characteristics. To make this somewhat transparent API-wise, redefine SPI_start_transaction() as a no-op. All known callers of SPI_commit() immediately call SPI_start_transaction(), so they will not notice any change. Similar remarks apply to SPI_rollback().
Also fix PL/Python, which omitted any handling of such errors at all, resulting in jumping out of the Python interpreter. This is reported to crash Python 3.11. Older Python releases leak some memory but seem okay with it otherwise.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Remove misguided SSL key file ownership check in libpq (Tom Lane) §
In the previous minor releases, we copied the server's permission checking rules for SSL private key files into libpq. But we should not have also copied the server's file-ownership check. While that works in normal use-cases, it can result in an unexpected failure for clients running as root, and perhaps in other cases.
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Changes
Ensure ecpg reports server connection loss sanely (Tom Lane) §
Misprocessing of a libpq-generated error result, such as a report of lost connection, would lead to printing “(null)” instead of a useful error message; or in older releases it would lead to a crash.
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Changes
Avoid core dump in ecpglib with unexpected orders of operations (Tom Lane) §
Certain operations such as EXEC SQL PREPARE would crash (rather than reporting an error as expected) if called before establishing any database connection.
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Changes
In ecpglib, avoid redundant newlocale() calls (Noah Misch) § §
Allocate a C locale object once per process when first connecting, rather than creating and freeing locale objects once per query. This mitigates a libc memory leak on AIX, and may offer some performance benefit everywhere.
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Changes
In psql's \watch command, echo a newline after cancellation with control-C (Pavel Stehule) §
This prevents libedit (and possibly also libreadline) from becoming confused about which column the cursor is in.
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Changes
Fix possible report of wrong error condition after clone() failure in pg_upgrade with --clone option (Justin Pryzby) §
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Changes
Fix contrib/pg_stat_statements to avoid problems with very large query-text files on 32-bit platforms (Tom Lane) §
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Changes
Ensure that contrib/postgres_fdw sends constants of regconfig and other reg* types with proper schema qualification (Tom Lane) §
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Changes
Block signals while allocating dynamic shared memory on Linux (Thomas Munro) § § §
This avoids problems when a signal interrupts posix_fallocate().
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Changes
Detect unexpected EEXIST error from shm_open() (Thomas Munro) §
This avoids a possible crash on Solaris.
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Changes
Adjust PL/Perl test case so it will work under Perl 5.36 (Dagfinn Ilmari Mannsåker) §
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Changes
Avoid incorrectly using an out-of-date libldap_r library when multiple OpenLDAP installations are present while building PostgreSQL (Tom Lane) §
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A dump/restore is not required for those running 12.X.
However, if you are upgrading from a version earlier than 12.10, see Section E.13.
Changes
Confine additional operations within “security restricted operation” sandboxes (Sergey Shinderuk, Noah Misch) § §
Autovacuum, CLUSTER, CREATE INDEX, REINDEX, REFRESH MATERIALIZED VIEW, and pg_amcheck activated the “security restricted operation” protection mechanism too late, or even not at all in some code paths. A user having permission to create non-temporary objects within a database could define an object that would execute arbitrary SQL code with superuser permissions the next time that autovacuum processed the object, or that some superuser ran one of the affected commands against it.
The PostgreSQL Project thanks Alexander Lakhin for reporting this problem. (CVE-2022-1552)
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Changes
Stop using query-provided column aliases for the columns of whole-row variables that refer to plain tables (Tom Lane) §
The column names in tuples produced by a whole-row variable (such as tbl.* in contexts other than the top level of a SELECT list) are now always those of the associated named composite type, if there is one. We'd previously attempted to make them track any column aliases that had been applied to the FROM entry the variable refers to. But that's semantically dubious, because really then the output of the variable is not at all of the composite type it claims to be. Previous attempts to deal with that inconsistency had bad results up to and including storing unreadable data on disk, so just give up on the whole idea.
In cases where it's important to be able to relabel such columns, a workaround is to introduce an extra level of sub-SELECT, so that the whole-row variable is referring to the sub-SELECT's output and not to a plain table. Then the variable is of type record to begin with and there's no issue.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix incorrect output for types timestamptz and timetz in table_to_xmlschema() and allied functions (Renan Soares Lopes) §
The xmlschema output for these types included a malformed regular expression.
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Changes
Avoid core dump in parser for a VALUES clause with zero columns (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix planner errors for GROUPING() constructs that reference outer query levels (Richard Guo, Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix plan generation for index-only scans on indexes with both returnable and non-returnable columns (Tom Lane) §
The previous coding could try to read non-returnable columns in addition to the returnable ones. This was fairly harmless because it didn't actually do anything with the bogus values, but it fell foul of a recently-added error check that rejected such a plan.
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Changes
Avoid accessing a no-longer-pinned shared buffer while attempting to lock an outdated tuple during EvalPlanQual (Tom Lane) §
The code would touch the buffer a couple more times after releasing its pin. In theory another process could recycle the buffer (or more likely, try to defragment its free space) as soon as the pin is gone, probably leading to failure to find the newer version of the tuple.
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Changes
Fix query-lifespan memory leak in an IndexScan node that is performing reordering (Aliaksandr Kalenik) §
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Changes
Fix ALTER FUNCTION to support changing a function's parallelism property and its SET-variable list in the same command (Tom Lane) §
The parallelism property change was lost if the same command also updated the function's SET clause.
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Changes
Fix bogus errors from attempts to alter system columns of tables (Tom Lane) §
The system should just tell you that you can't do it, but sometimes it would report “no owned sequence found” instead.
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Changes
Fix mis-sorting of table rows when CLUSTERing using an index whose leading key is an expression (Peter Geoghegan, Thomas Munro) §
The table would be rebuilt with the correct data, but in an order having little to do with the index order.
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Changes
Fix risk of deadlock failures while dropping a partitioned index (Jimmy Yih, Gaurab Dey, Tom Lane) §
Ensure that the required table and index locks are taken in the standard order (parents before children, tables before indexes). The previous coding for DROP INDEX did it differently, and so could deadlock against concurrent queries taking these locks in the standard order.
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Changes
Fix race condition between DROP TABLESPACE and checkpointing (Nathan Bossart) §
The checkpoint forced by DROP TABLESPACE could sometimes fail to remove all dead files from the tablespace's directory, leading to a bogus “tablespace is not empty” error.
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Changes
Fix possible trouble in crash recovery after a TRUNCATE command that overlaps a checkpoint (Kyotaro Horiguchi, Heikki Linnakangas, Robert Haas) § §
TRUNCATE must ensure that the table's disk file is truncated before the checkpoint is allowed to complete. Otherwise, replay starting from that checkpoint might find unexpected data in the supposedly-removed pages, possibly causing replay failure.
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Changes
Fix unsafe toast-data accesses during temporary object cleanup (Andres Freund) §
Temporary-object deletion during server process exit could fail with “FATAL: cannot fetch toast data without an active snapshot”. This was usually harmless since the next use of that temporary schema would clean up successfully.
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Changes
Improve wait logic in RegisterSyncRequest (Thomas Munro) §
If we run out of space in the checkpointer sync request queue (which is hopefully rare on real systems, but is common when testing with a very small buffer pool), we wait for it to drain. While waiting, we should report that as a wait event so that users know what is going on, and also watch for postmaster death, since otherwise the loop might never terminate if the checkpointer has already exited.
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Changes
Fix “PANIC: xlog flush request is not satisfied” failure during standby promotion when there is a missing WAL continuation record (Sami Imseih) §
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Changes
Fix possibility of self-deadlock in hot standby conflict handling (Andres Freund) § § §
With unlucky timing, the WAL-applying process could get stuck while waiting for some other process to release a buffer lock.
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Changes
Ensure that logical replication apply workers can be restarted even when we're up against the max_sync_workers_per_subscription limit (Amit Kapila) §
Faulty coding of the limit check caused a restarted worker to exit immediately, leaving fewer workers than there should be.
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Changes
Include unchanged replica identity key columns in the WAL log for an update, if they are stored out-of-line (Dilip Kumar, Amit Kapila) §
Otherwise subscribers cannot see the values and will fail to replicate the update.
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Changes
Improve logical replication subscriber's error message for an unsupported relation kind (Tom Lane) §
v13 and later servers support publishing partitioned tables. Older server versions cannot handle subscribing to such a table, and they gave a very misleading error message: “table XYZ not found on publisher”. Arrange to deliver a more on-point message.
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Changes
Disallow execution of SPI functions during PL/Perl function compilation (Tom Lane) §
Perl can be convinced to execute user-defined code during compilation of a PL/Perl function. However, it's not okay for such code to try to invoke SQL operations via SPI. That results in a crash, and if it didn't crash it would be a security hazard, because we really don't want code execution during function validation. Put in a check to give a friendlier error message instead.
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Changes
Make libpq accept root-owned SSL private key files (David Steele) § §
This change synchronizes libpq's rules for safe ownership and permissions of SSL key files with the rules the server has used since release 9.6. Namely, in addition to the current rules, allow the case where the key file is owned by root and has permissions rw-r----- or less. This is helpful for system-wide management of key files.
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Changes
Fix behavior of libpq's PQisBusy() function after a connection failure (Tom Lane) §
If we'd detected a write failure, PQisBusy() would always return true, which is the wrong thing: we want input processing to carry on normally until we've read whatever is available from the server. The practical effect of this error is that applications using libpq's async-query API would typically detect connection loss only when PQconsumeInput() returns a hard failure. With this fix, a connection loss will normally be reported via an error PGresult object, which is a much cleaner behavior for most applications.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Make pg_ctl recheck postmaster aliveness while waiting for stop/restart/promote actions (Tom Lane) §
pg_ctl would verify that the postmaster is alive as a side-effect of sending the stop or promote signal, but then it just naively waited to see the on-disk state change. If the postmaster died uncleanly without having removed its PID file or updated the control file, pg_ctl would wait until timeout. Instead make it recheck every so often that the postmaster process is still there.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix error handling in pg_waldump (Kyotaro Horiguchi, Andres Freund) § §
While trying to read a WAL file to determine the WAL segment size, pg_waldump would report an incorrect error for the case of a too-short file. In addition, the file name reported in this and related error messages could be garbage.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ensure that contrib/pageinspect functions cope with all-zero pages (Michael Paquier) §
This is a legitimate edge case, but the module was mostly unprepared for it. Arrange to return nulls, or no rows, as appropriate; that seems more useful than raising an error.
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Changes
In contrib/pageinspect, add defenses against incorrect page “special space” contents, tighten checks for correct page size, and add some missing checks that an index is of the expected type (Michael Paquier, Justin Pryzby, Julien Rouhaud) § § §
These changes make it less likely that the module will crash on bad data.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
In contrib/postgres_fdw, verify that ORDER BY clauses are safe to ship before requesting a remotely-ordered query, and include a USING clause if necessary (Ronan Dunklau) §
This fix prevents situations where the remote server might sort in a different order than we intend. While sometimes that would be only cosmetic, it could produce thoroughly wrong results if the remote data is used as input for a locally-performed merge join.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Update JIT code to work with LLVM 14 (Thomas Munro) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Clean up assorted failures under clang's -fsanitize=undefined checks (Tom Lane, Andres Freund, Zhihong Yu) § § § § §
Most of these changes are just for pro-forma compliance with the letter of the C and POSIX standards, and are unlikely to have any effect on production builds.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix PL/Perl so it builds on C compilers that don't support statements nested within expressions (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix possible build failure of pg_dumpall on Windows, when not using MSVC to build (Andres Freund) §
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Changes
In Windows builds, use gendef instead of pexports to build DEF files (Andrew Dunstan) §
This adapts the build process to work on recent MSys tool chains.
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Changes
Prevent extra expansion of shell wildcard patterns in programs built under MinGW (Andrew Dunstan) §
For some reason the C library provided by MinGW will expand shell wildcard characters in a program's command-line arguments by default. This is confusing, not least because it doesn't happen under MSVC, so turn it off.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Update time zone data files to tzdata release 2022a for DST law changes in Palestine, plus historical corrections for Chile and Ukraine. (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
A dump/restore is not required for those running 12.X.
However, if you have applied REINDEX CONCURRENTLY to a TOAST table's index, or observe failures to access TOAST datums, see the first changelog entry below.
Also, if you are upgrading from a version earlier than 12.9, see Section E.14.
Changes
Enforce standard locking protocol for TOAST table updates, to prevent problems with REINDEX CONCURRENTLY (Michael Paquier) §
If applied to a TOAST table or TOAST table's index, REINDEX CONCURRENTLY tended to produce a corrupted index. This happened because sessions updating TOAST entries released their ROW EXCLUSIVE locks immediately, rather than holding them until transaction commit as all other updates do. The fix is to make TOAST updates hold the table lock according to the normal rule. Any existing corrupted indexes can be repaired by reindexing again.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix incorrect plan creation for parallel single-child Append nodes (David Rowley) §
In some cases the Append would be simplified away when it should not be, leading to wrong query results (duplicated rows).
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix index-only scan plans for cases where not all index columns can be returned (Tom Lane) § §
If an index has both returnable and non-returnable columns, and one of the non-returnable columns is an expression using a table column that appears in a returnable index column, then a query using that expression could result in an index-only scan plan that attempts to read the non-returnable column, instead of recomputing the expression from the returnable column as intended. The non-returnable column would read as NULL, resulting in wrong query results.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ensure that casting to an unspecified typmod generates a RelabelType node rather than a length-coercion function call (Tom Lane) §
While the coercion function should do the right thing (nothing), this translation is undesirably inefficient.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix WAL replay failure when database consistency is reached exactly at a WAL page boundary (Álvaro Herrera) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix startup of a physical replica to tolerate transaction ID wraparound (Abhijit Menon-Sen, Tomas Vondra) §
If a replica server is started while the set of active transactions on the primary crosses a wraparound boundary (so that there are some newer transactions with smaller XIDs than older ones), the replica would fail with “out-of-order XID insertion in KnownAssignedXids”. The replica would retry, but could never get past that error.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Remove lexical limitations for SQL commands issued on a logical replication connection (Tom Lane) § §
The walsender process would fail for a SQL command containing an unquoted semicolon, or with dollar-quoted literals containing odd numbers of single or double quote marks, or when the SQL command starts with a comment. Moreover, faulty error recovery could lead to unexpected errors in later commands too.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix possible loss of the commit timestamp for the last subtransaction of a transaction (Alex Kingsborough, Kyotaro Horiguchi) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Be sure to fsync the pg_logical/mappings subdirectory during checkpoints (Nathan Bossart) §
On some filesystems this oversight could lead to losing logical rewrite status files after a system crash.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Build extended statistics for partitioned tables (Justin Pryzby) §
A previous bug fix disabled building of extended statistics for old-style inheritance trees, but it also prevented building them for partitioned tables, which was an unnecessary restriction. This change allows ANALYZE to compute values for statistics objects for partitioned tables. (But note that autovacuum does not process partitioned tables as such, so you must periodically issue manual ANALYZE on the partitioned table if you want to maintain such statistics.)
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ignore extended statistics for inheritance trees (Justin Pryzby) §
Currently, extended statistics values are only computed locally for each table, not for entire inheritance trees. However the values were mistakenly consulted when planning queries across inheritance trees, possibly resulting in worse-than-default estimates.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Disallow altering data type of a partitioned table's columns when the partitioned table's row type is used as a composite type elsewhere (Tom Lane) §
This restriction has long existed for regular tables, but through an oversight it was not checked for partitioned tables.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Disallow ALTER TABLE ... DROP NOT NULL for a column that is part of a replica identity index (Haiying Tang, Hou Zhijie) §
The same prohibition already existed for primary key indexes.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Correctly update cached table state during ALTER TABLE ADD PRIMARY KEY USING INDEX (Hou Zhijie) §
Concurrent sessions failed to update their opinion of whether the table has a primary key, possibly causing incorrect logical replication behavior.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Correctly update cached table state when switching REPLICA IDENTITY index (Tang Haiying, Hou Zhijie) §
Concurrent sessions failed to update their opinion of which index is the replica identity one, possibly causing incorrect logical replication behavior.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid leaking memory during REASSIGN OWNED BY operations that reassign ownership of many objects (Justin Pryzby) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix display of cert authentication method's options in pg_hba_file_rules view (Magnus Hagander) §
The cert authentication method implies clientcert=verify-full, but the pg_hba_file_rules view incorrectly reported clientcert=verify-ca.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix display of whole-row variables appearing in INSERT ... VALUES rules (Tom Lane) §
A whole-row variable would be printed as “var.*”, but that allows it to be expanded to individual columns when the rule is reloaded, resulting in different semantics. Attach an explicit cast to prevent that, as we do elsewhere.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix or remove some incorrect assertions (Simon Riggs, Michael Paquier, Alexander Lakhin) § § §
These errors should affect only debug builds, not production.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix race condition that could lead to failure to localize error messages that are reported early in multi-threaded use of libpq or ecpglib (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid calling strerror from libpq's PQcancel function (Tom Lane) §
PQcancel is supposed to be safe to call from a signal handler, but strerror is not safe. The faulty usage only occurred in the unlikely event of failure to send the cancel message to the server, perhaps explaining the lack of reports.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Make psql's \password command default to setting the password for CURRENT_USER, not the connection's original user name (Tom Lane) §
This agrees with the documented behavior, and avoids probable permissions failure if SET ROLE or SET SESSION AUTHORIZATION has been done since the session began. To prevent confusion, the role name to be acted on is now included in the password prompt.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
In psql and some other client programs, avoid trying to invoke gettext() from a control-C signal handler (Tom Lane) §
While no reported failures have been traced to this mistake, it seems highly unlikely to be a safe thing to do.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Allow canceling the initial password prompt in pg_receivewal and pg_recvlogical (Tom Lane, Nathan Bossart) §
Previously it was impossible to terminate these programs via control-C while they were prompting for a password.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix pg_dump's dump ordering for user-defined casts (Tom Lane) §
In rare cases, the output script might refer to a user-defined cast before it had been created.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix pg_dump's --inserts and --column-inserts modes to handle tables containing both generated columns and dropped columns (Tom Lane) § §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix possible mis-reporting of errors in pg_dump and pg_basebackup (Tom Lane) § §
The previous code failed to check for errors from some kernel calls, and could report the wrong errno values in other cases.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix results of index-only scans on contrib/btree_gist indexes on char( columns (Tom Lane) §N)
Index-only scans returned column values with trailing spaces removed, which is not the expected behavior. That happened because that's how the data was stored in the index. This fix changes the code to store char( values with the expected amount of space padding. The behavior of such an index will not change immediately unless you N)REINDEX it; otherwise space-stripped values will be gradually replaced over time during updates. Queries that do not use index-only scan plans will be unaffected in any case.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Change configure to use Python's sysconfig module, rather than the deprecated distutils module, to determine how to build PL/Python (Peter Eisentraut, Tom Lane, Andres Freund) §
With Python 3.10, this avoids configure-time warnings about distutils being deprecated and scheduled for removal in Python 3.12. Presumably, once 3.12 is out, configure --with-python would fail altogether. This future-proofing does come at a cost: sysconfig did not exist before Python 2.7, nor before 3.2 in the Python 3 branch, so it is no longer possible to build PL/Python against long-dead Python versions.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix PL/Perl compile failure on Windows with Perl 5.28 and later (Victor Wagner) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix PL/Python compile failure with Python 3.11 and later (Peter Eisentraut) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Add support for building with Visual Studio 2022 (Hans Buschmann) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Allow the .bat wrapper scripts in our MSVC build system to be called without first changing into their directory (Anton Voloshin, Andrew Dunstan) § §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
A dump/restore is not required for those running 12.X.
However, note that installations using physical replication should update standby servers before the primary server, as explained in the third changelog entry below.
Also, several bugs have been found that may have resulted in corrupted indexes, as explained in the next several changelog entries. If any of those cases apply to you, it's recommended to reindex possibly-affected indexes after updating.
Also, if you are upgrading from a version earlier than 12.6, see Section E.17.
Changes
Make the server reject extraneous data after an SSL or GSS encryption handshake (Tom Lane) §
A man-in-the-middle with the ability to inject data into the TCP connection could stuff some cleartext data into the start of a supposedly encryption-protected database session. This could be abused to send faked SQL commands to the server, although that would only work if the server did not demand any authentication data. (However, a server relying on SSL certificate authentication might well not do so.)
The PostgreSQL Project thanks Jacob Champion for reporting this problem. (CVE-2021-23214)
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Make libpq reject extraneous data after an SSL or GSS encryption handshake (Tom Lane) §
A man-in-the-middle with the ability to inject data into the TCP connection could stuff some cleartext data into the start of a supposedly encryption-protected database session. This could probably be abused to inject faked responses to the client's first few queries, although other details of libpq's behavior make that harder than it sounds. A different line of attack is to exfiltrate the client's password, or other sensitive data that might be sent early in the session. That has been shown to be possible with a server vulnerable to CVE-2021-23214.
The PostgreSQL Project thanks Jacob Champion for reporting this problem. (CVE-2021-23222)
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix physical replication for cases where the primary crashes after shipping a WAL segment that ends with a partial WAL record (Álvaro Herrera) § § §
If the primary did not survive long enough to finish writing the rest of the incomplete WAL record, then the previous crash-recovery logic had it back up and overwrite WAL starting from the beginning of the incomplete WAL record. This is problematic since standby servers may already have copies of that WAL segment. They will then see an inconsistent next segment, and will not be able to recover without manual intervention. To fix, do not back up over a WAL segment boundary when restarting after a crash. Instead write a new type of WAL record at the start of the next WAL segment, informing readers that the incomplete WAL record will never be finished and must be disregarded.
When applying this update, it's best to update standby servers before the primary, so that they will be ready to handle this new WAL record type if the primary happens to crash.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix CREATE INDEX CONCURRENTLY to wait for the latest prepared transactions (Andrey Borodin) §
Rows inserted by just-prepared transactions might be omitted from the new index, causing queries relying on the index to miss such rows. The previous fix for this type of problem failed to account for PREPARE TRANSACTION commands that were still in progress when CREATE INDEX CONCURRENTLY checked for them. As before, in installations that have enabled prepared transactions (max_prepared_transactions > 0), it's recommended to reindex any concurrently-built indexes in case this problem occurred when they were built.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid race condition that can cause backends to fail to add entries for new rows to an index being built concurrently (Noah Misch, Andrey Borodin) §
While it's apparently rare in the field, this case could potentially affect any index built or reindexed with the CONCURRENTLY option. It is recommended to reindex any such indexes to make sure they are correct.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix float4 and float8 hash functions to produce uniform results for NaNs (Tom Lane) § § §
Since PostgreSQL's floating-point types deem all NaNs to be equal, it's important for the hash functions to produce the same hash code for all bit-patterns that are NaNs according to the IEEE 754 standard. This failed to happen before, meaning that hash indexes and hash-based query plans might produce incorrect results for non-canonical NaN values. ('-NaN'::float8 is one way to produce such a value on most machines.) It is advisable to reindex hash indexes on floating-point columns, if there is any possibility that they might contain such values.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Prevent data loss during crash recovery of CREATE TABLESPACE, when wal_level = minimal (Noah Misch) §
If the server crashed between CREATE TABLESPACE and the next checkpoint, replay would fully remove the contents of the new tablespace's directory, relying on subsequent WAL replay to restore everything within that directory. This interacts badly with optimizations that skip writing WAL (one example is COPY into a just-created table). Such optimizations are applied only when wal_level is minimal, which is not the default in v10 and later.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ensure that the relation cache is invalidated for a table being attached to or detached from a partitioned table (Amit Langote, Álvaro Herrera) §
This oversight could allow misbehavior of subsequent inserts/updates addressed directly to the partition, but only in currently-existing sessions.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ensure that the relation cache is invalidated when creating or dropping a FOR ALL TABLES publication (Hou Zhijie, Vignesh C) §
This oversight could lead to improper replication behavior until all currently-existing sessions have exited.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Don't discard a cast to the same type with unspecified type modifier (Tom Lane) §
For example, if column f1 is of type numeric(18,3), the parser used to simply discard a cast like f1::numeric, on the grounds that it would have no run-time effect. That's true, but the exposed type of the expression should still be considered to be plain numeric, not numeric(18,3). This is important for correctly resolving the type of larger constructs, such as recursive UNIONs.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix updates of element fields in arrays of domain over composite (Tom Lane) §
A command such as UPDATE tab SET fld[1].subfld = val failed if the array's elements were domains rather than plain composites.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Disallow creating an ICU collation if the current database's encoding won't support it (Tom Lane) §
Previously this was allowed, but then the collation could not be referenced because of the way collation lookup works; you could not use the collation, nor even drop it.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix corner-case loss of precision in numeric power() (Dean Rasheed) §
The result could be inaccurate when the first argument is very close to 1.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid regular expression errors with capturing parentheses inside {0} (Tom Lane) §
Regular expressions like (.){0}...\1 drew “invalid backreference number”. Other regexp engines such as Perl don't complain, though, and for that matter ours doesn't either in some closely related cases. Worse, it could throw an assertion failure instead. Fix it so that no error is thrown and instead the back-reference is silently deemed to never match.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Prevent regular expression back-references from sometimes matching when they shouldn't (Tom Lane) §
The regexp engine was careless about clearing match data for capturing parentheses after rejecting a partial match. This could allow a later back-reference to match in places where it should fail for lack of a defined referent.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix regular expression performance bug with back-references inside iteration nodes (Tom Lane) §
Incorrect back-tracking logic could result in exponential time spent looking for a match. Fortunately the problem is masked in most cases by other optimizations.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix incorrect results from AT TIME ZONE applied to a time with time zone value (Tom Lane) §
The results were incorrect if the target time zone was specified by a dynamic timezone abbreviation (that is, one that is defined as equivalent to a full time zone name, rather than a fixed UTC offset).
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix mistranslation of PlaceHolderVars to inheritance child relations (Tom Lane) §
This error could result in assertion failures, or in mis-planning of queries having partitioned or inherited tables on the nullable side of an outer join.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid using MCV-only statistics to estimate the range of a column (Tom Lane) §
There are corner cases in which ANALYZE will build a most-common-values (MCV) list but not a histogram, even though the MCV list does not account for all the observed values. In such cases, keep the planner from using the MCV list alone to estimate the range of column values.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix restoration of a Portal's snapshot inside a subtransaction (Bertrand Drouvot) §
If a procedure commits or rolls back a transaction, and then its next significant action is inside a new subtransaction, snapshot management went wrong, leading to a dangling pointer and probable crash. A typical example in PL/pgSQL is a COMMIT immediately followed by a BEGIN ... EXCEPTION block that performs a query.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Clean up correctly if a transaction fails after exporting its snapshot (Dilip Kumar) §
This oversight would only cause a problem if the same session attempted to export a snapshot again. The most likely scenario for that is creation of a replication slot (followed by rollback) and then creation of another replication slot.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Prevent wraparound of overflowed-subtransaction tracking on standby servers (Kyotaro Horiguchi, Alexander Korotkov) §
This oversight could cause significant performance degradation (manifesting as excessive SubtransSLRU traffic) on standby servers.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ensure that prepared transactions are properly accounted for during promotion of a standby server (Michael Paquier, Andres Freund) §
There was a narrow window where a prepared transaction could be omitted from a snapshot taken by a concurrently-running session. If that session then used the snapshot to perform data updates, erroneous results or data corruption could occur.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Refuse to rewind a cursor marked NO SCROLL if it has been held over from a previous transaction due to the WITH HOLD option (Tom Lane) §
We have long forbidden fetching backwards from a NO SCROLL cursor, but for historical reasons the prohibition didn't extend to cases in which we rewind the query altogether and then re-fetch forwards. That exception leads to inconsistencies, particularly for held-over cursors which may not have stored all the data necessary to rewind. Disallow rewinding for non-scrollable held-over cursors to block the worst inconsistencies. (v15 will remove the exception altogether.)
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix possible failure while saving a WITH HOLD cursor at transaction end, if it had already been read to completion (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix detection of a relation that has grown to the maximum allowed length (Tom Lane) §
An attempt to extend a table or index past the limit of 2^32-1 blocks was rejected, but not soon enough to prevent inconsistent internal state from being created.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Correctly track the presence of data-modifying CTEs when expanding a DO INSTEAD rule (Greg Nancarrow, Tom Lane) §
The previous failure to do this could lead to problems such as unsafely choosing a parallel plan.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix incorrect reporting of permissions failures on extended statistics objects (Tomas Vondra) § §
The code typically produced “cache lookup error” rather than the intended message.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix incorrect snapshot handling in parallel workers (Greg Nancarrow) §
This oversight could lead to misbehavior in parallel queries if the transaction isolation level is less than REPEATABLE READ.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix logical decoding to correctly ignore toast-table changes for transient tables (Bertrand Drouvot) §
Logical decoding normally ignores changes in transient tables such as those created during an ALTER TABLE heap rewrite. But that filtering wasn't applied to the associated toast table if any, leading to possible errors when rewriting a table that's being published.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ensure that walreceiver processes create all required archive notification files before exiting (Fujii Masao) §
If a walreceiver exited exactly at a WAL segment boundary, it failed to make a notification file for the last-received segment, thus delaying archiving of that segment on the standby.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid trying to lock the OLD and NEW pseudo-relations in a rule that uses SELECT FOR UPDATE (Masahiko Sawada, Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix parser's processing of aggregate FILTER clauses (Tom Lane) §
If the FILTER expression is a plain boolean column, the semantic level of the aggregate could be mis-determined, leading to not-per-spec behavior. If the FILTER expression is itself a boolean-returning aggregate, an error should be thrown but was not, likely resulting in a crash at execution.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ensure that the correct lock level is used when renaming a table (Nathan Bossart, Álvaro Herrera) § §
For historical reasons, ALTER INDEX ... RENAME can be applied to any sort of relation. The lock level required to rename an index is lower than that required to rename a table or other kind of relation, but the code got this wrong and would use the weaker lock level whenever the command is spelled ALTER INDEX.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid trying to clean up LLVM state after an error within LLVM (Andres Freund, Justin Pryzby) §
This prevents a likely crash during backend exit after a fatal LLVM error.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid null-pointer-dereference crash when dropping a role that owns objects being dropped concurrently (Álvaro Herrera) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Prevent “snapshot reference leak” warning when lo_export() or a related function fails (Heikki Linnakangas) § §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ensure that scans of SP-GiST indexes are counted in the statistics views (Tom Lane) §
Incrementing the number-of-index-scans counter was overlooked in the SP-GiST code, although per-tuple counters were advanced correctly.
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Changes
Recalculate relevant wait intervals if recovery_min_apply_delay is changed during recovery (Soumyadeep Chakraborty, Ashwin Agrawal) §
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Changes
Fix infinite loop if a simplehash.h hash table reaches 2^32 elements (Yura Sokolov) §
It seems unlikely that this bug has been hit in practice, as it would require work_mem settings of hundreds of gigabytes for existing uses of simplehash.h.
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Changes
Reduce memory consumption during calculation of extended statistics (Justin Pryzby, Tomas Vondra) § §
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Changes
Disallow setting huge_pages to on when shared_memory_type is sysv (Thomas Munro) §
Previously, this setting was accepted, but it did nothing for lack of any implementation.
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Changes
Fix ecpg to recover correctly after malloc() failure while establishing a connection (Michael Paquier) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix misevaluation of stable functions called in the arguments of a PL/pgSQL CALL statement (Tom Lane) §
They were being called with an out-of-date snapshot, so that they would not see any database changes made since the start of the session's top-level command.
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Changes
Allow EXIT out of the outermost block in a PL/pgSQL routine (Tom Lane) §
If the routine does not require an explicit RETURN, this usage should be valid, but it was rejected.
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Changes
Remove pg_ctl's hard-coded limits on the total length of generated commands (Phil Krylov) §
For example, this removes a restriction on how many command-line options can be passed through to the postmaster. Individual path names that pg_ctl deals with, such as the postmaster executable's name or the data directory name, are still limited to MAXPGPATH bytes in most cases.
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Changes
Fix pg_dump to dump non-global default privileges correctly (Neil Chen, Masahiko Sawada) §
If a global (unrestricted) ALTER DEFAULT PRIVILEGES command revoked some present-by-default privilege, for example EXECUTE for functions, and then a restricted ALTER DEFAULT PRIVILEGES command granted that privilege again for a selected role or schema, pg_dump failed to dump the restricted privilege grant correctly.
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Changes
Make pg_dump acquire shared lock on partitioned tables that are to be dumped (Tom Lane) §
This oversight was usually pretty harmless, since once pg_dump has locked any of the leaf partitions, that would suffice to prevent significant DDL on the partitioned table itself. However problems could ensue when dumping a childless partitioned table, since no relevant lock would be held.
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Changes
Improve pg_dump's performance by avoiding making per-table queries for RLS policies, and by avoiding repetitive calls to format_type() (Tom Lane) § §
These changes provide only marginal improvement when dumping from a local server, but a dump from a remote server can benefit substantially due to fewer network round-trips.
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Changes
Fix crash in pg_dump when attempting to dump trigger definitions from a pre-8.3 server (Tom Lane) §
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Changes
Fix incorrect filename in pg_restore's error message about an invalid large object TOC file (Daniel Gustafsson) §
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Changes
Ensure that pgbench exits with non-zero status after a socket-level failure (Yugo Nagata, Fabien Coelho) §
The desired behavior is to finish out the run but then exit with status 2. Also, fix the reporting of such errors.
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Changes
Fix failure of contrib/btree_gin indexes on "char" (not char() columns, when an indexscan using the n)< or <= operator is performed (Tom Lane) §
Such an indexscan failed to return all the entries it should.
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Changes
Change contrib/pg_stat_statements to read its “query texts” file in units of at most 1GB (Tom Lane) §
Such large query text files are very unusual, but if they do occur, the previous coding would fail on Windows 64 (which rejects individual read requests of more than 2GB).
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Changes
Fix null-pointer crash when contrib/postgres_fdw tries to report a data conversion error (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Add spinlock support for the RISC-V architecture (Marek Szuba) §
This is essential for reasonable performance on that platform.
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Changes
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Set correct type identifier on OpenSSL BIO (I/O abstraction) objects created by PostgreSQL (Itamar Gafni) §
This oversight probably only matters for code that is doing tasks like auditing the OpenSSL installation. But it's nominally a violation of the OpenSSL API, so fix it.
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Changes
Fix our pkg-config files to again support static linking of libpq (Peter Eisentraut) §
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Changes
Make pg_regexec() robust against an out-of-range search_start parameter (Tom Lane) §
Return REG_NOMATCH, instead of possibly crashing, when search_start is past the end of the string. This case is probably unreachable within core PostgreSQL, but extensions might be more careless about the parameter value.
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Changes
Ensure that GetSharedSecurityLabel() can be used in a newly-started session that has not yet built its critical relation cache entries (Jeff Davis) §
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Changes
Use the CLDR project's data to map Windows time zone names to IANA time zones (Tom Lane) § § §
When running on Windows, initdb attempts to set the new cluster's timezone parameter to the IANA time zone matching the system's prevailing time zone. We were using a mapping table that we'd generated years ago and updated only fitfully; unsurprisingly, it contained a number of errors as well as omissions of recently-added zones. It turns out that CLDR has been tracking the most appropriate mappings, so start using their data. This change will not affect any existing installation, only newly-initialized clusters.
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Changes
Update time zone data files to tzdata release 2021e for DST law changes in Fiji, Jordan, Palestine, and Samoa, plus historical corrections for Barbados, Cook Islands, Guyana, Niue, Portugal, and Tonga. (Tom Lane) §
Also, the Pacific/Enderbury zone has been renamed to Pacific/Kanton. Also, the following zones have been merged into nearby, more-populous zones whose clocks have agreed with them since 1970: Africa/Accra, America/Atikokan, America/Blanc-Sablon, America/Creston, America/Curacao, America/Nassau, America/Port_of_Spain, Antarctica/DumontDUrville, and Antarctica/Syowa. In all these cases, the previous zone name remains as an alias.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
A dump/restore is not required for those running 12.X.
However, if you are upgrading from a version earlier than 12.6, see Section E.17.
Changes
Fix mis-planning of repeated application of a projection step (Tom Lane) §
The planner could create an incorrect plan in cases where two ProjectionPaths were stacked on top of each other. The only known way to trigger that situation involves parallel sort operations, but there may be other instances. The result would be crashes or incorrect query results. Disclosure of server memory contents is also possible. (CVE-2021-3677)
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Changes
Disallow SSL renegotiation more completely (Michael Paquier) §
SSL renegotiation has been disabled for some time, but the server would still cooperate with a client-initiated renegotiation request. A maliciously crafted renegotiation request could result in a server crash (see OpenSSL issue CVE-2021-3449). Disable the feature altogether on OpenSSL versions that permit doing so, which are 1.1.0h and newer.
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Changes
Restore the Portal-level snapshot after COMMIT or ROLLBACK within a procedure (Tom Lane) § § § § §
This change fixes cases where an attempt to fetch a toasted value immediately after COMMIT/ROLLBACK would fail with errors like “no known snapshots” or “missing chunk number 0 for toast value”.
Some extensions may attempt to execute SQL code outside of any Portal. They are responsible for ensuring that an outer snapshot exists before doing so. Previously, not providing a snapshot might work or it might not; now it will consistently fail with “cannot execute SQL without an outer snapshot or portal”.
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Changes
Avoid misbehavior when persisting the output of a cursor that's reading a non-stable query (Tom Lane) § §
Previously, we'd always rewind and re-read the whole query result, possibly getting results different from the earlier execution, causing great confusion later. For a NO SCROLL cursor, we can fix this by only storing the not-yet-read portion of the query output, which is sufficient since a NO SCROLL cursor can't be backed up. Cursors with the SCROLL option remain at hazard, but that was already documented to be an unsafe option to use with a non-stable query. Make those documentation warnings stronger.
Also force NO SCROLL mode for the implicit cursor used by a PL/pgSQL FOR-over-query loop, to avoid this type of problem when persisting such a cursor during an intra-procedure commit.
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Changes
Reject SELECT ... GROUP BY GROUPING SETS (()) FOR UPDATE (Tom Lane) §
This should be disallowed, just as FOR UPDATE with a plain GROUP BY is disallowed, but the test for that failed to handle empty grouping sets correctly. The end result would be a null-pointer dereference in the executor.
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Changes
Reject cases where a query in WITH rewrites to just NOTIFY (Tom Lane) §
Such cases previously crashed.
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Changes
In numeric multiplication, round the result rather than failing if it would have more than 16383 digits after the decimal point (Dean Rasheed) §
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Changes
Fix corner-case errors and loss of precision when raising numeric values to very large powers (Dean Rasheed) § §
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Changes
Fix division-by-zero failure in to_char() with EEEE format and a numeric input value less than 10^(-1001) (Dean Rasheed) §
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Changes
Fix pg_size_pretty(bigint) to round negative values consistently with the way it rounds positive ones (and consistently with the numeric version) (Dean Rasheed, David Rowley) § §
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Changes
Make pg_filenode_relation(0, 0) return NULL rather than failing (Justin Pryzby) §
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Changes
Make ALTER EXTENSION lock the extension when adding or removing a member object (Tom Lane) §
The previous coding allowed ALTER EXTENSION ADD/DROP to occur concurrently with DROP EXTENSION, leading to a crash or corrupt catalog entries.
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Changes
Fix ALTER SUBSCRIPTION to reject an empty slot name (Japin Li) §
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Changes
When cloning a partitioned table's triggers to a new partition, ensure that their enabled status is copied (Álvaro Herrera) §
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Changes
Avoid alias conflicts in queries generated for REFRESH MATERIALIZED VIEW CONCURRENTLY (Tom Lane, Bharath Rupireddy) § §
This command failed on materialized views containing columns with certain names, notably mv and newdata.
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Changes
Fix PREPARE TRANSACTION to check correctly for conflicting session-lifespan and transaction-lifespan locks (Tom Lane) §
A transaction cannot be prepared if it has both session-lifespan and transaction-lifespan locks on the same advisory-lock ID value. This restriction was not fully checked, which could lead to a PANIC during PREPARE TRANSACTION.
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Changes
Fix misbehavior of DROP OWNED BY when the target role is listed more than once in an RLS policy (Tom Lane) §
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Changes
Skip unnecessary error tests when removing a role from an RLS policy during DROP OWNED BY (Tom Lane) §
Notably, this fixes some cases where it was necessary to be a superuser to use DROP OWNED BY.
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Changes
Disallow whole-row variables in GENERATED expressions (Tom Lane) §
Use of a whole-row variable clearly violates the rule that a generated column cannot depend on itself, so such cases have no well-defined behavior. The actual behavior frequently included a crash.
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Changes
Fix usage of tableoid in GENERATED expressions (Tom Lane) §
Some code paths failed to provide a valid value for this system column while evaluating a GENERATED expression.
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Changes
Don't store a “fast default” when adding a column to a foreign table (Andrew Dunstan) §
The fast default is useless since no local heap storage exists for such a table, but it confused subsequent operations. In addition to suppressing creation of such catalog entries in ALTER TABLE commands, adjust the downstream code to cope when one is incorrectly present.
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Changes
Allow index state flags to be updated transactionally (Michael Paquier, Andrey Lepikhov) § §
This avoids failures when dealing with index predicates that aren't really immutable. While that's not considered a supported case, the original reason for using a non-transactional update here is long gone, so we may as well change it.
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Changes
Avoid corrupting the plan cache entry when CREATE DOMAIN or ALTER DOMAIN appears in a cached plan (Tom Lane) §
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Changes
Make walsenders show their latest replication commands in pg_stat_activity (Tom Lane) §
Previously, a walsender would show its latest SQL command, which was confusing if it's now doing some replication operation instead. Now we show replication-protocol commands on the same footing as SQL commands.
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Changes
Make pg_settings.pending_restart show as true when the pertinent entry in postgresql.conf has been removed (Álvaro Herrera) §
pending_restart correctly showed the case where an entry that cannot be changed without a postmaster restart has been modified, but not where the entry had been removed altogether.
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Changes
Fix mis-planning of queries involving regular tables that are inheritance children of foreign tables (Amit Langote) §
SELECT FOR UPDATE and related commands would fail with assertion failures or “could not find junk column” errors in such cases.
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Changes
Fix corner-case failure of a new standby to follow a new primary (Dilip Kumar, Robert Haas) § § § § § §
Under a narrow combination of conditions, the standby could wind up trying to follow the wrong WAL timeline.
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Changes
Update minimum recovery point when WAL replay of a transaction abort record causes file truncation (Fujii Masao) §
File truncation is irreversible, so it's no longer safe to stop recovery at a point earlier than that record. The corresponding case for transaction commit was fixed years ago, but this one was overlooked.
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Changes
In walreceivers, avoid attempting catalog lookups after an error (Masahiko Sawada, Bharath Rupireddy) §
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Changes
Ensure that a standby server's startup process will respond to a shutdown signal promptly while waiting for WAL to arrive (Fujii Masao, Soumyadeep Chakraborty) §
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Changes
Correctly clear shared state after failing to become a member of a transaction commit group (Amit Kapila) §
Given the right timing, this could cause an assertion failure when some later session re-uses the same PGPROC object.
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Changes
Add locking to avoid reading incorrect relmapper data in the face of a concurrent write from another process (Heikki Linnakangas) § §
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Changes
Improve progress reporting for the sort phase of a parallel btree index build (Matthias van de Meent) §
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Changes
Improve checks for violations of replication protocol (Tom Lane) §
Logical replication workers frequently used Asserts to check for cases that could be triggered by invalid or out-of-order replication commands. This seems unwise, so promote these tests to regular error checks.
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Changes
Fix deadlock when multiple logical replication workers try to truncate the same table (Peter Smith, Haiying Tang) §
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Changes
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid leaving an invalid record-type hash table entry behind after an error (Sait Talha Nisanci) §
This could lead to later crashes or memory leakage.
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Changes
Fix plan cache reference leaks in some error cases in CREATE TABLE ... AS EXECUTE (Tom Lane) §
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Changes
Fix race condition in code for sharing tuple descriptors across parallel workers (Thomas Munro) §
Given the right timing, a crash could result.
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Changes
Fix possible race condition when releasing BackgroundWorkerSlots (Tom Lane) §
It's likely that this doesn't fix any observable bug on Intel hardware, but machines with weaker memory ordering rules could have problems.
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Changes
Fix latent crash in sorting code (Ronan Dunklau) § §
One code path could attempt to free a null pointer. The case appears unreachable in the core server's use of sorting, but perhaps it could be triggered by extensions.
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Changes
Prevent infinite loops in SP-GiST index insertion (Tom Lane) §
In the event that INCLUDE columns take up enough space to prevent a leaf index tuple from ever fitting on a page, the text_ops operator class would get into an infinite loop vainly trying to make the tuple fit. While pre-v11 versions don't have INCLUDE columns, back-patch this anti-looping fix to them anyway, as it seems like a good defense against bugs in operator classes.
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Changes
Ensure that SP-GiST index insertion can be terminated by a query cancel request (Tom Lane, Álvaro Herrera) § §
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Changes
Fix uninitialized-variable bug that could cause PL/pgSQL to act as though an INTO clause specified STRICT, even though it didn't (Tom Lane) §
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Changes
Don't abort the process for an out-of-memory failure in libpq's printing functions (Tom Lane) §
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Changes
In ecpg, allow the numeric value INT_MIN (usually -2147483648) to be converted to integer (John Naylor) §
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Changes
In psql and other client programs, avoid overrunning the ends of strings when dealing with invalidly-encoded data (Tom Lane) §
An incorrectly-encoded multibyte character near the end of a string could cause various processing loops to run past the string's terminating NUL, with results ranging from no detectable issue to a program crash, depending on what happens to be in the following memory. This is reminiscent of CVE-2006-2313, although these particular cases do not appear to have interesting security consequences.
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Changes
Fix pg_dump to correctly handle triggers on partitioned tables whose enabled status is different from their parent triggers' status (Justin Pryzby, Álvaro Herrera) §
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Changes
Avoid “invalid creation date in header” warnings observed when running pg_restore on an archive file created in a different time zone (Tom Lane) §
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Changes
Make pg_upgrade carry forward the old installation's oldestXID value (Bertrand Drouvot) §
Previously, the new installation's oldestXID was set to a value old enough to (usually) force immediate anti-wraparound autovacuuming. That's not desirable from a performance standpoint; what's worse, installations using large values of autovacuum_freeze_max_age could suffer unwanted forced shutdowns soon after an upgrade.
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Changes
Extend pg_upgrade to detect and warn about extensions that should be upgraded (Bruce Momjian) § §
A script file is now produced containing the ALTER EXTENSION UPDATE commands needed to bring extensions up to the versions that are considered default in the new installation.
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Changes
Avoid problems when switching pg_receivewal between compressed and non-compressed WAL storage (Michael Paquier) § §
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Changes
Fix contrib/postgres_fdw to work usefully with generated columns (Etsuro Fujita) §
postgres_fdw will now behave reasonably with generated columns, so long as a generated column in a foreign table represents a generated column in the remote table. IMPORT FOREIGN SCHEMA will now import generated columns that way by default.
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Changes
In contrib/postgres_fdw, avoid attempting catalog lookups after an error (Tom Lane) §
While this usually worked, it's not very safe since the error might have been one that made catalog access nonfunctional. A side effect of the fix is that messages about data conversion errors will now mention the query's table and column aliases (if used) rather than the true underlying name of a foreign table or column.
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Changes
Improve the isolation-test infrastructure (Tom Lane, Michael Paquier) § § § § § § §
Allow isolation test steps to be annotated to show the expected completion order. This allows getting stable results from otherwise-racy test cases, without the long delays that we previously used (not entirely successfully) to fend off race conditions. Allow non-quoted identifiers as isolation test session/step names (formerly, all such names had to be double-quoted). Detect and warn about unused steps in isolation tests. Improve display of query results in isolation tests. Remove isolationtester's “dry-run” mode. Remove memory leaks in isolationtester itself.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Reduce overhead of cache-clobber testing (Tom Lane) §
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Changes
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Make printf("%s", NULL) print (null) instead of crashing (Tom Lane) §
This should improve server robustness in corner cases, and it syncs our printf implementation with common libraries.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix incorrect log message when point-in-time recovery stops at a ROLLBACK PREPARED record (Simon Riggs) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Improve ALTER TABLE's messages for wrong-relation-kind errors (Kyotaro Horiguchi) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Clarify error messages referring to “non-negative” values (Bharath Rupireddy) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix configure to work with OpenLDAP 2.5, which no longer has a separate libldap_r library (Adrian Ho, Tom Lane) § § § §
If there is no libldap_r library, we now silently assume that libldap is thread-safe.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Add new make targets world-bin and install-world-bin (Andrew Dunstan) § §
These are the same as world and install-world respectively, except that they do not build or install the documentation.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix make rule for TAP tests (prove_installcheck) to work in PGXS usage (Andrew Dunstan) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Adjust JIT code to prepare for forthcoming LLVM API change (Thomas Munro, Andres Freund) §
LLVM 13 has made an incompatible API change that will cause crashing of our previous JIT compiler.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid assuming that strings returned by GSSAPI libraries are null-terminated (Tom Lane) §
The GSSAPI spec provides for a string pointer and length. It seems that in practice the next byte after the string is usually zero, so that our previous coding didn't actually fail; but we do have a report of AddressSanitizer complaints.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Enable building with GSSAPI on MSVC (Michael Paquier) § § §
Fix various incompatibilities with modern Kerberos builds.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
In MSVC builds, include --with-pgport in the set of configure options reported by pg_config, if it had been specified (Andrew Dunstan) § §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
A dump/restore is not required for those running 12.X.
However, if you are upgrading from a version earlier than 12.6, see Section E.17.
Changes
Prevent integer overflows in array subscripting calculations (Tom Lane) §
The array code previously did not complain about cases where an array's lower bound plus length overflows an integer. This resulted in later entries in the array becoming inaccessible (since their subscripts could not be written as integers), but more importantly it confused subsequent assignment operations. This could lead to memory overwrites, with ensuing crashes or unwanted data modifications. (CVE-2021-32027)
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix mishandling of “junk” columns in INSERT ... ON CONFLICT ... UPDATE target lists (Tom Lane) §
If the UPDATE list contains any multi-column sub-selects (which give rise to junk columns in addition to the results proper), the UPDATE path would end up storing tuples that include the values of the extra junk columns. That's fairly harmless in the short run, but if new columns are added to the table then the values would become accessible, possibly leading to malfunctions if they don't match the datatypes of the added columns.
In addition, in versions supporting cross-partition updates, a cross-partition update triggered by such a case had the reverse problem: the junk columns were removed from the target list, typically causing an immediate crash due to malfunction of the multi-column sub-select mechanism. (CVE-2021-32028)
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix possibly-incorrect computation of UPDATE ... RETURNING outputs for joined cross-partition updates (Amit Langote, Etsuro Fujita) § §
If an UPDATE for a partitioned table caused a row to be moved to another partition with a physically different row type (for example, one with a different set of dropped columns), computation of RETURNING results for that row could produce errors or wrong answers. No error is observed unless the UPDATE involves other tables being joined to the target table. (CVE-2021-32029)
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix adjustment of constraint deferrability properties in partitioned tables (Álvaro Herrera) §
When applied to a foreign-key constraint of a partitioned table, ALTER TABLE ... ALTER CONSTRAINT failed to adjust the DEFERRABLE and/or INITIALLY DEFERRED markings of the constraints and triggers of leaf partitions. This led to unexpected behavior of such constraints. After updating to this version, any misbehaving partitioned tables can be fixed by executing a new ALTER command to set the desired properties.
This change also disallows applying such an ALTER directly to the constraints of leaf partitions. The only supported case is for the whole partitioning hierarchy to have identical constraint properties, so such ALTERs must be applied at the partition root.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
When attaching a child table with ALTER TABLE ... INHERIT, insist that any generated columns in the parent be generated the same way in the child (Peter Eisentraut) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Forbid marking an identity column as nullable (Vik Fearing) §
GENERATED ... AS IDENTITY implies NOT NULL, so don't allow it to be combined with an explicit NULL specification.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Allow ALTER ROLE/DATABASE ... SET to set the role, session_authorization, and temp_buffers parameters (Tom Lane) §
Previously, over-eager validity checks might reject these commands, even if the values would have worked when used later. This created a command ordering hazard for dump/reload and upgrade scenarios.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ensure that REINDEX CONCURRENTLY preserves any statistics target that's been set for the index (Michael Paquier) § §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix COMMIT AND CHAIN to work correctly when the current transaction has live savepoints (Fujii Masao) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix bug with coercing the result of a COLLATE expression to a non-collatable type (Tom Lane) §
This led to a parse tree in which the COLLATE appears to be applied to a non-collatable value. While that normally has no real impact (since COLLATE has no effect at runtime), it was possible to construct views that would be rejected during dump/reload.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix use-after-free bug in saving tuples for AFTER triggers (Amit Langote) §
This could cause crashes in some situations.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Disallow calling window functions and procedures via the “fast path” wire protocol message (Tom Lane) §
Only plain functions are supported here. While trying to call an aggregate function failed already, calling a window function would crash, and calling a procedure would work only if the procedure did no transaction control.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix to_char()'s handling of Roman-numeral month format codes with negative intervals (Julien Rouhaud) §
Previously, such cases would usually cause a crash.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Check that the argument of pg_import_system_collations() is a valid schema OID (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix use of uninitialized value while parsing an \{ quantifier in a BRE-mode regular expression (Tom Lane) §m,n\}
This error could cause the quantifier to act non-greedy, that is behave like an { quantifier would do in full regular expressions.m,n}?
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Don't ignore system columns when estimating the number of groups using extended statistics (Tomas Vondra) §
This led to strange estimates for queries such as SELECT ... GROUP BY a, b, ctid.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid divide-by-zero when estimating selectivity of a regular expression with a very long fixed prefix (Tom Lane) §
This typically led to a NaN selectivity value, causing assertion failures or strange planner behavior.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix access-off-the-end-of-the-table error in BRIN index bitmap scans (Tomas Vondra) §
If the page range size used by a BRIN index isn't a power of two, there were corner cases in which a bitmap scan could try to fetch pages past the actual end of the table, leading to “could not open file” errors.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid incorrect timeline change while recovering uncommitted two-phase transactions from WAL (Soumyadeep Chakraborty, Jimmy Yih, Kevin Yeap) §
This error could lead to subsequent WAL records being written under the wrong timeline ID, leading to consistency problems, or even complete failure to be able to restart the server, later on.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ensure that locks are released while shutting down a standby server's startup process (Fujii Masao) §
When a standby server is shut down while still in recovery, some locks might be left held. This causes assertion failures in debug builds; it's unclear whether any serious consequence could occur in production builds.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix crash when a logical replication worker does ALTER SUBSCRIPTION REFRESH (Peter Smith) §
The core code won't do this, but a replica trigger could.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ensure we default to wal_sync_method = fdatasync on recent FreeBSD (Thomas Munro) §
FreeBSD 13 supports open_datasync, which would normally become the default choice. However, it's unclear whether that is actually an improvement for Postgres, so preserve the existing default for now.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Pass the correct trigger OID to object post-alter hooks during ALTER CONSTRAINT (Álvaro Herrera) §
When updating trigger properties during ALTER CONSTRAINT, the post-alter hook was told that we are updating a trigger, but the constraint's OID was passed instead of the trigger's.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ensure we finish cleaning up when interrupted while detaching a DSM segment (Thomas Munro) §
This error could result in temporary files not being cleaned up promptly after a parallel query.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix memory leak while initializing server's SSL parameters (Michael Paquier) §
This is ordinarily insignificant, but if the postmaster is repeatedly sent SIGHUP signals, the leak can build up over time.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix failure when a PL/pgSQL DO block makes use of both composite-type variables and transaction control (Tom Lane) §
Previously, such cases led to errors about leaked tuple descriptors.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Prevent infinite loop in libpq if a ParameterDescription message with a corrupt length is received (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
When initdb prints instructions about how to start the server, make the path shown for pg_ctl use backslash separators on Windows (Nitin Jadhav) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix psql to restore the previous behavior of \connect service= (Tom Lane) §something
A previous bug fix caused environment variables (such as PGPORT) to override entries in the service file in this context. Restore the previous behavior, in which the priority is the other way around.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix psql's ON_ERROR_ROLLBACK feature to handle COMMIT AND CHAIN commands correctly (Arthur Nascimento) §
Previously, this case failed with “savepoint "pg_psql_temporary_savepoint" does not exist”.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix race condition in detection of file modification by psql's \e and related commands (Laurenz Albe) §
A very fast typist could fool the code's file-timestamp-based detection of whether the temporary edit file was changed.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix pg_dump's dumping of generated columns in partitioned tables (Peter Eisentraut) §
A fix introduced in the previous minor release should not be applied to partitioned tables, only traditionally-inherited tables.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix missed file version check in pg_restore (Tom Lane) §
When reading a custom-format archive from a non-seekable source, pg_restore neglected to check the archive version. If it was fed a newer archive version than it can support, it would fail messily later on.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Add some more checks to pg_upgrade for user tables containing non-upgradable data types (Tom Lane) §
Fix detection of some cases where a non-upgradable data type is embedded within a container type (such as an array or range). Also disallow upgrading when user tables contain columns of system-defined composite types, since those types' OIDs are not stable across versions.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix incorrect progress-reporting calculation in pg_checksums (Shinya Kato) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix pg_waldump to count XACT records correctly when generating per-record statistics (Kyotaro Horiguchi) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix contrib/amcheck to not complain about the tuple flags HEAP_XMAX_LOCK_ONLY and HEAP_KEYS_UPDATED both being set (Julien Rouhaud) §
This is a valid state after SELECT FOR UPDATE.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Adjust VPATH build rules to support recent Oracle Developer Studio compiler versions (Noah Misch) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix testing of PL/Python for Python 3 on Solaris (Noah Misch) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
A dump/restore is not required for those running 12.X.
However, see the second and third changelog items below, which describe cases in which reindexing indexes after the upgrade may be advisable.
Also, if you are upgrading from a version earlier than 12.2, see Section E.21.
Changes
Fix information leakage in constraint-violation error messages (Heikki Linnakangas) §
If an UPDATE command attempts to move a row to a different partition but finds that it violates some constraint on the new partition, and the columns in that partition are in different physical positions than in the parent table, the error message could reveal the contents of columns that the user does not have SELECT privilege on. (CVE-2021-3393)
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix incorrect detection of concurrent page splits while inserting into a GiST index (Heikki Linnakangas) §
Concurrent insertions could lead to a corrupt index with entries placed in the wrong pages. It's recommended to reindex any GiST index that's been subject to concurrent insertions.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix CREATE INDEX CONCURRENTLY to wait for concurrent prepared transactions (Andrey Borodin) §
At the point where CREATE INDEX CONCURRENTLY waits for all concurrent transactions to complete so that it can see rows they inserted, it must also wait for all prepared transactions to complete, for the same reason. Its failure to do so meant that rows inserted by prepared transactions might be omitted from the new index, causing queries relying on the index to miss such rows. In installations that have enabled prepared transactions (max_prepared_transactions > 0), it's recommended to reindex any concurrently-built indexes in case this problem occurred when they were built.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid crash when a CALL or DO statement that performs a transaction rollback is executed via extended query protocol (Thomas Munro, Tom Lane) §
In PostgreSQL 13, this case reliably caused a null-pointer dereference. In earlier versions the bug seems to have no visible symptoms, but it's not quite clear that it could never cause a problem.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix partition pruning logic to handle asymmetric hash partition sets (Tom Lane) §
If a hash-partitioned table has unequally-sized partitions (that is, varying modulus values), or it lacks partitions for some remainder values, then the planner's pruning logic could mistakenly conclude that some partitions don't need to be scanned, leading to failure to find rows that the query should find.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid incorrect results when WHERE CURRENT OF is applied to a cursor whose plan contains a MergeAppend node (Tom Lane) §
This case is unsupported (in general, a cursor using ORDER BY is not guaranteed to be simply updatable); but the code previously did not reject it, and could silently give false matches.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix crash when WHERE CURRENT OF is applied to a cursor whose plan contains a custom scan node (David Geier) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix planner's mishandling of placeholders whose evaluation should be delayed by an outer join (Tom Lane) §
This occurs in particular with trivial subqueries containing lateral references to outer-join outputs. The mistake could result in a malformed plan. The known cases trigger a “failed to assign all NestLoopParams to plan nodes” error, but other symptoms may be possible.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix planner's handling of placeholders during removal of useless RESULT RTEs (Tom Lane) §
This oversight could lead to “no relation entry for relid N” planner errors.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix planner's handling of a placeholder that is computed at some join level and used only at that same level (Tom Lane) §
This oversight could lead to “failed to build any N-way joins” planner errors.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Be more careful about whether index AMs support mark/restore (Andrew Gierth) §
This prevents errors about missing support functions in rare edge cases.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Adjust settings to make it more difficult to run out of DSM slots during heavy usage of parallel queries (Thomas Munro) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix overestimate of the amount of shared memory needed for parallel queries (Takayuki Tsunakawa) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix ALTER DEFAULT PRIVILEGES to handle duplicated arguments safely (Michael Paquier) §
Duplicate role or schema names within the same command could lead to “tuple already updated by self” errors or unique-constraint violations.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Flush ACL-related caches when pg_authid changes (Noah Misch) §
This change ensures that permissions-related decisions will promptly reflect the results of ALTER ROLE ... [NO] INHERIT.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Prevent misprocessing of ambiguous CREATE TABLE LIKE clauses (Tom Lane) §
A LIKE clause is re-examined after initial creation of the new table, to handle importation of indexes and such. It was possible for this re-examination to find a different table of the same name, causing unexpected behavior; one example is where the new table is a temporary table of the same name as the LIKE target.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Rearrange order of operations in CREATE TABLE LIKE so that indexes are cloned before building foreign key constraints (Tom Lane) §
This fixes the case where a self-referential foreign key constraint declared in the outer CREATE TABLE depends on an index that's coming from the LIKE clause.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Disallow CREATE STATISTICS on system catalogs (Tomas Vondra) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Disallow converting an inheritance child table to a view (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ensure that disk space allocated for a dropped relation is released promptly at commit (Thomas Munro) §
Previously, if the dropped relation spanned multiple 1GB segments, only the first segment was truncated immediately. Other segments were simply unlinked, which doesn't authorize the kernel to release the storage so long as any other backends still have the files open.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Prevent dropping a tablespace that is referenced by a partitioned relation, but is not used for any actual storage (Álvaro Herrera) §
Previously this was allowed, but subsequent operations on the partitioned relation would fail.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix progress reporting for CLUSTER (Matthias van de Meent) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix handling of backslash-escaped multibyte characters in COPY FROM (Heikki Linnakangas) §
A backslash followed by a multibyte character was not handled correctly. In some client character encodings, this could lead to misinterpreting part of a multibyte character as a field separator or end-of-copy-data marker.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid preallocating executor hash tables in EXPLAIN without ANALYZE (Alexey Bashtanov) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix recently-introduced race conditions in LISTEN/NOTIFY queue handling (Tom Lane) §
A newly-listening backend could attempt to read SLRU pages that were in process of being truncated, possibly causing an error.
The queue tail pointer could become set to a value that's not equal to the queue position of any backend, resulting in effective disabling of the queue truncation logic. Continued use of NOTIFY then led to queue-fill warnings, and eventually to inability to send any more notifies until the server is restarted.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Allow the jsonb concatenation operator to handle all combinations of JSON data types (Tom Lane) §
We can concatenate two JSON objects or two JSON arrays. Handle other cases by wrapping non-array inputs in one-element arrays, then performing an array concatenation. Previously, some combinations of inputs followed this rule but others arbitrarily threw an error.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix use of uninitialized value while parsing a * quantifier in a BRE-mode regular expression (Tom Lane) §
This error could cause the quantifier to act non-greedy, that is behave like a *? quantifier would do in full regular expressions.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix numeric power() for the case where the exponent is exactly INT_MIN (-2147483648) (Dean Rasheed) § §
Previously, a result with no significant digits was produced.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix integer-overflow cases in substring() functions (Tom Lane, Pavel Stehule) §
If the specified starting index and length overflow an integer when added together, substring() misbehaved, either throwing a bogus “negative substring length” error for a case that should succeed, or failing to complain that a negative length is negative (and instead returning the whole string, in most cases).
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Prevent possible data loss from incorrect detection of the wraparound point of an SLRU log (Noah Misch) §
The wraparound point typically falls in the middle of a page, which must be rounded off to a page boundary, and that was not done correctly. No issue could arise unless an installation had gotten to within one page of SLRU overflow, which is unlikely in a properly-functioning system. If this did happen, it would manifest in later “apparent wraparound” or “could not access status of transaction” errors.
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Changes
Fix memory leak in walsender processes while sending new snapshots for logical decoding (Amit Kapila) §
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Changes
Fix walsender to accept additional commands after terminating replication (Jeff Davis) §
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Changes
Ensure detection of deadlocks between hot standby backends and the startup (WAL-application) process (Fujii Masao) §
The startup process did not run the deadlock detection code, so that in situations where the startup process is last to join a circular wait situation, the deadlock might never be recognized.
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Changes
Fix possible failure to detect recovery conflicts while deleting an index entry that references a HOT chain (Peter Geoghegan) § §
The code failed to traverse the HOT chain and might thus compute a too-old XID horizon, which could lead to incorrect conflict processing in hot standby. The practical impact of this bug is limited; in most cases the correct XID horizon would be found anyway from nearby operations.
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Changes
Ensure that a nonempty value of krb_server_keyfile always overrides any setting of KRB5_KTNAME in the server's environment (Tom Lane) §
Previously, which setting took precedence depended on whether the client requests GSS encryption.
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Changes
In server log messages about failing to match connections to pg_hba.conf entries, include details about whether GSS encryption has been activated (Kyotaro Horiguchi, Tom Lane) §
This is relevant data if hostgssenc or hostnogssenc entries exist.
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Changes
Fix assorted issues in server's support for GSS encryption (Tom Lane) §
Remove pointless restriction that only GSS authentication can be used on a GSS-encrypted connection. Add GSS encryption information to connection-authorized log messages. Include GSS-related space when computing the required size of shared memory (this omission could have caused problems with very high max_connections settings). Avoid possible infinite recursion when reporting an unrecoverable GSS encryption error.
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Changes
Ensure that unserviced requests for background workers are cleaned up when the postmaster begins a “smart” or “fast” shutdown sequence (Tom Lane) §
Previously, there was a race condition whereby a child process that had requested a background worker just before shutdown could wait indefinitely, preventing shutdown from completing.
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Changes
Fix portability problem in parsing of recovery_target_xid values (Michael Paquier) §
The target XID is potentially 64 bits wide, but it was parsed with strtoul(), causing misbehavior on platforms where long is 32 bits (such as Windows).
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Changes
Avoid trying to use parallel index build in a standalone backend (Yulin Pei) §
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Changes
Allow index AMs to support included columns without necessarily supporting multiple key columns (Tom Lane) §
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Changes
Avoid assertion failure during parallel aggregation of an aggregate with a non-strict deserialization function (Andrew Gierth) §
No such aggregate functions exist in core PostgreSQL, but some extensions such as PostGIS provide some. The mistake is harmless anyway in a non-assert build.
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Changes
Avoid assertion failure in pg_get_functiondef() when examining a function with a TRANSFORM option (Tom Lane) §
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Changes
Fix data structure misallocation in PL/pgSQL's CALL statement (Tom Lane) § §
A CALL in a PL/pgSQL procedure, to another procedure that has OUT parameters, would fail if the called procedure did a COMMIT or ROLLBACK.
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Changes
In libpq, do not skip trying SSL after GSS encryption (Tom Lane) §
If we successfully made a GSS-encrypted connection, but then failed during authentication, we would fall back to an unencrypted connection rather than next trying an SSL-encrypted connection. This could lead to unexpected connection failure, or to silently getting an unencrypted connection where an encrypted one is expected. Fortunately, GSS encryption could only succeed if both client and server hold valid tickets in the same Kerberos infrastructure. It seems unlikely for that to be true in an environment that requires SSL encryption instead.
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Changes
In psql, re-allow including a password in a connection_string argument of a \connect command (Tom Lane) §
This used to work, but a recent bug fix caused the password to be ignored (resulting in prompting for a password).
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Changes
In psql's \d commands, don't truncate the display of column default values (Tom Lane) §
Formerly, they were arbitrarily truncated at 128 characters.
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Changes
Fix assorted bugs in psql's \help command (Kyotaro Horiguchi, Tom Lane) §
\help with two argument words failed to find a command description using only the first word, for example \help reset all should show the help for RESET but did not. Also, \help often failed to invoke the pager when it should. It also leaked memory.
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Changes
Fix pg_dump's dumping of inherited generated columns (Peter Eisentraut) §
The previous behavior resulted in (harmless) errors during restore.
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Changes
In pg_dump, ensure that the restore script runs ALTER PUBLICATION ADD TABLE commands as the owner of the publication, and similarly runs ALTER INDEX ATTACH PARTITION commands as the owner of the partitioned index (Tom Lane) § §
Previously, these commands would be run by the role that started the restore script; which will usually work, but in corner cases that role might not have adequate permissions.
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Changes
Fix pg_dump to handle WITH GRANT OPTION in an extension's initial privileges (Noah Misch) §
If an extension's script creates an object and grants privileges on it with grant option, then later the user revokes such privileges, pg_dump would generate incorrect SQL for reproducing the situation. (Few if any extensions do this today.)
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Changes
In pg_rewind, ensure that all WAL is accounted for when rewinding a standby server (Ian Barwick, Heikki Linnakangas) § § §
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Changes
In pgbench, disallow a digit as the first character of a variable name (Fabien Coelho) §
This prevents trying to substitute variables into timestamp literal values, which may contain strings like 12:34.
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Changes
Report the correct database name in connection failure error messages from some client programs (Álvaro Herrera) §
If the database name was defaulted rather than given on the command line, pg_dumpall, pgbench, oid2name, and vacuumlo would produce misleading error messages after a connection failure.
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Changes
Fix memory leak in contrib/auto_explain (Japin Li) §
Memory consumed while producing the EXPLAIN output was not freed until the end of the current transaction (for a top-level statement) or the end of the surrounding statement (for a nested statement). This was particularly a problem with log_nested_statements enabled.
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Changes
In contrib/postgres_fdw, avoid leaking open connections to remote servers when a user mapping or foreign server object is dropped (Bharath Rupireddy) §
Open connections that depend on a dropped user mapping or foreign server can no longer be referenced, but formerly they were kept around anyway for the duration of the local session.
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Changes
In contrib/pgcrypto, check for error returns from OpenSSL's EVP functions (Michael Paquier) §
We do not really expect errors here, but this change silences warnings from static analysis tools.
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Changes
Make contrib/pg_prewarm more robust when the cluster is shut down before prewarming is complete (Tom Lane) §
Previously, autoprewarm would rewrite its status file with only the block numbers that it had managed to load so far, thus perhaps largely disabling the prewarm functionality in the next startup. Instead, suppress status file updates until the initial loading pass is complete.
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Changes
In contrib/pg_trgm's GiST index support, avoid crash in the rare case that picksplit is called on exactly two index items (Andrew Gierth, Alexander Korotkov) §
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Changes
Fix miscalculation of timeouts in contrib/pg_prewarm and contrib/postgres_fdw (Alexey Kondratov, Tom Lane) §
The main loop in contrib/pg_prewarm's autoprewarm parent process underestimated its desired sleep time by a factor of 1000, causing it to consume much more CPU than intended. When waiting for a result from a remote server, contrib/postgres_fdw overestimated the desired timeout by a factor of 1000 (though this error had been mitigated by imposing a clamp to 60 seconds).
Both of these errors stemmed from incorrectly converting seconds-and-microseconds to milliseconds. Introduce a new API TimestampDifferenceMilliseconds() to make it easier to get this right in the future.
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Changes
Improve configure's heuristics for selecting PG_SYSROOT on macOS (Tom Lane) § §
The new method is more likely to produce desirable results when Xcode is newer than the underlying operating system. Choosing a sysroot that does not match the OS version may result in nonfunctional executables.
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Changes
While building on macOS, specify -isysroot in link steps as well as compile steps (James Hilliard) §
This likewise improves the results when Xcode is out of sync with the operating system.
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Changes
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix potential mishandling of references to boolean variables in JIT expression compilation (Andres Freund) §
No field reports attributable to this have been seen, but it seems likely that it could cause problems on some architectures.
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Changes
Fix compile failure with ICU 68 and later (Tom Lane) §
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Changes
Avoid memcpy() with a NULL source pointer and zero count during partitioned index creation (Álvaro Herrera) §
While such a call is not known to cause problems in itself, some compilers assume that the arguments of memcpy() are never NULL, which could result in incorrect optimization of nearby code.
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Changes
Update time zone data files to tzdata release 2021a for DST law changes in Russia (Volgograd zone) and South Sudan, plus historical corrections for Australia, Bahamas, Belize, Bermuda, Ghana, Israel, Kenya, Nigeria, Palestine, Seychelles, and Vanuatu. (Tom Lane) §
Notably, the Australia/Currie zone has been corrected to the point where it is identical to Australia/Hobart.
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A dump/restore is not required for those running 12.X.
However, if you are upgrading from a version earlier than 12.2, see Section E.21.
Changes
Block DECLARE CURSOR ... WITH HOLD and firing of deferred triggers within index expressions and materialized view queries (Noah Misch) §
This is essentially a leak in the “security restricted operation” sandbox mechanism. An attacker having permission to create non-temporary SQL objects could parlay this leak to execute arbitrary SQL code as a superuser.
The PostgreSQL Project thanks Etienne Stalmans for reporting this problem. (CVE-2020-25695)
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Changes
Fix usage of complex connection-string parameters in pg_dump, pg_restore, clusterdb, reindexdb, and vacuumdb (Tom Lane) § §
The -d parameter of pg_dump and pg_restore, or the --maintenance-db parameter of the other programs mentioned, can be a “connection string” containing multiple connection parameters rather than just a database name. In cases where these programs need to initiate additional connections, such as parallel processing or processing of multiple databases, the connection string was forgotten and just the basic connection parameters (database name, host, port, and username) were used for the additional connections. This could lead to connection failures if the connection string included any other essential information, such as non-default SSL or GSS parameters. Worse, the connection might succeed but not be encrypted as intended, or be vulnerable to man-in-the-middle attacks that the intended connection parameters would have prevented. (CVE-2020-25694)
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Changes
When psql's \connect command re-uses connection parameters, ensure that all non-overridden parameters from a previous connection string are re-used (Tom Lane) §
This avoids cases where reconnection might fail due to omission of relevant parameters, such as non-default SSL or GSS options. Worse, the reconnection might succeed but not be encrypted as intended, or be vulnerable to man-in-the-middle attacks that the intended connection parameters would have prevented. This is largely the same problem as just cited for pg_dump et al, although psql's behavior is more complex since the user may intentionally override some connection parameters. (CVE-2020-25694)
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Changes
Prevent psql's \gset command from modifying specially-treated variables (Noah Misch) §
\gset without a prefix would overwrite whatever variables the server told it to. Thus, a compromised server could set specially-treated variables such as PROMPT1, giving the ability to execute arbitrary shell code in the user's session.
The PostgreSQL Project thanks Nick Cleaton for reporting this problem. (CVE-2020-25696)
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Changes
Prevent possible data loss from concurrent truncations of SLRU logs (Noah Misch) § §
This rare problem would manifest in later “apparent wraparound” or “could not access status of transaction” errors.
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Changes
Ensure that SLRU directories are properly fsync'd during checkpoints (Thomas Munro) §
This prevents possible data loss in a subsequent operating system crash.
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Changes
Fix ALTER ROLE for users with the BYPASSRLS attribute (Tom Lane, Stephen Frost) §
The BYPASSRLS attribute is only allowed to be changed by superusers, but other ALTER ROLE operations, such as password changes, should be allowed with only ordinary permission checks. The previous coding erroneously restricted all changes on such a role to superusers.
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Changes
Ensure that ALTER TABLE ONLY ... ENABLE/DISABLE TRIGGER does not recurse to child tables (Álvaro Herrera) §
Previously the ONLY flag was ignored.
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Changes
Avoid unnecessary recursion to partitions in ALTER TABLE SET NOT NULL, when the target column is already marked NOT NULL (Tom Lane) §
This avoids a potential deadlock in parallel pg_restore.
Changes
Fix handling of expressions in CREATE TABLE LIKE with inheritance (Tom Lane) § §
If a CREATE TABLE command uses both LIKE and traditional inheritance, column references in CHECK constraints and expression indexes that came from a LIKE parent table tended to get mis-numbered, resulting in wrong answers and/or bizarre error messages. The same could happen in GENERATED expressions, in branches that have that feature.
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Changes
Disallow DROP INDEX CONCURRENTLY on a partitioned table (Álvaro Herrera, Michael Paquier) §
This case failed anyway, but with a confusing error message.
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Changes
Allow LOCK TABLE to succeed on a self-referential view (Tom Lane) §
It previously threw an error complaining about infinite recursion, but there seems no need to disallow the case.
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Changes
Retain statistics about an index across REINDEX CONCURRENTLY (Michael Paquier, Fabrízio de Royes Mello) §
Non-concurrent reindexing has always preserved such statistics.
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Changes
Fix incorrect progress reporting from REINDEX CONCURRENTLY (Matthias van de Meent, Michael Paquier) §
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Changes
Ensure that GENERATED columns are updated when the column(s) they depend on are updated via a rule or an updatable view (Tom Lane) §
This fix also takes care of possible failure to fire a column-specific trigger in such cases.
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Changes
Recheck default partition constraints while routing an inserted or updated tuple to the correct partition (Amit Langote, Álvaro Herrera) §
This fixes race conditions when partitions are added concurrently with the insertion.
Changes
Fix failures with collation-dependent partition bound expressions (Tom Lane) §
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Changes
Support hashing of text arrays (Peter Eisentraut) §
Array hashing failed if the array element type is collatable. Notably, this prevented using hash partitioning with a text array column as partition key.
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Changes
Fix off-by-one conversion of negative years to BC dates in to_date() and to_timestamp() (Dar Alathar-Yemen, Tom Lane) §
Also, arrange for the combination of a negative year and an explicit “BC” marker to cancel out and produce AD.
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Changes
Ensure that standby servers will archive WAL timeline history files when archive_mode is set to always (Grigory Smolkin, Fujii Masao) §
This oversight could lead to failure of subsequent PITR recovery attempts.
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Changes
Fix “cache lookup failed for relation 0” failures in logical replication workers (Tom Lane) §
The real-world impact is small, since the failure is unlikely, and if it does happen the worker would just exit and be restarted.
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Changes
Prevent logical replication workers from sending redundant ping requests (Tom Lane) §
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Changes
During “smart” shutdown, don't terminate background processes until all client (foreground) sessions are done (Tom Lane) §
The previous behavior broke parallel query processing, since the postmaster would terminate parallel workers and refuse to launch any new ones. It also caused autovacuum to cease functioning, which could have dire long-term effects if the surviving client sessions make a lot of data changes.
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Changes
Avoid recursive consumption of stack space while processing signals in the postmaster (Tom Lane) §
Heavy use of parallel processing has been observed to cause postmaster crashes due to too many concurrent signals requesting creation of a parallel worker process.
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Changes
Avoid running atexit handlers when exiting due to SIGQUIT (Kyotaro Horiguchi, Tom Lane) § §
Most server processes followed this practice already, but the archiver process was overlooked. Backends that were still waiting for a client startup packet got it wrong, too.
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Changes
Avoid misoptimization of subquery qualifications that reference apparently-constant grouping columns (Tom Lane) §
A “constant” subquery output column isn't really constant if it is a grouping column that appears in only some of the grouping sets.
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Changes
Fix possible crash when considering partition-wise joins during GEQO planning (Tom Lane) §
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Changes
Avoid failure when SQL function inlining changes the shape of a potentially-hashable subplan comparison expression (Tom Lane) §
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Changes
While building or re-building an index, tolerate the appearance of new HOT chains due to concurrent updates (Anastasia Lubennikova, Álvaro Herrera) § §
This oversight could lead to “failed to find parent tuple for heap-only tuple” errors.
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Changes
Fix failure of parallel B-tree index scans when the index condition is unsatisfiable (James Hunter) §
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Changes
Ensure that data is detoasted before being inserted into a BRIN index (Tomas Vondra) §
Index entries are not supposed to contain out-of-line TOAST pointers, but BRIN didn't get that memo. This could lead to errors like “missing chunk number 0 for toast value NNN”. (If you are faced with such an error from an existing index, REINDEX should be enough to fix it.)
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Changes
Handle concurrent desummarization correctly during BRIN index scans (Alexander Lakhin, Álvaro Herrera) §
Previously, if a page range was desummarized at just the wrong time, an index scan might falsely raise an error indicating index corruption.
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Changes
Fix rare “lost saved point in index” errors in scans of multicolumn GIN indexes (Tom Lane) §
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Changes
Fix buffered GiST index builds to work when the index has included columns (Pavel Borisov) §
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Changes
Fix unportable use of getnameinfo() in pg_hba_file_rules view (Tom Lane) §
On FreeBSD 11, and possibly other platforms, the view's address and netmask columns were always null due to this error.
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Changes
Avoid crash if debug_query_string is NULL when starting a parallel worker (Noah Misch) §
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Changes
Fix use-after-free hazard when an event trigger monitors an ALTER TABLE operation (Jehan-Guillaume de Rorthais) §
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Changes
Avoid failures when a BEFORE ROW UPDATE trigger returns the “old” row of a table having dropped or “missing” columns (Amit Langote, Tom Lane) § §
This method of suppressing an update could result in crashes, unexpected CHECK constraint failures, or incorrect RETURNING output, because “missing” columns would read as NULLs for those purposes. (A column is “missing” for this purpose if it was added by ALTER TABLE ADD COLUMN with a non-NULL, but constant, default value.) Dropped columns could cause trouble as well.
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Changes
Fix incorrect error message about inconsistent moving-aggregate data types (Jeff Janes) §
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Changes
Avoid lockup when a parallel worker reports a very long error message (Vignesh C) §
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Changes
Avoid unnecessary failure when transferring very large payloads through shared memory queues (Markus Wanner) §
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Changes
Fix incorrect handling of template function attributes in JIT code generation (Andres Freund) § §
This has been shown to cause crashes on s390x, and very possibly there are other cases on other platforms.
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Changes
Fix relation cache memory leaks with RLS policies (Tom Lane) §
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Changes
Fix edge-case memory leak in index_get_partition() (Justin Pryzby) §
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Changes
Fix small memory leak when SIGHUP processing decides that a new GUC variable value cannot be applied without a restart (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix memory leaks in PL/pgsql's CALL processing (Pavel Stehule, Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Make libpq support arbitrary-length lines in .pgpass files (Tom Lane) § §
This is mostly useful to allow using very long security tokens as passwords.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
In libpq for Windows, call WSAStartup() once per process and WSACleanup() not at all (Tom Lane, Alexander Lakhin) §
Previously, libpq invoked WSAStartup() at connection start and WSACleanup() at connection cleanup. However, it appears that calling WSACleanup() can interfere with other program operations; notably, we have observed rare failures to emit expected output to stdout. There appear to be no ill effects from omitting the call, so do that. (This also eliminates a performance issue from repeated DLL loads and unloads when a program performs a series of database connections.)
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix ecpg library's per-thread initialization logic for Windows (Tom Lane, Alexander Lakhin) §
Multi-threaded ecpg applications could suffer rare misbehavior due to incorrect locking.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
On Windows, make psql read the output of a backtick command in text mode, not binary mode (Tom Lane) §
This ensures proper handling of newlines.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ensure that pg_dump collects per-column information about extension configuration tables (Fabrízio de Royes Mello, Tom Lane) § §
Failure to do this led to crashes when specifying --inserts, or underspecified (though usually correct) COPY commands when using COPY to reload the tables' data.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ensure that parallel pg_restore processes foreign keys referencing partitioned tables in the correct order (Álvaro Herrera) §
Previously, it might try to restore a foreign key constraint before the required indexes were all in place, leading to an error.
Changes
Make pg_upgrade check for pre-existence of tablespace directories in the target cluster (Bruce Momjian) § §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix potential memory leak in contrib/pgcrypto (Michael Paquier) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Add check for an unlikely failure case in contrib/pgcrypto (Daniel Gustafsson) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix recently-added timetz test case so it works when the USA is not observing daylight savings time (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Update time zone data files to tzdata release 2020d for DST law changes in Fiji, Morocco, Palestine, the Canadian Yukon, Macquarie Island, and Casey Station (Antarctica); plus historical corrections for France, Hungary, Monaco, and Palestine. (Tom Lane) § §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Sync our copy of the timezone library with IANA tzcode release 2020d (Tom Lane) § §
This absorbs upstream's change of zic's default output option from “fat” to “slim”. That's just cosmetic for our purposes, as we continue to select the “fat” mode in pre-v13 branches. This change also ensures that strftime() does not change errno unless it fails.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
A dump/restore is not required for those running 12.X.
However, if you are upgrading from a version earlier than 12.2, see Section E.21.
Changes
Set a secure search_path in logical replication walsenders and apply workers (Noah Misch) § §
A malicious user of either the publisher or subscriber database could potentially cause execution of arbitrary SQL code by the role running replication, which is often a superuser. Some of the risks here are equivalent to those described in CVE-2018-1058, and are mitigated in this patch by ensuring that the replication sender and receiver execute with empty search_path settings. (As with CVE-2018-1058, that change might cause problems for under-qualified names used in replicated tables' DDL.) Other risks are inherent in replicating objects that belong to untrusted roles; the most we can do is document that there is a hazard to consider. (CVE-2020-14349)
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Make contrib modules' installation scripts more secure (Tom Lane) §
Attacks similar to those described in CVE-2018-1058 could be carried out against an extension installation script, if the attacker can create objects in either the extension's target schema or the schema of some prerequisite extension. Since extensions often require superuser privilege to install, this can open a path to obtaining superuser privilege. To mitigate this risk, be more careful about the search_path used to run an installation script; disable check_function_bodies within the script; and fix catalog-adjustment queries used in some contrib modules to ensure they are secure. Also provide documentation to help third-party extension authors make their installation scripts secure. This is not a complete solution; extensions that depend on other extensions can still be at risk if installed carelessly. (CVE-2020-14350)
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix edge cases in partition pruning (Etsuro Fujita, Dmitry Dolgov) § §
When there are multiple partition key columns, generation of pruning tests could misbehave if some columns had no constraining WHERE clauses or multiple constraining clauses. This could lead to server crashes, incorrect query results, or assertion failures.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix construction of parameterized BitmapAnd and BitmapOr index scans on the inside of partition-wise nestloop joins (Tom Lane) §
A plan in which such a scan needed to use a value from the outside of the join would usually crash at execution.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix incorrect plan execution when a partitioned table is subject to both static and run-time partition pruning in the same query, and a new partition is added concurrently with the query (Amit Langote, Tom Lane) §
Changes
In logical replication walsender, fix failure to send feedback messages after sending a keepalive message (Álvaro Herrera) §
This is a relatively minor problem when using built-in logical replication, because the built-in walreceiver will send a feedback reply (which clears the incorrect state) fairly frequently anyway. But with some other replication systems, such as pglogical, it causes significant performance issues.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix firing of column-specific UPDATE triggers in logical replication subscribers (Tom Lane) §
The code neglected to account for the possibility of column numbers being different between the publisher and subscriber tables, so that if those were indeed different, wrong decisions might be made about which triggers to fire.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Update oldest xmin and LSN values during pg_replication_slot_advance() (Michael Paquier) §
This function previously failed to do that, possibly preventing resource cleanup (such as removal of no-longer-needed WAL segments) after manual advancement of a replication slot.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix slow execution of ts_headline() (Tom Lane) §
The phrase-search fix added in our previous set of minor releases could cause ts_headline() to take unreasonable amounts of time for long documents; to make matters worse, the query was not cancellable within the troublesome loop.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ensure the repeat() function can be interrupted by query cancel (Joe Conway) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix pg_current_logfile() to not include a carriage return (\r) in its result on Windows (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ensure that pg_read_file() and related functions read until EOF is reached (Joe Conway) § §
Previously, if not given a specific data length to read, these functions would stop at whatever file length was reported by stat(). That's unhelpful for pipes and other sorts of virtual files.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Forbid numeric NaN values in jsonpath computations (Alexander Korotkov) §
Neither SQL nor JSON have the concept of NaN (not-a-number), but the jsonpath code attempted to allow such values anyway. This necessarily leads to nonstandard behavior, so it seems better to reject such values at the outset.
Changes
Handle single Inf or NaN inputs correctly in floating-point aggregates (Tom Lane) §
The affected aggregates are corr(), covar_pop(), regr_intercept(), regr_r2(), regr_slope(), regr_sxx(), regr_sxy(), regr_syy(), stddev_pop(), and var_pop(). The correct answer in such cases is NaN, but an algorithmic change introduced in PostgreSQL v12 had caused these aggregates to produce zero instead.
Changes
Fix mis-handling of NaN inputs during parallel aggregation on numeric-type columns (Tom Lane) §
If some partial aggregation workers found only NaNs while others found only non-NaNs, the results were combined incorrectly, possibly leading to the wrong overall result (i.e., not NaN when it should be).
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Reject time-of-day values greater than 24 hours (Tom Lane) §
The intention of the datetime input code is to allow “24:00:00” or equivalently “23:59:60”, but no larger value. However, the range check was miscoded so that it would accept “23:59:60.nnn” with nonzero fractional-second nnn. In timestamp values this would result in wrapping into the first second of the next day. In time and timetz values, the stored value would actually be more than 24 hours, causing dump/reload failures and possibly other misbehavior.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Undo double-quoting of index names in EXPLAIN's non-text output formats (Tom Lane, Euler Taveira) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix EXPLAIN's accounting for resource usage, particularly buffer accesses, in parallel workers in a plan using Gather Merge nodes (Jehan-Guillaume de Rorthais) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix timing of constraint revalidation in ALTER TABLE (David Rowley) §
If ALTER TABLE needs to fully rewrite the table's contents (for example, due to change of a column's data type) and also needs to scan the table to re-validate foreign keys or CHECK constraints, it sometimes did things in the wrong order, leading to odd errors such as “could not read block 0 in file "base/nnnnn/nnnnn": read only 0 of 8192 bytes”.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix REINDEX CONCURRENTLY to preserve the index's replication identity flag (Michael Paquier) §
Previously, reindexing a table's replica identity index caused the setting to be lost, preventing old tuple values from being included in future logical-decoding output.
Changes
Work around incorrect not-null markings for pg_subscription.subslotname and pg_subscription_rel.srsublsn (Tom Lane) § §
The bootstrap catalog data incorrectly marks these two catalog columns as always non-null. There's no easy way to correct that mistake in existing installations (though v13 and later will have the correct markings). The main place that depends on that marking being correct is JIT-enabled tuple deconstruction, so teach it to explicitly ignore the marking for these two columns. Also adjust some C code that accessed srsublsn without checking to see if it's null; a crash from that is improbable but perhaps not impossible.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Cope with LATERAL references in restriction clauses attached to an un-flattened sub-SELECT in the FROM clause (Tom Lane) §
This oversight could result in assertion failures or crashes at query execution.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Use the query-specified collation for operators invoked during selectivity estimation (Tom Lane) § §
Previously, the collation of the underlying database column was used. But using the query's collation is arguably more correct. More importantly, now that we have nondeterministic collations, there are cases where an operator will fail outright if given a nondeterministic collation. We don't want planning to fail in cases where the query itself would work, so this means that we must use the query's collation when invoking operators for estimation purposes.
Changes
Avoid believing that a never-analyzed foreign table has zero tuples (Tom Lane) §
This primarily affected the planner's estimate of the number of groups that would be obtained by GROUP BY.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Remove bogus warning about “leftover placeholder tuple” in BRIN index de-summarization (Álvaro Herrera) §
The case can occur legitimately after a cancelled vacuum, so warning about it is overly noisy.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix selection of tablespaces for “shared fileset” temporary files (Magnus Hagander, Tom Lane) § §
If temp_tablespaces is empty or explicitly names the database's primary tablespace, such files got placed into the pg_default tablespace rather than the database's primary tablespace as expected.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix corner-case error in masking of SP-GiST index pages during WAL consistency checking (Alexander Korotkov) §
This could cause false failure reports when wal_consistency_checking is enabled.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Improve error handling in the server's buffile module (Thomas Munro) § §
Fix some cases where I/O errors were indistinguishable from reaching EOF, or were not reported at all. Also add details such as block numbers and byte counts where appropriate.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix conflict-checking anomalies in SERIALIZABLE isolation mode (Peter Geoghegan) §
If a concurrently-inserted tuple was updated by a different concurrent transaction, and neither tuple version was visible to the current transaction's snapshot, serialization conflict checking could draw the wrong conclusions about whether the tuple was relevant to the results of the current transaction. This could allow a serializable transaction to commit when it should have failed with a serialization error.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid repeated marking of dead btree index entries as dead (Masahiko Sawada) §
While functionally harmless, this led to useless WAL traffic when checksums are enabled or wal_log_hints is on.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix checkpointer process to discard file sync requests when fsync is off (Heikki Linnakangas) §
Such requests are treated as no-ops if fsync is off, but we forgot to remove them from the checkpointer's table of pending actions. This would lead to bloat of that table, as well as possible assertion failures if fsync is later re-enabled.
Changes
Avoid trouble during cleanup of a non-exclusive backup when JIT compilation has been activated during the backup (Robert Haas) § §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix failure of some code paths to acquire the correct lock before modifying pg_control (Nathan Bossart, Fujii Masao) §
This oversight could allow pg_control to be written out with an inconsistent checksum, possibly causing trouble later, including inability to restart the database if it crashed before the next pg_control update.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix errors in currtid() and currtid2() (Michael Paquier) § §
These functions (which are undocumented and used only by ancient versions of the ODBC driver) contained coding errors that could result in crashes, or in confusing error messages such as “could not open file” when applied to a relation having no storage.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid calling elog() or palloc() while holding a spinlock (Michael Paquier, Tom Lane) § §
Logic associated with replication slots had several violations of this coding rule. While the odds of trouble are quite low, an error in the called function would lead to a stuck spinlock.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix assertion in logical replication subscriber to allow use of REPLICA IDENTITY FULL (Euler Taveira) §
This was just an incorrect assertion, so it has no impact on standard production builds.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ensure that libpq continues to try to read from the database connection socket after a write failure (Tom Lane) §
This is important not only to ensure that we collect any final error message from a dying server process, but because we do not consider the connection lost until we see a read failure. This oversight allowed libpq to continue trying to send COPY data indefinitely after a mid-transfer loss of connection, rather than reporting failure to the application.
Changes
Fix bugs in libpq's management of GSS encryption state (Tom Lane) §
A connection using GSS encryption could freeze up when attempting to reset it after a server restart, or when moving on to the next one of a list of candidate servers.
Changes
Fix ecpg crash with bytea and cursor variables (Jehan-Guillaume de Rorthais) §
Changes
Report out-of-disk-space errors properly in pg_dump and pg_basebackup (Justin Pryzby, Tom Lane, Álvaro Herrera) §
Some code paths could produce silly reports like “could not write file: Success”.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Make pg_restore cope with data-offset-less custom-format archive files when it needs to restore data items out of order (David Gilman, Tom Lane) § §
pg_dump will produce such files if it cannot seek its output (for example, if the output is piped to something). This fix primarily improves the ability to do a parallel restore from such a file.
Changes
Fix parallel restore of tables having both table-level privileges and per-column privileges (Tom Lane) §
The table-level privilege grants have to be applied first, but a parallel restore did not reliably order them that way; this could lead to “tuple concurrently updated” errors, or to disappearance of some per-column privilege grants. The fix for this is to include dependency links between such entries in the archive file, meaning that a new dump has to be taken with a corrected pg_dump to ensure that the problem will not recur.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ensure that pg_upgrade runs with vacuum_defer_cleanup_age set to zero in the target cluster (Bruce Momjian) §
If the target cluster's configuration has been modified to set vacuum_defer_cleanup_age to a nonzero value, that prevented freezing of the system catalogs from working properly, which caused the upgrade to fail in confusing ways. Ensure that any such setting is overridden for the duration of the upgrade.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix pg_recvlogical to drain pending messages before exiting (Noah Misch) § §
Without this, the replication sender might detect a send failure and exit without making the expected final update to the replication slot's LSN position. That led to re-transmitting data after the next connection. It was also possible to miss error messages sent after the last data that pg_recvlogical wants to consume.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix pg_rewind's handling of just-deleted files in the source data directory (Justin Pryzby, Michael Paquier) §
When working with an on-line source database, concurrent file deletions are possible, but pg_rewind would get confused if deletion happened between seeing a file's directory entry and examining it with stat().
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Make pg_test_fsync use binary I/O mode on Windows (Michael Paquier) §
Previously it wrote the test file in text mode, which is not an accurate reflection of PostgreSQL's actual usage.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix contrib/amcheck to not complain about deleted index pages that are empty (Alexander Korotkov) §
This state of affairs is normal during WAL replay.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix failure to initialize local state correctly in contrib/dblink (Joe Conway) §
With the right combination of circumstances, this could lead to dblink_close() issuing an unexpected remote COMMIT.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix contrib/pgcrypto's misuse of deflate() (Tom Lane) §
The pgp_sym_encrypt functions could produce incorrect compressed data due to mishandling of zlib's API requirements. We have no reports of this error manifesting with stock zlib, but it can be seen when using IBM's zlibNX implementation.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix corner case in decompression logic in contrib/pgcrypto's pgp_sym_decrypt functions (Kyotaro Horiguchi, Michael Paquier) §
A compressed stream can validly end with an empty packet, but the decompressor failed to handle this and would complain about corrupt data.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Support building our NLS code with Microsoft Visual Studio 2015 or later (Juan José Santamaría Flecha, Davinder Singh, Amit Kapila) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid possible failure of our MSVC install script when there is a file named configure several levels above the source code tree (Arnold Müller) §
This could confuse some logic that looked for configure to identify the top level of the source tree.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
A dump/restore is not required for those running 12.X.
However, if you are upgrading from a version earlier than 12.2, see Section E.21.
Changes
Fix possible failure with GENERATED columns (David Rowley) §
If a GENERATED column's value is an exact copy of another column of the table (and it is a pass-by-reference data type), it was possible to crash or insert corrupted data into the table. While it would be rather pointless for a GENERATED expression to just duplicate another column, an expression using a function that sometimes returns its input unchanged could create the situation.
Changes
Handle inheritance of generated columns better (Peter Eisentraut) §
When a table column is inherited during CREATE TABLE ... INHERITS, disallow changing any generation properties when the parent column is already marked GENERATED; but allow a child column to be marked GENERATED when its parent is not.
Changes
Fix cross-column references in CREATE TABLE LIKE INCLUDING GENERATED (Peter Eisentraut) §
CREATE TABLE ... LIKE failed when trying to copy a GENERATED expression that references a physically-later column.
Changes
Propagate ALTER TABLE ... SET STORAGE to indexes (Peter Eisentraut) §
Non-expression index columns have always copied the attstorage property of their table column at creation. Update them when ALTER TABLE ... SET STORAGE is done, to maintain consistency.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Preserve the indisclustered setting of indexes rewritten by ALTER TABLE (Amit Langote, Justin Pryzby) §
Previously, ALTER TABLE lost track of which index had been used for CLUSTER.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Preserve the replica identity properties of indexes rewritten by ALTER TABLE (Quan Zongliang, Peter Eisentraut) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Preserve the indisclustered setting of indexes rebuilt by REINDEX CONCURRENTLY (Justin Pryzby) §
Changes
Lock objects sooner during DROP OWNED BY (Álvaro Herrera) §
This avoids failures in race-condition cases where another session is deleting some of the same objects.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix error-case processing for CREATE ROLE ... IN ROLE (Andrew Gierth) §
Some error cases would be reported as “unexpected node type” or the like, instead of the intended message.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ensure that when a partition is detached, any triggers cloned from its formerly-parent table are removed (Justin Pryzby) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix crash when COLLATE is applied to a non-collatable type in a partition bound expression (Dmitry Dolgov) §
Changes
Ensure that unique indexes over partitioned tables match the equality semantics of the partitioning key (Guancheng Luo) §
This would only be an issue with index opclasses that have unusual notions of equality, but it's wrong in theory, so check.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ensure that members of the pg_read_all_stats role can read all statistics views, as expected (Magnus Hagander) §
The functions underlying the pg_stat_progress_* views had not gotten this memo.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Repair performance regression in information_schema.triggers view (Tom Lane) §
This patch redefines that view so that an outer WHERE clause constraining the table name can be pushed down into the view, allowing its calculations to be done only for triggers belonging to the table of interest rather than all triggers in the database. In a database with many triggers this would make a significant speed difference for queries of that form. Since things worked that way before v11, this is a potential performance regression. Users who find this to be a problem can fix it by replacing the view definition (or, perhaps, just deleting and reinstalling the whole information_schema schema).
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Repair performance regression in floating point overflow/underflow detection (Emre Hasegeli) §
Previous refactoring had resulted in isinf() being called extra times in some hot code paths.
Changes
Fix full text search to handle NOT above a phrase search correctly (Tom Lane) §
Queries such as !(foo<->bar) failed to find matching rows when implemented as a GiST or GIN index search.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix full text search for cases where a phrase search includes an item with both prefix matching and a weight restriction (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix ts_headline() to make better headline selections when working with phrase queries (Tom Lane) § § §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix bugs in gin_fuzzy_search_limit processing (Adé Heyward, Tom Lane) §
A small value of gin_fuzzy_search_limit could result in unexpected slowness due to unintentionally rescanning the same index page many times. Another code path failed to apply the intended filtering at all, possibly returning too many values.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Allow input of type circle to accept the format “(” as the documentation says it does (David Zhang) §x,y),r
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Make the get_bit() and set_bit() functions cope with bytea strings longer than 256MB (Movead Li) §
Since the bit number argument is only int4, it's impossible to use these functions to access bits beyond the first 256MB of a long bytea. We'll widen the argument to int8 in v13, but in the meantime, allow these functions to work on the initial substring of a long bytea.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ignore file-not-found errors in pg_ls_waldir() and allied functions (Tom Lane) §
This prevents a race condition failure if a file is removed between when we see its directory entry and when we attempt to stat() it.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid possibly leaking an open-file descriptor for a directory in pg_ls_dir(), pg_timezone_names(), pg_tablespace_databases(), and allied functions (Justin Pryzby) § § §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix polymorphic-function type resolution to correctly infer the actual type of an anyarray output when given only an anyrange input (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix server's connection-startup logic for case where a GSSAPI connection is rejected because support is not compiled in, and the client then tries SSL instead (Andrew Gierth) §
This led to a bogus “unsupported frontend protocol” failure.
Changes
Fix memory leakage during GSSAPI encryption (Tom Lane) §
Both the backend and libpq would leak memory equivalent to the total amount of data sent during the session, if GSSAPI encryption is in use.
Changes
Fix query-lifespan memory leak for a set-returning function used in a query's FROM clause (Andres Freund) §
Changes
Avoid leakage of a hashed subplan's hash tables across multiple executions (Andreas Karlsson, Tom Lane) §
This mistake could result in severe memory bloat if a query re-executed a hashed subplan enough times.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Improve planner's handling of no-op domain coercions (Tom Lane) §
Fix some cases where a domain coercion that does nothing was not completely removed from expressions.
Changes
Avoid unlikely crash when REINDEX is terminated by a session-shutdown signal (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Prevent printout of possibly-incorrect hash join table statistics in EXPLAIN (Konstantin Knizhnik, Tom Lane, Thomas Munro) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix reporting of elapsed time for heap truncation steps in VACUUM VERBOSE (Tatsuhito Kasahara) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix possible undercounting of deleted B-tree index pages in VACUUM VERBOSE output (Peter Geoghegan) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix wrong bookkeeping for oldest deleted page in a B-tree index (Peter Geoghegan) § §
This could cause subtly wrong decisions about when VACUUM can skip an index cleanup scan; although it appears there may be no significant user-visible effects from that.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ensure that TimelineHistoryRead and TimelineHistoryWrite wait states are reported in all code paths that read or write timeline history files (Masahiro Ikeda) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid possibly showing “waiting” twice in a process's PS status (Masahiko Sawada) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid race condition when ANALYZE replaces the catalog tuple for extended statistics data (Dean Rasheed) §
Changes
Remove ill-considered skip of “redundant” anti-wraparound vacuums (Michael Paquier) §
This avoids a corner case where autovacuum could get into a loop of repeatedly trying and then skipping the same vacuum job.
Changes
Ensure INCLUDE'd columns are always removed from B-tree pivot tuples (Peter Geoghegan) §
This mistake wasted space in some rare cases, but was otherwise harmless.
Changes
Cope with invalid TOAST indexes that could be left over after a failed REINDEX CONCURRENTLY (Julien Rouhaud) §
Changes
Ensure that valid index dependencies are left behind after a failed REINDEX CONCURRENTLY (Michael Paquier) §
Previously the old index could be left with no pg_depend links at all, so that for example it would not get dropped if the parent table is dropped.
Changes
Avoid failure if autovacuum tries to access a just-dropped temporary schema (Tom Lane) §
This hazard only arises if a superuser manually drops a temporary schema; which isn't normal practice, but should work.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid premature recycling of WAL segments during crash recovery (Jehan-Guillaume de Rorthais) § §
WAL segments that become ready to be archived during crash recovery were potentially recycled without being archived.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid scanning irrelevant timelines during archive recovery (Kyotaro Horiguchi) §
This can eliminate many attempts to fetch non-existent WAL files from archive storage, which is helpful if archive access is slow.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Remove bogus “subtransaction logged without previous top-level txn record” error check in logical decoding (Arseny Sher, Amit Kapila) §
This condition is legitimately reachable in various scenarios, so remove the check.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid possible failure after a replication slot copy, due to premature removal of WAL data (Masahiko Sawada, Arseny Sher) §
Changes
Ensure that a replication slot's io_in_progress_lock is released in failure code paths (Pavan Deolasee) § §
This could result in a walsender later becoming stuck waiting for the lock.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ensure that generated columns are correctly handled during updates issued by logical replication (Peter Eisentraut) §
Changes
Fix race conditions in synchronous standby management (Tom Lane) §
During a change in the synchronous_standby_names setting, there was a window in which wrong decisions could be made about whether it is OK to release transactions that are waiting for synchronous commit. Another hazard for similarly wrong decisions existed if a walsender process exited and was immediately replaced by another.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Add missing SQLSTATE values to a few error reports (Sawada Masahiko) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix PL/pgSQL to reliably refuse to execute an event trigger function as a plain function (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix memory leak in libpq when using sslmode=verify-full (Roman Peshkurov) §
Certificate verification during connection startup could leak some memory. This would become an issue if a client process opened many database connections during its lifetime.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix ecpg to treat an argument of just “-” as meaning “read from stdin” on all platforms (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix crash in psql when attempting to re-establish a failed connection (Michael Paquier) §
Changes
Allow tab-completion of the filename argument to psql's \gx command (Vik Fearing) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Add pg_dump support for ALTER ... DEPENDS ON EXTENSION (Álvaro Herrera) § § §
pg_dump previously ignored dependencies added this way, causing them to be forgotten during dump/restore or pg_upgrade.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix pg_dump to dump comments on RLS policy objects (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
In pg_dump, postpone restore of event triggers till the end (Fabrízio de Royes Mello, Hamid Akhtar, Tom Lane) § §
This minimizes the risk that an event trigger could interfere with the restoration of other objects.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ensure that pg_basebackup generates valid tar files (Robert Haas) §
In some cases a partial block of zeroes would be added to the end of the file. While this seems to be harmless with common versions of tar, it's not OK per the POSIX file format spec.
Changes
Make pg_checksums skip tablespace subdirectories that belong to a different PostgreSQL major version (Michael Banck, Bernd Helmle) §
Such subdirectories don't really belong to our database cluster, and so must not be processed.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ignore temporary copies of pg_internal.init in pg_checksums and related programs (Michael Paquier) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix quoting of --encoding, --lc-ctype and --lc-collate values in createdb utility (Michael Paquier) § §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
contrib/lo's lo_manage() function crashed if called directly rather than as a trigger (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
In contrib/ltree, protect against overflow of ltree and lquery length fields (Nikita Glukhov) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Work around failure in contrib/pageinspect's bt_metap() function when an oldest_xact value exceeds 2^31-1 (Peter Geoghegan) §
Such XIDs will now be reported as negative integers, which isn't great but it beats throwing an error. v13 will widen the output argument to int8 to provide saner reporting.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix cache reference leak in contrib/sepgsql (Michael Luo) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
On Windows, avoid premature creation of postmaster's log file during pg_ctl start (Alexander Lakhin) §
The previous coding could allow the file to be created with permissions that wouldn't allow the postmaster to write on it.
Changes
Avoid failures when dealing with Unix-style locale names on Windows (Juan José Santamaría Flecha) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
On Windows, set console VT100 compatibility mode in programs that support PG_COLOR colorization (Juan José Santamaría Flecha) §
Without this, the colorization option doesn't actually work.
Changes
Stop requiring extra parentheses in ereport() calls (Andres Freund, Tom Lane) §
Changes
Use pkg-config, if available, to locate libxml2 during configure (Hugh McMaster, Tom Lane, Peter Eisentraut) §
If pkg-config is not present or lacks knowledge of libxml2, we still query xml2-config as before.
This change could break build processes that try to make PostgreSQL use a non-default version of libxml2 by putting that version's xml2-config into the PATH. Instead, set XML2_CONFIG to point to the non-default xml2-config. That method will work with either older or newer PostgreSQL releases.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix Makefile dependencies for libpq and ecpg (Dagfinn Ilmari Mannsåker) §
Changes
In MSVC builds, cope with spaces in the path name for Python (Victor Wagner) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
In MSVC builds, fix detection of Visual Studio version to work with more language settings (Andrew Dunstan) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
In MSVC builds, use -Wno-deprecated with bison versions newer than 3.0, as non-Windows builds already do (Andrew Dunstan) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Update time zone data files to tzdata release 2020a for DST law changes in Morocco and the Canadian Yukon, plus historical corrections for Shanghai. (Tom Lane) § § §
The America/Godthab zone has been renamed to America/Nuuk to reflect current English usage; however, the old name remains available as a compatibility link.
Also, update initdb's list of known Windows time zone names to include recent additions, improving the odds that it will correctly translate the system time zone setting on that platform.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
A dump/restore is not required for those running 12.X.
However, if you have any foreign key constraints referencing partitioned tables, see the two entries below about bugs in that feature.
Changes
Add missing permissions checks for ALTER ... DEPENDS ON EXTENSION (Álvaro Herrera) §
Marking an object as dependent on an extension did not have any privilege check whatsoever. This oversight allowed any user to mark routines, triggers, materialized views, or indexes as droppable by anyone able to drop an extension. Require that the calling user own the specified object (and hence have privilege to drop it). (CVE-2020-1720)
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix TRUNCATE ... CASCADE to ensure all relevant partitions are truncated (Jehan-Guillaume de Rorthais) §
If a partition of a partitioned table is truncated with the CASCADE option, and the partitioned table has a foreign-key reference from another table, that table must also be truncated. The need to check this was missed if the referencing table was itself partitioned, possibly allowing rows to survive that violate the foreign-key constraint.
Hence, if you have foreign key constraints between partitioned tables, and you have done any partition-level TRUNCATE on the referenced table, you should check to see if any foreign key violations exist. The simplest way is to add a new instance of the foreign key constraint (and, once that succeeds, drop it or the original constraint). That may be prohibitive from a locking standpoint, however, in which case you might prefer to manually query for unmatched rows.
Changes
Fix failure to attach foreign key constraints to sub-partitions (Jehan-Guillaume de Rorthais) §
When adding a partition to a level below the first level of a multi-level partitioned table, foreign key constraints referencing the top partitioned table were not cloned to the new partition, leading to possible constraint violations later. Detaching and re-attaching the new partition is the cheapest way to fix this. However, if there are many partitions to be fixed, adding a new instance of the foreign key constraint might be preferable.
Changes
Fix possible crash during concurrent update on a partitioned table or inheritance tree (Tom Lane) §
Changes
Ensure that row triggers on partitioned tables are correctly cloned to sub-partitions when appropriate (Álvaro Herrera) §
User-defined triggers (but not triggers for foreign key or deferred unique constraints) might be missed when creating or attaching a partition.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix logical replication subscriber code to execute per-column UPDATE triggers when appropriate (Peter Eisentraut) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid failure in logical decoding when a large transaction must be spilled into many separate temporary files (Amit Khandekar) § §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix possible crash or data corruption when a logical replication subscriber processes a row update (Tom Lane, Tomas Vondra) §
This bug caused visible problems only if the subscriber's table contained columns that were not being copied from the publisher and had pass-by-reference data types.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix crash in logical replication subscriber after DDL changes on a subscribed relation (Jehan-Guillaume de Rorthais, Vignesh C) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix failure in logical replication publisher after a database crash and restart (Vignesh C) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ensure that the effect of pg_replication_slot_advance() on a physical replication slot will persist across restarts (Alexey Kondratov, Michael Paquier) § §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Improve efficiency of logical replication with REPLICA IDENTITY FULL (Konstantin Knizhnik) §
When searching for an existing tuple during an update or delete operation, return the first matching tuple not the last one.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix base backup to handle database OIDs larger than INT32_MAX (Peter Eisentraut) §
Changes
Ensure parallel plans are always shut down at the correct time (Kyotaro Horiguchi) §
This oversight is known to result in “temporary file leak” warnings from multi-batch parallel hash joins.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Prevent premature shutdown of a Gather or GatherMerge plan node that is underneath a Limit node (Amit Kapila) §
This avoids failure if such a plan node needs to be scanned more than once, as for instance if it is on the inside of a nestloop.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Improve efficiency of parallel hash join on CPUs with many cores (Gang Deng, Thomas Munro) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid crash in parallel CREATE INDEX when there are no free dynamic shared memory slots (Thomas Munro) § §
Fall back to a non-parallel index build, instead.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid memory leak when there are no free dynamic shared memory slots (Thomas Munro) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ignore the CONCURRENTLY option when performing an index creation, drop, or rebuild on a temporary table (Michael Paquier, Heikki Linnakangas, Andres Freund) §
This avoids strange failures if the temporary table has an ON COMMIT action. There is no benefit in using CONCURRENTLY for a temporary table anyway, since other sessions cannot access the table, making the extra processing pointless.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix possible failure when resetting expression indexes on temporary tables that are marked ON COMMIT DELETE ROWS (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix possible crash in BRIN index operations with box, range and inet data types (Heikki Linnakangas) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix handling of deleted pages in GIN indexes (Alexander Korotkov) § § § §
Avoid possible deadlocks, incorrect updates of a deleted page's state, and failure to traverse through a recently-deleted page.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix possible crash with a SubPlan (sub-SELECT) within a multi-row VALUES list (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix failure in ALTER TABLE when a column referenced in a GENERATED expression has been added or changed in type earlier in the same ALTER command (Tom Lane) §
Changes
Fix failure to insert default values for “missing” attributes during tuple conversion (Vik Fearing, Andrew Gierth) §
This could result in values incorrectly reading as NULL, when they come from columns that had been added by ALTER TABLE ADD COLUMN with a constant default.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix crash after FileClose() failure (Noah Misch) §
This issue could only be observed with data_sync_retry enabled, since otherwise FileClose() failure would be reported as a PANIC.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix handling of multiple AFTER ROW triggers on a foreign table (Etsuro Fujita) §
Changes
Fix unlikely crash with pass-by-reference aggregate transition states (Andres Freund, Teodor Sigaev) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Improve error reporting in to_date() and to_timestamp() (Tom Lane, Álvaro Herrera) § §
Reports about incorrect month or day names in input strings could truncate the input in the middle of a multi-byte character, leading to an improperly encoded error message that could cause follow-on failures. Truncate at the next whitespace instead.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix off-by-one result for EXTRACT(ISOYEAR FROM for BC dates (Tom Lane) §timestamp)
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ensure that the <> operator for type char reports indeterminate-collation errors as such, rather than as “cache lookup failed for collation 0” (Tom Lane) §
Changes
Avoid treating TID scans as sequential scans (Tatsuhito Kasahara) § §
A refactoring oversight caused TID scans (selection by CTID) to be counted as sequential scans in the statistics views, and to take whole-table predicate locks as sequential scans do. The latter behavior could cause unnecessary serialization errors in serializable transaction mode.
Changes
Avoid stack overflow in information_schema views when a self-referential view exists in the system catalogs (Tom Lane) §
A self-referential view can't work; it will always result in infinite recursion. We handled that situation correctly when trying to execute the view, but not when inquiring whether it is automatically updatable.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ensure that walsender processes always show NULL for transaction start time in pg_stat_activity (Álvaro Herrera) § §
Previously, the xact_start column would sometimes show the process start time.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Improve performance of hash joins with very large inner relations (Thomas Munro) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Reduce spinlock contention when there are many active walsender processes (Pierre Ducroquet) §
Changes
Fix placement of “Subplans Removed” field in EXPLAIN output (Daniel Gustafsson, Tom Lane) §
In non-text output formats, this field was emitted inside the “Plans” sub-group, resulting in syntactically invalid output. Attach it to the parent Append or MergeAppend plan node as intended. This causes the field to change position in text output format too: if there are any InitPlans attached to the same plan node, “Subplans Removed” will now appear before those.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix EXPLAIN's SETTINGS option to print as empty in non-text output formats (Tom Lane) §
In the non-text output formats, fields are supposed to appear when requested, even if they have empty or zero values.
Changes
Allow the planner to apply potentially-leaky tests to child-table statistics, if the user can read the corresponding column of the table that's actually named in the query (Dilip Kumar, Amit Langote) §
This change fixes a performance problem for partitioned tables that was created by the fix for CVE-2017-7484. That security fix disallowed applying leaky operators to statistics for columns that the current user doesn't have permission to read directly. However, it's somewhat common to grant permissions only on the parent partitioned table and not bother to do so on individual partitions. In such cases, the user can read the column via the parent, so there's no point in this security restriction; it only results in poorer planner estimates than necessary.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix planner errors induced by overly-aggressive collapsing of joins to single-row subqueries (Tom Lane) §
This mistake led to errors such as “failed to construct the join relation”.
Changes
Fix “no = operator for opfamily NNNN” planner error when trying to match a LIKE or regex pattern-match operator to a binary-compatible index opclass (Tom Lane) §
Changes
Fix edge-case crashes and misestimations in selectivity calculations for the <@ and @> range operators (Michael Paquier, Andrey Borodin, Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ignore system columns when applying most-common-value extended statistics (Tomas Vondra) §
This prevents “negative bitmapset member not allowed” planner errors for affected queries.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix BRIN index logic to support hypothetical BRIN indexes (Julien Rouhaud, Heikki Linnakangas) §
Previously, if an “index adviser” extension tried to get the planner to produce a plan involving a hypothetical BRIN index, that would fail, because the BRIN cost estimation code would always try to physically access the index's metapage. Now it checks to see if the index is only hypothetical, and uses default assumptions about the index parameters if so.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Improve error reporting for attempts to use automatic updating of views with conditional INSTEAD rules (Dean Rasheed) §
This has never been supported, but previously the error was thrown only at execution time, so that it could be masked by planner errors.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Prevent a composite type from being included in itself indirectly via a range type (Tom Lane, Julien Rouhaud) § §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Disallow partition key expressions that return pseudo-types, such as record (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix error reporting for index expressions of prohibited types (Amit Langote) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix dumping of views that contain only a VALUES list to handle cases where a view output column has been renamed (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ensure that data types and collations used in XMLTABLE constructs are accounted for when computing dependencies of a view or rule (Tom Lane) §
Previously it was possible to break a view using XMLTABLE by dropping a type, if the type was not otherwise referenced in the view. This fix does not correct the dependencies already recorded for existing views, only for newly-created ones.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Prevent unwanted downcasing and truncation of RADIUS authentication parameters (Marcos David) §
The pg_hba.conf parser mistakenly treated these fields as SQL identifiers, which in general they aren't.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Transmit incoming NOTIFY messages to the client before sending ReadyForQuery, rather than after (Tom Lane) §
This change ensures that, with libpq and other client libraries that act similarly to it, any notifications received during a transaction will be available by the time the client thinks the transaction is complete. This probably makes no difference in practical applications (which would need to cope with asynchronous notifications in any case); but it makes it easier to build test cases with reproducible behavior.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix bugs in handling of non-blocking I/O when using GSSAPI encryption (Tom Lane) §
These errors could result in dropping data (usually leading to subsequent wire-protocol-violation errors) or in a “livelock” situation where a sending process goes to sleep although not all its data has been sent. Moreover, libpq failed to keep separate encryption state for each connection, creating the possibility for failures in applications using multiple encrypted database connections.
Changes
Allow libpq to parse all GSS-related connection parameters even when the GSSAPI code hasn't been compiled in (Tom Lane) §
This makes the behavior similar to our SSL support, where it was long ago deemed to be a good idea to always accept all the related parameters, even if some are ignored or restricted due to lack of the feature in a particular build.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix incorrect handling of %b and %B format codes in ecpg's PGTYPEStimestamp_fmt_asc() function (Tomas Vondra) §
Due to an off-by-one error, these codes would print the wrong month name, or possibly crash.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid crash after an out-of-memory failure in ecpglib (Tom Lane) §
Changes
Fix parallel pg_dump/pg_restore to more gracefully handle failure to create worker processes (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Prevent possible crash or lockup when attempting to terminate a parallel pg_dump/pg_restore run via a signal (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
In pg_upgrade, look inside arrays and ranges while searching for non-upgradable data types in tables (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Apply more thorough syntax checking to createuser's --connection-limit option (Álvaro Herrera) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Cope with changes of the specific type referenced by a PL/pgSQL composite-type variable in more cases (Ashutosh Sharma, Tom Lane) §
Dropping and re-creating the composite type referenced by a PL/pgSQL variable could lead to “could not open relation with OID NNNN” errors.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid crash in postgres_fdw when trying to send a command like UPDATE remote_tab SET (x,y) = (SELECT ...) to the remote server (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
In contrib/dict_int, reject maxlen settings less than one (Tomas Vondra) §
This prevents a possible crash with silly settings for that parameter.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Disallow NULL category values in contrib/tablefunc's crosstab() function (Joe Conway) §
This case never worked usefully, and it would crash on some platforms.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix configure's probe for OpenSSL's SSL_clear_options() function so that it works with OpenSSL versions before 1.1.0 (Michael Paquier, Daniel Gustafsson) §
This problem could lead to failure to set the SSL compression option as desired, when PostgreSQL is built against an old version of OpenSSL.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Mark some timeout and statistics-tracking GUC variables as PGDLLIMPORT, to allow extensions to access them on Windows (Pascal Legrand) §
This applies to idle_in_transaction_session_timeout, lock_timeout, statement_timeout, track_activities, track_counts, and track_functions.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid memory leak in sanity checks for “slab” memory contexts (Tomas Vondra) §
This isn't an issue for production builds, since they wouldn't ordinarily have memory context checking enabled; but the leak could be quite severe in a debug build.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix multiple statistics entries reported by the LWLock statistics mechanism (Fujii Masao) §
The LWLock statistics code (which is not built by default; it requires compiling with -DLWLOCK_STATS) could report multiple entries for the same LWLock and backend process, as a result of faulty hashtable key creation.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix race condition that led to delayed delivery of interprocess signals on Windows (Amit Kapila) §
This caused visible timing oddities in NOTIFY, and perhaps other misbehavior.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix handling of a corner-case error result from Windows' ReadFile() function (Thomas Munro, Juan José Santamaría Flecha) §
So far as is known, this oversight just resulted in noisy log messages, not any actual query misbehavior.
Changes
On Windows, retry a few times after an ERROR_ACCESS_DENIED file access failure (Alexander Lakhin, Tom Lane) § §
This helps cope with cases where a file open attempt fails because the targeted file is flagged for deletion but not yet actually gone. pg_ctl, for example, frequently failed with such an error when probing to see if the postmaster had shut down yet.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
On Windows, work around sharing violations for the postmaster's log file when pg_ctl is used to start the postmaster very shortly after it's been stopped, for example by pg_ctl restart (Alexander Lakhin) §
A dump/restore is not required for those running 12.X.
Changes
Fix lock handling in REINDEX CONCURRENTLY (Michael Paquier) § §
REINDEX CONCURRENTLY neglected to take a session-level lock on the new index version, potentially allowing other sessions to manipulate it too soon. Also, a query-cancel or session-termination interrupt arriving at the wrong time could result in failure to release the session-level locks that REINDEX CONCURRENTLY does hold.
Changes
Avoid crash due to race condition when reporting the progress of a CREATE INDEX CONCURRENTLY or REINDEX CONCURRENTLY command (Álvaro Herrera) §
Changes
Avoid creating duplicate dependency entries during REINDEX CONCURRENTLY (Michael Paquier) §
This bug resulted in bloat in pg_depend, but no worse consequences than that.
Changes
Prevent VACUUM from trying to freeze an old multixact ID involving a still-running transaction (Nathan Bossart, Jeremy Schneider) §
This case would lead to VACUUM failing until the old transaction terminates.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix “wrong type of slot” error when trying to CLUSTER on an expression index (Andres Freund) §
Changes
SET CONSTRAINTS ... DEFERRED failed on partitioned tables, incorrectly complaining about lack of triggers (Álvaro Herrera) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix failure when creating indexes for a partition, if the parent partitioned table contains any dropped columns (Michael Paquier) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ensure that a partition index can be dropped after a failure to reindex it concurrently (Michael Paquier) §
The index's pg_class.relispartition flag was left in the wrong state in such a case, causing DROP INDEX to fail.
Changes
Fix handling of equivalence class members for partition-wise joins (Amit Langote) §
This oversight could lead either to failure to use a feasible partition-wise join plan, or to a “could not find pathkey item to sort” planner failure.
Changes
Ensure that offset expressions in WINDOW clauses are processed when a query's expressions are manipulated (Andrew Gierth) §
This oversight could result in assorted failures when the offsets are nontrivial expressions. One example is that a function parameter reference in such an expression would fail if the function was inlined.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid postmaster failure if a parallel query requests a background worker when no postmaster child process array slots remain free (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix crash triggered by an EvalPlanQual recheck on a table with a BEFORE UPDATE trigger (Andres Freund) §
Changes
Fix “unexpected relkind” error when a query tries to access a TOAST table (John Hsu, Michael Paquier, Tom Lane) §
The error should say that permission is denied, but this case got broken during code refactoring.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Provide a relevant error context line when an error occurs while setting GUC parameters during parallel worker startup (Thomas Munro) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ensure that fsync() is applied only to files that are opened read/write (Andres Freund, Michael Paquier) § §
Some code paths tried to do this after opening a file read-only, but on some platforms that causes “bad file descriptor” or similar errors.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Allow encoding conversion to succeed on longer strings than before (Álvaro Herrera, Tom Lane) §
Previously, there was a hard limit of 0.25GB on the input string, but now it will work as long as the converted output is not over 1GB.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid creating unnecessarily-bulky tuple stores for window functions (Andrew Gierth) §
In some cases the tuple storage would include all columns of the source table(s), not just the ones that are needed by the query.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Allow repalloc() to give back space when a large chunk is reduced in size (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ensure that temporary WAL and history files are removed at the end of archive recovery (Sawada Masahiko) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid failure in archive recovery if recovery_min_apply_delay is enabled (Fujii Masao) §
recovery_min_apply_delay is not typically used in this configuration, but it should work.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ignore restore_command, recovery_end_command, and recovery_min_apply_delay settings during crash recovery (Fujii Masao) § §
Now that these settings can be specified in postgresql.conf, they could be turned on during crash recovery, but honoring them then is undesirable. Ignore these settings until crash recovery is complete.
Changes
Fix logical replication failure when publisher and subscriber have different ideas about a table's replica identity columns (Jehan-Guillaume de Rorthais, Peter Eisentraut) § §
Declaring a column as part of the replica identity on the subscriber, when it does not exist at all on the publisher, led to “negative bitmapset member not allowed” errors.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid unwanted delay during shutdown of a logical replication walsender (Craig Ringer, Álvaro Herrera) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix timeout handling in logical replication walreceiver processes (Julien Rouhaud) §
Erroneous logic prevented wal_receiver_timeout from working in logical replication deployments.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Correctly time-stamp replication messages for logical decoding (Jeff Janes) §
This oversight resulted, for example, in pg_stat_subscription.last_msg_send_time usually reading as NULL.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix race condition during backend exit, when the backend process has previously waited for synchronous replication to occur (Dongming Liu) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid logging complaints about abandoned connections when using PAM authentication (Tom Lane) §
libpq-based clients will typically make two connection attempts when a password is required, since they don't prompt their user for a password until their first connection attempt fails. Therefore the server is coded not to generate useless log spam when a client closes the connection upon being asked for a password. However, the PAM authentication code hadn't gotten that memo, and would generate several messages about a phantom authentication failure.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix misbehavior of bitshiftright() (Tom Lane) § §
The bitstring right shift operator failed to zero out padding space that exists in the last byte of the result when the bitstring length is not a multiple of 8. While invisible to most operations, any nonzero bits there would result in unexpected comparison behavior, since bitstring comparisons don't bother to ignore the extra bits, expecting them to always be zero.
If you have inconsistent data as a result of saving the output of bitshiftright() in a table, it's possible to fix it with something like
UPDATE mytab SET bitcol = ~(~bitcol) WHERE bitcol != ~(~bitcol);
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix result of text position() function (also known as strpos()) for an empty search string (Tom Lane) §
Historically, and per the SQL standard, the result should be one in such cases, but 12.0 returned zero.
Changes
Fix detection of edge-case integer overflow in interval multiplication (Yuya Watari) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Avoid memory leak while vacuuming a GiST index (Dilip Kumar) §
Changes
On Windows, recognize additional spellings of the “Norwegian (Bokmål)” locale name (Tom Lane) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
In libpq, correctly report CONNECTION_BAD connection status after a failure caused by a syntactically invalid connect_timeout parameter value (Lars Kanis) §
Changes
Avoid compile failure if an ECPG client includes ecpglib.h while having ENABLE_NLS defined (Tom Lane) §
This risk was created by a misplaced declaration: ecpg_gettext() should not be visible to client code.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix scheduling of parallel restore of a foreign key constraint on a partitioned table (Álvaro Herrera) §
pg_dump failed to emit full dependency information for partitioned tables' foreign keys. This could allow parallel pg_restore to try to recreate a foreign key constraint too soon.
Changes
In pg_dump, ensure stable output order for similarly-named triggers and row-level-security policy objects (Benjie Gillam) §
Previously, if two triggers on different tables had the same names, they would be sorted in OID-based order, which is less desirable than sorting them by table name. Likewise for RLS policies.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Improve pg_upgrade's checks for the use of a data type that has changed representation, such as line (Tomas Vondra) § §
The previous coding could be fooled by cases where the data type of interest underlies a stored column of a domain or composite type.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
In pg_rewind with the --dry-run option, avoid updating pg_control (Alexey Kondratov) §
This could lead to failures in subsequent pg_rewind attempts.
Changes
Fix failure in pg_waldump with the -s option, when a continuation WAL record ends exactly at a page boundary (Andrey Lepikhov) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
In pg_waldump with the --bkp-details option, avoid emitting extra newlines for WAL records involving full-page writes (Andres Freund) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix small memory leak in pg_waldump (Andres Freund) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Put back pqsignal() as an exported libpq symbol (Tom Lane) §
This function was removed on the grounds that no clients should be using it, but that turns out to break usage of current libpq with very old versions of psql, and perhaps other applications.
Changes
Fix configure's test for presence of libperl so that it works on recent Red Hat releases (Tom Lane) § §
Previously, it could fail if the user sets CFLAGS to -O0.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Ensure correct code generation for spinlocks on PowerPC (Noah Misch) §
The previous spinlock coding allowed the compiler to select register zero for use with an assembly instruction that does not accept that register, causing a build failure. We have seen only one long-ago report that matches this bug, but it could cause problems for people trying to build modified PostgreSQL code or use atypical compiler options.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
On AIX, don't use the compiler option -qsrcmsg (Noah Misch) §
This avoids an internal compiler error with xlc v16.1.0, with little consequence other than changing the format of compiler error messages.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Fix MSVC build process to cope with spaces in the file path of OpenSSL (Andrew Dunstan) §
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
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