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
2017-10-05 2022-11-10
10.0 HistoricalSupport ends 2022-11-10
10.23 HistoricalSupport ends 2022-11-10
| CVE / issue | Severity | Fixed version |
|---|---|---|
| CVE-2022-1552 Confine additional operations within “security restricted operation” sandboxes Fixed in target | 8.8High | 10.21 |
| 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 | 10.15 |
| CVE-2018-16850 Ensure proper quoting of transition table names when pg_dump emits CREATE TRIGGER ... REFERENCING commands Fixed in target | 8.8High | 10.6 |
| CVE-2018-1058 Document how to configure installations and applications to guard against search-path-dependent trojan-horse attacks from other users Fixed in target | 8.8High | 10.3 |
| CVE-2018-10915 Fix failure to reset libpq's state fully between connection attempts Fixed in target | 8.5High | 10.5 |
| CVE-2019-3466 pg_ctlcluster script in postgresql-common does not drop privileges when creating socket/statistics temporary directories Fixed in target | 8.4High | 10.11 |
| CVE-2017-12172 Fix sample server-start scripts to become $PGUSER before opening $PGLOG Fixed in target | 8.4High | 10.1 |
| CVE-2021-23214 Make the server reject extraneous data after an SSL or GSS encryption handshake Fixed in target | 8.1High | 10.19 |
| CVE-2020-25694 Fix usage of complex connection-string parameters in pg_dump, pg_restore, clusterdb, reindexdb, and vacuumdb Fixed in target | 8.1High | 10.15 |
| CVE-2019-10211 Windows installer bundled OpenSSL executes code from unprotected directory Fixed in target | 7.8High | 10.10 |
| CVE-2020-25696 Prevent psql's \gset command from modifying specially-treated variables Fixed in target | 7.5High | 10.15 |
| CVE-2020-14349 Set a secure search_path in logical replication walsenders and apply workers Fixed in target | 7.5High | 10.14 |
| CVE-2019-10208 Require schema qualification to cast to a temporary type when using functional cast syntax Fixed in target | 7.5High | 10.10 |
| CVE-2019-10164 Fix buffer-overflow hazards in SCRAM verifier parsing Fixed in target | 7.5High | 10.9 |
| CVE-2022-2625 Do not let extension scripts replace objects not already belonging to the extension Fixed in target | 7.1High | 10.22 |
| CVE-2020-14350 Make contrib modules' installation scripts more secure Fixed in target | 7.1High | 10.14 |
| CVE-2018-10925 Fix INSERT ... ON CONFLICT UPDATE through a view that isn't just SELECT * FROM ... Fixed in target | 7.1High | 10.5 |
| CVE-2019-10128 EnterpriseDB Windows installer does not clear permissive ACL entries Fixed in target | 7.0High | 10.8 |
| CVE-2019-10127 BigSQL Windows installer does not clear permissive ACL entries. Fixed in target | 7.0High | 10.8 |
| CVE-2020-10733 Windows installer runs executables from uncontrolled directories Fixed in target | 6.7Medium | 10.13 |
| CVE-2019-10210 Windows installer writes superuser password to unprotected temporary file Fixed in target | 6.7Medium | 10.10 |
| CVE-2018-1053 Ensure that all temporary files made by pg_upgrade are non-world-readable Fixed in target | 6.7Medium | 10.2 |
| CVE-2021-32028 Fix mishandling of “junk” columns in INSERT ... ON CONFLICT ... UPDATE target lists Fixed in target | 6.5Medium | 10.17 |
| CVE-2021-32027 Prevent integer overflows in array subscripting calculations Fixed in target | 6.5Medium | 10.17 |
| CVE-2018-1052 Fix processing of partition keys containing multiple expressions Fixed in target | 6.5Medium | 10.2 |
| CVE-2017-15098 Fix crash due to rowtype mismatch in json{b}_populate_recordset() Fixed in target | 4.3Medium | 10.1 |
| CVE-2021-23222 Make libpq reject extraneous data after an SSL or GSS encryption handshake Fixed in target | 3.7Low | 10.19 |
| CVE-2020-1720 Add missing permissions checks for ALTER ... DEPENDS ON EXTENSION Fixed in target | 3.1Low | 10.12 |
| CVE-2019-10130 Prevent row-level security policies from being bypassed via selectivity estimators Fixed in target | 3.1Low | 10.8 |
| CVE-2018-1115 Remove public execute privilege from contrib/adminpack's pg_logfile_rotate() function Fixed in target | 3.1Low | 10.4 |
| CVE-2017-15099 Ensure that INSERT ... ON CONFLICT DO UPDATE checks table permissions and RLS policies in all cases Fixed in target | 3.1Low | 10.1 |
| 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-2025-8714 PostgreSQL pg_dump lets superuser of origin server execute arbitrary code in psql client | 8.8High | Not available for this branch |
| CVE-2024-7348 PostgreSQL relation replacement during pg_dump executes arbitrary SQL | 8.8High | Not available for this branch |
| CVE-2024-10979 PostgreSQL PL/Perl environment variable changes execute arbitrary code | 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-2024-0985 PostgreSQL non-owner REFRESH MATERIALIZED VIEW CONCURRENTLY executes arbitrary SQL | 8.0High | 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-2024-10978 PostgreSQL SET ROLE, SET SESSION AUTHORIZATION reset to wrong user ID | 4.2Medium | Not available for this branch |
| CVE-2024-10976 PostgreSQL row security below e.g. subqueries disregards user ID changes | 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 |
| CVE-2024-10977 PostgreSQL libpq retains an error message from man-in-the-middle | 3.1Low | Not available for this branch |
A dump/restore is not required for those running 10.X.
However, if you are upgrading from a version earlier than 10.19, see Section E.5.
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
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
Avoid flattening FROM-less subqueries when the outer query has grouping sets (Tom Lane)
This oversight could lead to assertion failures or planner errors such as “variable not found in subplan target list”.
“Same change” requires 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
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
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
Add some more defenses against recursion till stack overrun (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
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
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.
“Same change” requires 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 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
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
Silence assorted compiler warnings from clang 15 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
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.
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 10.X.
However, if you are upgrading from a version earlier than 10.19, see Section E.5.
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)
“Same change” requires 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 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.
“Same change” requires 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 “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.
“Same change” requires 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 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.
“Same change” requires 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, 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 “variable not found in subplan target list” planner error when pulling up a sub-SELECT that's referenced in a GROUPING function (Richard Guo)
“Same change” requires 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 pg_stat_get_subscription() from possibly returning an extra row containing garbage values (Kuntal Ghosh)
“Same change” requires 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_stop_backup() cleans up session state properly (Fujii Masao)
This omission could lead to assertion failures or crashes later in the session.
“Same change” requires 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 join alias matching in FOR [KEY] UPDATE/SHARE clauses (Dean Rasheed)
In corner cases, a misleading error could be reported.
“Same change” requires 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 crashing if too many column aliases are attached to an XMLTABLE or JSON_TABLE construct (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
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.
“Same change” requires 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 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.
“Same change” requires 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 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.
“Same change” requires 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 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.
“Same change” requires 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 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.
“Same change” requires 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 nested backup operations in logical replication walsenders (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 memory leak in logical replication subscribers (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
Ignore heap-rewrite temporary tables for materialized views in logical replication (Euler Taveira)
A FOR ALL TABLES publication will try to publish temporary tables if left to its own devices. There is a heuristic to suppress these, but it failed to cover internal temporary tables created while rewriting a materialized view. This created a risk of “logical replication target relation ... does not exist” failures during REFRESH MATERIALIZED VIEW.
Changes
Prevent open-file leak when reading an invalid timezone abbreviation file (Kyotaro Horiguchi)
Such cases could result in harmless warning 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
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
Fix WAL consistency checking logic to correctly handle BRIN_EVACUATE_PAGE flags (Haiyang Wang)
“Same change” requires 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.
“Same change” requires 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 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.
“Same change” requires 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 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.
“Same change” requires 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, 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.
“Same change” requires 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'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.
“Same change” requires 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/pg_stat_statements to avoid problems with very large query-text files on 32-bit 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
Ensure that contrib/postgres_fdw sends constants of regconfig and other reg* types with proper schema qualification (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
Block signals while allocating dynamic shared memory on Linux (Thomas Munro)
This avoids problems when a signal interrupts posix_fallocate().
“Same change” requires 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 unexpected EEXIST error from shm_open() (Thomas Munro)
This avoids a possible crash on Solaris.
“Same change” requires 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 PL/Perl test case so it will work under Perl 5.36 (Dagfinn Ilmari Mannsåker)
“Same change” requires 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 incorrectly using an out-of-date libldap_r library when multiple OpenLDAP installations are present while building PostgreSQL (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 10.X.
However, if you are upgrading from a version earlier than 10.19, see Section E.5.
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)
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
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.
“Same change” requires 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 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.
“Same change” requires 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 query-lifespan memory leak in an IndexScan node that is performing reordering (Aliaksandr Kalenik)
“Same change” requires 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 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.
“Same change” requires 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-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.
“Same change” requires 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 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.
“Same change” requires 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 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.
“Same change” requires 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 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.
“Same change” requires 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 “PANIC: xlog flush request is not satisfied” failure during standby promotion when there is a missing WAL continuation record (Sami Imseih)
“Same change” requires 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 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.
“Same change” requires 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 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.
“Same change” requires 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 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.
“Same change” requires 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 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.
“Same change” requires 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 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.
“Same change” requires 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
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
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)
“Same change” requires 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 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.
“Same change” requires 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 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.
“Same change” 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 10.X.
However, if you are upgrading from a version earlier than 10.19, see Section E.5.
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 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 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 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 10.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 10.16, see Section E.8.
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
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
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
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
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
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
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.
“Same change” requires 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 relevant wait intervals if recovery_min_apply_delay is changed during recovery (Soumyadeep Chakraborty, Ashwin Agrawal)
“Same change” requires 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 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.
“Same change” requires 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 during calculation of extended statistics (Justin Pryzby, 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
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
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.
“Same change” requires 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 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.
“Same change” requires 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 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.
“Same change” requires 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_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.
“Same change” requires 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_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.
“Same change” requires 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 filename in pg_restore's error message about an invalid large object TOC file (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 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.
“Same change” requires 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 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).
“Same change” requires 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 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.
“Same change” requires 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 OpenSSL 3.0.0 (Peter Eisentraut, Daniel Gustafsson, 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
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.
“Same change” requires 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_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.
“Same change” requires 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 GetSharedSecurityLabel() can be used in a newly-started session that has not yet built its critical relation cache entries (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
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.
“Same change” requires 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 2021e for DST law changes in Fiji, Jordan, Palestine, and Samoa, plus historical corrections for Barbados, Cook Islands, Guyana, Niue, Portugal, and Tonga.
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 10.X.
However, if you are upgrading from a version earlier than 10.16, see Section E.8.
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.
“Same change” requires 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 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.
“Same change” requires 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 cases where a query in WITH rewrites to just NOTIFY (Tom Lane)
Such cases previously crashed.
“Same change” requires 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 numeric multiplication, round the result rather than failing if it would have more than 16383 digits after the decimal point (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 corner-case errors and loss of precision when raising numeric values to very large powers (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 division-by-zero failure in to_char() with EEEE format and a numeric input value less than 10^(-1001) (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 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)
“Same change” requires 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_filenode_relation(0, 0) return NULL rather than failing (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
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.
“Same change” requires 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 SUBSCRIPTION to reject an empty slot name (Japin Li)
“Same change” requires 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 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.
“Same change” requires 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 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.
“Same change” requires 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 DROP OWNED BY when the target role is listed more than once in an RLS policy (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
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.
“Same change” requires 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 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.
“Same change” requires 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 corrupting the plan cache entry when CREATE DOMAIN or ALTER DOMAIN appears in a cached plan (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 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.
“Same change” requires 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_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.
“Same change” requires 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 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.
“Same change” requires 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 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.
“Same change” requires 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 walreceivers, avoid attempting catalog lookups after an error (Masahiko Sawada, 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
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)
“Same change” requires 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 locking to avoid reading incorrect relmapper data in the face of a concurrent write from another process (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
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.
“Same change” requires 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 cases and memory leaks in logical decoding of speculative insertions (Dilip Kumar)
“Same change” requires 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 cache reference leaks in some error cases in CREATE TABLE ... AS EXECUTE (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 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.
“Same change” requires 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 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.
“Same change” requires 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 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.
“Same change” requires 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 SP-GiST index insertion can be terminated by a query cancel request (Tom Lane, 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 uninitialized-variable bug that could cause PL/pgSQL to act as though an INTO clause specified STRICT, even though it didn't (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 abort the process for an out-of-memory failure in libpq's printing 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
In ecpg, allow the numeric value INT_MIN (usually -2147483648) to be converted to integer (John Naylor)
“Same change” requires 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 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.
“Same change” requires 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 creation date in header” warnings observed when running pg_restore on an archive file created in a different time zone (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 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.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
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.
“Same change” requires 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 problems when switching pg_receivewal between compressed and non-compressed WAL storage (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
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.
“Same change” requires 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 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)
“Same change” requires 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's regression tests to pass with Python 3.10 (Honza Horak)
“Same change” requires 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
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
Allow PostgreSQL version 10 to build with ICU 69 and newer (Peter Eisentraut)
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 10.X.
However, if you are upgrading from a version earlier than 10.16, see Section E.8.
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
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
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
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
Extend pg_identify_object_as_address() to support event triggers (Joel Jacobson)
“Same change” requires 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
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
Fix assorted minor memory leaks in the server (Tom Lane, 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
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 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 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 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 10.X.
However, see the first changelog item below, which describes cases in which reindexing indexes after the upgrade may be advisable.
Also, if you are upgrading from a version earlier than 10.11, see Section E.13.
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 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 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 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
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
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.
“Same change” requires 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 walsender processes while sending new snapshots for logical decoding (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
Fix walsender to accept additional commands after terminating replication (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
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.
“Same change” requires 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 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.
“Same change” requires 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 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 assertion failure in pg_get_functiondef() when examining a function with a TRANSFORM option (Tom Lane)
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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
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
In pg_dump, ensure that the restore script runs ALTER PUBLICATION ADD TABLE commands as the owner of the publication (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
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
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
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.
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 10.X.
However, if you are upgrading from a version earlier than 10.11, see Section E.13.
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
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
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
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 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
Fix use-after-free hazard when an event trigger monitors an ALTER TABLE operation (Jehan-Guillaume de Rorthais)
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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 relation cache memory leaks with RLS policies (Tom Lane)
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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)
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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.
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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.)
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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.
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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.
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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.
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Changes
Make pg_upgrade check for pre-existence of tablespace directories in the target cluster (Bruce Momjian)
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Changes
Fix potential memory leak in contrib/pgcrypto (Michael Paquier)
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Changes
Add check for an unlikely failure case in contrib/pgcrypto (Daniel Gustafsson)
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Changes
Fix recently-added timetz test case so it works when the USA is not observing daylight savings time (Tom Lane)
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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.
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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 10.X.
However, if you are upgrading from a version earlier than 10.11, see Section E.13.
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)
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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)
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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.
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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.
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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.
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Changes
Ensure the repeat() function can be interrupted by query cancel (Joe Conway)
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Changes
Fix pg_current_logfile() to not include a carriage return (\r) in its result on Windows (Tom Lane)
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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).
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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.
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Changes
Undo double-quoting of index names in EXPLAIN's non-text output formats (Tom Lane, Euler Taveira)
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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)
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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”.
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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.
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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.
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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.
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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.
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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.
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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.
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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
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
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 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
Use POSIX-standard strsignal() in place of the BSD-ish sys_siglist[] (Tom Lane)
This avoids build failures with very recent versions of glibc.
“Same change” requires 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 10.X.
However, if you are upgrading from a version earlier than 10.11, see Section E.13.
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
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 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
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
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
Fix low-probability crash after constraint violation errors in partitioned tables (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
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
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 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
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
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
Ensure nextXid can't go backwards on a standby server (Eka Palamadai)
This race condition could allow incorrect hot standby feedback messages to be sent back to the primary server, potentially allowing VACUUM to run too soon on the primary.
“Same change” requires 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
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
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
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
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
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
Include CFLAGS_SL in CXXFLAGS when building a shared library (Oleksii Kliukin)
This ensures that C++ source files are compiled correctly, for example by adding -fPIC when needed.
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.
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 10.X.
However, if you are upgrading from a version earlier than 10.11, see Section E.13.
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 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
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
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
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 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 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
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
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
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
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
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.
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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
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.
A dump/restore is not required for those running 10.X.
However, if you use the contrib/intarray extension with a GiST index, and you rely on indexed searches for the <@ operator, see the entry below about that.
Also, if you are upgrading from a version earlier than 10.6, see Section E.18.
Changes
Fix failure of ALTER TABLE SET with a custom relation option (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
Disallow changing a multiply-inherited column's type if not all parent tables were changed (Tom Lane)
Previously, this was allowed, whereupon queries on the now-out-of-sync parent would fail.
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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 planner's test for case-foldable characters in ILIKE with an ICU collation (Tom Lane)
This mistake caused the planner to treat too much of the pattern as being a fixed prefix, so that indexscans derived from an ILIKE clause might miss entries that they 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
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
Fix handling of whole-row variables in WITH CHECK OPTION expressions and row-level-security policy expressions (Andres Freund)
Previously, such usage might result in bogus errors about row type mismatches.
“Same change” requires 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
Prevent possible double-free if a BEFORE UPDATE trigger returns the old tuple as-is, and it is not the last such trigger (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
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
In serializable mode, ensure that row-level predicate locks are acquired on the correct version of the row (Thomas Munro, Heikki Linnakangas)
If the visible version of the row is HOT-updated, the lock might be taken on its now-dead predecessor, resulting in subtle failures to guarantee serialization.
“Same change” requires 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 an unnecessary catalog lookup during heap page pruning (Thomas Munro)
It's no longer necessary to check for unlogged indexes here, and the check caused significant performance problems in some workloads. There was also at least a theoretical possibility of deadlock.
“Same change” requires 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)
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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
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
In logical decoding, ensure that sub-transactions are correctly accounted for when reconstructing a snapshot (Masahiko Sawada)
This error leads to assertion failures; it's unclear whether any bad effects exist 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 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
Fix ALTER SYSTEM to cope with duplicate entries in postgresql.auto.conf (Ian Barwick)
ALTER SYSTEM itself will not generate such a state, but external tools that modify postgresql.auto.conf could do so. Duplicate entries for the target variable will now be removed, and then the new setting (if any) will be appended at the end.
“Same change” requires 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 include directives with empty file names in configuration files, and report include-file recursion more clearly (Ian Barwick, 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 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 some cases where an incomplete date specification is not detected in time with time zone input (Alexander Lakhin)
If a time zone with a time-varying UTC offset is specified, then a date must be as well, so that the offset can be resolved. Depending on the syntax used, this check was not enforced in some cases, allowing bogus output to be 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 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
Avoid crash when selecting a namespace node in XMLTABLE (Chapman Flack)
“Same change” requires 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 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
Fix memory leaks in lower(), upper(), and initcap() functions when using ICU collations (Konstantin Knizhnik)
“Same change” requires 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 crashes if ispell text search dictionaries contain wrong affix data (Arthur Zakirov)
“Same change” requires 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 compression logic for GIN posting lists (Heikki Linnakangas)
A GIN posting list item can require 7 bytes if the distance between adjacent indexed TIDs exceeds 16TB. One step in the logic was out of sync with that, and might try to write the value into a 6-byte buffer. In principle this could cause a stack overrun, but on most architectures it's likely that the next byte would be unused alignment padding, making the bug harmless. In any case the bug would be very difficult to hit.
“Same change” requires 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 infinity, NaN, and NULL values in KNN-GiST (Alexander Korotkov)
The query's output order could be wrong (different from a plain sort's result) if some distances computed for non-null column values are infinity or NaN.
“Same change” requires 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 searches for NULL in KNN-SP-GiST (Nikita Glukhov)
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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
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
In psql, resynchronize internal state about the server after an unexpected connection loss and successful reconnection (Peter Billen, Tom Lane)
Ordinarily this is unnecessary since the state would be the same anyway. But it can matter in corner cases, such as where the connection might lead to one of several servers. This change causes psql to re-issue any interactive messages that it would have issued at startup, for example about whether SSL 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
Avoid platform-specific null pointer dereference in psql (Quentin Rameau)
“Same change” requires 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, 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
Fix pg_dump to work again with pre-8.3 source servers (Tom Lane)
A previous fix caused pg_dump to always try to query pg_opfamily, but that catalog doesn't exist before version 8.3.
“Same change” requires 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_restore, treat -f - as meaning “output to stdout” (Álvaro Herrera)
This synchronizes pg_restore's behavior with some other applications, and in particular makes pre-v12 branches act similarly to version 12's pg_restore, simplifying creation of dump/restore scripts that work across multiple PostgreSQL versions. Before this change, pg_restore interpreted such a switch as meaning “output to a file named -”, but few people would want 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
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
Detect file read errors during pg_basebackup (Jeevan Chalke)
“Same change” requires 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_basebackup, don't fsync output files until the end of backup (Michael Paquier)
The previous coding could result in timeout failures if fsync was 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
In pg_rewind with an online source cluster, disable timeouts, much as pg_dump does (Alexander Kukushkin)
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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, include the newitemoff field in btree page split records (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
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
Fix vacuumdb with a high --jobs option to handle running out of file descriptors better (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 contrib/amcheck to skip unlogged indexes during hot standby (Andrey Borodin, Peter Geoghegan)
An unlogged index won't necessarily contain valid data in this context, so don't try to check 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 contrib/intarray's GiST opclasses to not fail for empty arrays with <@ (Tom Lane)
A clause like array_column <@ constant_array
The only practical back-patchable fix for this requires making <@ index searches scan the whole index, which is what this patch does. This is unfortunate: it means that the query performance is likely worse than a plain sequential scan would be.
Applications whose performance is adversely impacted by this change have a couple of options. They could switch to a GIN index, which doesn't have this bug, or they could replace array_column <@ constant_arrayarray_column <@ constant_array AND array_column && constant_array
“Same change” requires 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 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.
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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 PowerPC, avoid depending on the xlc compiler's __fetch_and_add() function (Noah Misch)
xlc 13 and newer interpret this function in a way incompatible with our usage, resulting in an unusable build of PostgreSQL. Fix by using custom assembly code 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
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.
Changes
Update time zone data files to tzdata release 2019c for DST law changes in Fiji and Norfolk Island, plus historical corrections for Alberta, Austria, Belgium, British Columbia, Cambodia, Hong Kong, Indiana (Perry County), Kaliningrad, Kentucky, Michigan, Norfolk Island, South Korea, and Turkey.
“Same change” 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 10.X.
However, if you are upgrading from a version earlier than 10.6, see Section E.18.
Changes
Require schema qualification to cast to a temporary type when using functional cast syntax (Noah Misch)
We have long required invocations of temporary functions to explicitly specify the temporary schema, that is pg_temp.. Require this as well for casting to temporary types using functional notation, for example func_name(args)pg_temp.. Otherwise it's possible to capture a function call using a temporary object, allowing privilege escalation in much the same ways that we blocked in CVE-2007-2138. (CVE-2019-10208)type_name(arg)
“Same change” requires 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 ALTER TABLE ... ALTER COLUMN TYPE when altering multiple columns' types in one command (Tom Lane)
This fixes a regression introduced in the most recent minor releases: indexes using the altered columns were not processed correctly, leading to strange failures during ALTER 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
Install dependencies to prevent dropping partition key columns (Tom Lane)
ALTER TABLE ... DROP COLUMN will refuse to drop a column that is a partition key column. However, indirect drops (such as a cascade from dropping a key column's data type) had no such check, allowing the deletion of a key column. This resulted in a badly broken partitioned table that could neither be accessed nor dropped.
This fix adds pg_depend entries that enforce that the whole partitioned table, not just the key column, will be dropped if a cascaded drop forces removal of the key column. However, such entries will only be created when a partitioned table is created; so this fix does not remove the risk for pre-existing partitioned tables. The issue can only arise for partition key columns of non-built-in data types, so it seems not to be a hazard for most users.
“Same change” requires 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 optimize away GROUP BY columns when the table involved is an inheritance parent (David Rowley)
Normally, if a table's primary key column(s) are included in GROUP BY, it's safe to drop any other grouping columns, since the primary key columns are enough to make the groups unique. This rule does not work if the query is also reading inheritance child tables, though; the parent's uniqueness does not extend to the children.
“Same change” requires 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 unnecessary sort steps for some queries with GROUPING SETS (Andrew Gierth, Richard Guo)
“Same change” requires 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 access trigger transition tables during EvalPlanQual rechecks (Alex Aktsipetrov)
Triggers that rely on transition tables sometimes failed in the presence of concurrent updates.
“Same change” requires 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 multi-column foreign keys when rebuilding a foreign key constraint (Tom Lane)
ALTER TABLE could make an incorrect decision about whether revalidation of a foreign key is necessary, if not all columns of the key are of the same type. It seems likely that the error would always have been in the conservative direction, that is revalidating unnecessarily.
“Same change” requires 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 build extended statistics for inheritance trees (Tomas Vondra)
This avoids a “tuple already updated by self” error during 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
Avoid spurious deadlock errors when upgrading a tuple lock (Oleksii Kliukin)
When two or more transactions are waiting for a transaction T1 to release a tuple-level lock, and T1 upgrades its lock to a higher level, a spurious deadlock among the waiting transactions could be reported when T1 finishes.
“Same change” requires 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 resolve deadlocks involving multiple parallel worker processes (Rui Hai Jiang)
It is not clear whether this bug is reachable with non-artificial queries, but if it did happen, the queries involved in an otherwise-resolvable deadlock would block until canceled.
“Same change” requires 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 incorrect canonicalization of date ranges with infinity endpoints (Laurenz Albe)
It's incorrect to try to convert an open range to a closed one or vice versa by incrementing or decrementing the endpoint value, if the endpoint is infinite; so leave the range alone in such 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 loss of fractional digits when converting very large money values to numeric (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 spinlock assembly code for MIPS CPUs so that it works on MIPS r6 (YunQiang Su)
“Same change” requires 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 ignore carriage return (\r) in connection service files (Tom Lane, Michael Paquier)
In some corner cases, service files containing Windows-style newlines could be mis-parsed, resulting in connection 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
In psql, avoid offering incorrect tab completion options after SET (Tom Lane)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.
Changes
Fix a small memory leak in psql's \d command (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 pg_dump to ensure that custom operator classes are dumped in the right order (Tom Lane)
If a user-defined opclass is the subtype opclass of a user-defined range type, related objects were dumped in the wrong order, producing an unrestorable dump. (The underlying failure to handle opclass dependencies might manifest in other cases too, but this is the only known 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
Fix possible lockup in pgbench when using -R option (Fabien Coelho)
“Same change” requires 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/passwordcheck to coexist with other users of check_password_hook (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 contrib/sepgsql tests to work under recent SELinux releases (Mike Palmiotto)
“Same change” requires 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 stability of src/test/recovery regression tests (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
Reduce stderr output from pg_upgrade's test script (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 TAP tests to work with msys Perl, in cases where the build directory is on a non-root msys mount point (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
Support building Postgres with Microsoft Visual Studio 2019 (Haribabu Kommi)
“Same change” requires 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 Visual Studio builds, honor WindowsSDKVersion environment variable, if that's set (Peifeng Qiu)
This fixes build failures in some configurations.
“Same change” requires 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 OpenSSL 1.1.0 and newer in Visual Studio builds (Juan José Santamaría Flecha, 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
Allow make options to be passed down to gmake when non-GNU make is invoked at the top level (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 choosing localtime or posixrules as TimeZone during initdb (Tom Lane)
In some cases initdb would choose one of these artificial zone names over the “real” zone name. Prefer any other match to the C library's timezone behavior over these two.
“Same change” requires 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 pg_timezone_names view to show the Factory time zone if and only if it has a short abbreviation (Tom Lane)
Historically, IANA set up this artificial zone with an “abbreviation” like Local time zone must be set--see zic manual page. Modern versions of the tzdb database show -00 instead, but some platforms alter the data to show one or another of the historical phrases. Show this zone only if it uses the modern abbreviation.
“Same change” requires 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 2019b (Tom Lane)
This adds support for zic's new -b slim option to reduce the size of the installed zone files. We are not currently using that, but may enable it in future.
“Same change” requires 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 2019b for DST law changes in Brazil, plus historical corrections for Hong Kong, Italy, and Palestine.
“Same change” 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 10.X.
However, if you are upgrading from a version earlier than 10.6, see Section E.18.
Changes
Fix buffer-overflow hazards in SCRAM verifier parsing (Jonathan Katz, Heikki Linnakangas, Michael Paquier)
Any authenticated user could cause a stack-based buffer overflow by changing their own password to a purpose-crafted value. In addition to the ability to crash the PostgreSQL server, this could suffice for executing arbitrary code as the PostgreSQL operating system account.
A similar overflow hazard existed in libpq, which could allow a rogue server to crash a client or perhaps execute arbitrary code as the client's operating system account.
The PostgreSQL Project thanks Alexander Lakhin for reporting this problem. (CVE-2019-10164)
“Same change” requires 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 ALTER TABLE ... ALTER COLUMN TYPE when the table has a partial exclusion constraint (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 of COMMENT command for comments on domain constraints (Daniel Gustafsson, 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
Prevent possible memory clobber when there are duplicate columns in a hash aggregate's hash key list (Andrew Gierth)
“Same change” requires 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 generation of merge-append plans (Tom Lane)
This mistake could lead to “could not find pathkey item to sort” 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 incorrect printing of queries with duplicate join names (Philip Dubé)
This oversight caused a dump/restore failure for views containing such 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 conversion of JSON string literals to JSON-type output columns in json_to_record() and json_populate_record() (Tom Lane)
Such cases should produce the literal as a standalone JSON value, but the code misbehaved if the literal contained any characters requiring escaping.
“Same change” requires 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 misoptimization of {1,1} quantifiers in regular expressions (Tom Lane)
Such quantifiers were treated as no-ops and optimized away; but the documentation specifies that they impose greediness, or non-greediness in the case of the non-greedy variant {1,1}?, on the subexpression they're attached to, and this did not happen. The misbehavior occurred only if the subexpression contained capturing parentheses or a back-reference.
“Same change” requires 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 failures while initializing a new process's pg_stat_activity data (Tom Lane)
Certain operations that could fail, such as converting strings extracted from an SSL certificate into the database encoding, were being performed inside a critical section. Failure there would result in database-wide lockup due to violating the access protocol for shared pg_stat_activity 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
Fix race condition in check to see whether a pre-existing shared memory segment is still in use by a conflicting postmaster (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 unsafe coding in walreceiver's signal handler (Tom Lane)
This avoids rare problems in which the walreceiver process would crash or deadlock when commanded to shut down.
“Same change” requires 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 attempting to do database accesses for parameter checking in processes that are not connected to a specific database (Vignesh C, Andres Freund)
This error could result in failures like “cannot read pg_class without having selected a 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
Avoid possible hang in libpq if using SSL and OpenSSL's pending-data buffer contains an exact multiple of 256 bytes (David Binderman)
“Same change” requires 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 initdb's handling of multiple equivalent names for the system time zone (Tom Lane, Andrew Gierth)
Make initdb examine the /etc/localtime symbolic link, if that exists, to break ties between equivalent names for the system time zone. This makes initdb more likely to select the time zone name that the user would expect when multiple identical time zones exist. It will not change the behavior if /etc/localtime is not a symlink to a zone data file, nor if the time zone is determined from the TZ environment variable.
Separately, prefer UTC over other spellings of that time zone, when neither TZ nor /etc/localtime provide a hint. This fixes an annoyance introduced by tzdata 2019a's change to make the UCT and UTC zone names equivalent: initdb was then preferring UCT, which almost nobody wants.
“Same change” requires 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 ordering of GRANT commands emitted by pg_dump and pg_dumpall for databases and tablespaces (Nathan Bossart, Michael Paquier)
If cascading grants had been issued, restore might fail due to the GRANT commands being given in an order that didn't respect their interdependencies.
“Same change” requires 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_dump recreate table partitions using CREATE TABLE then ATTACH PARTITION, rather than including PARTITION OF in the creation command (Álvaro Herrera, David Rowley)
This avoids problems with the partition's column order possibly being changed to match the parent's. Also, a partition is now restorable from the dump (as a standalone table) even if its parent table isn't restored; the ATTACH will fail, but that can just be ignored.
“Same change” requires 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 misleading error reports from reindexdb (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
Ensure that vacuumdb returns correct status if an error occurs while using parallel jobs (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
Fix contrib/auto_explain to not cause problems in parallel queries (Tom Lane)
Previously, a parallel worker might try to log its query even if the parent query were not being logged by auto_explain. This would work sometimes, but it's confusing, and in some cases it resulted in failures like “could not find key N in shm TOC”.
Also, fix an off-by-one error that resulted in not necessarily logging every query even when the sampling rate is set to 1.0.
“Same change” requires 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, account for possible data modifications by local BEFORE ROW UPDATE triggers (Shohei Mochizuki)
If a trigger modified a column that was otherwise not changed by the UPDATE, the new value was not transmitted to the remote server.
“Same change” requires 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 failure when the database encoding is set to SQL_ASCII and we attempt to log a non-ASCII string (Noah Misch)
The code had been assuming that such strings must be in UTF-8, and would throw an error if they didn't appear to be validly encoded. Now, just transmit the untranslated bytes to the log.
“Same change” requires 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 PL/pgSQL's header files C++-safe (George Tarasov)
“Same change” 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 10.X.
However, if you are upgrading from a version earlier than 10.6, see Section E.18.
Changes
Prevent row-level security policies from being bypassed via selectivity estimators (Dean Rasheed)
Some of the planner's selectivity estimators apply user-defined operators to values found in pg_statistic (e.g., most-common values). A leaky operator therefore can disclose some of the entries in a data column, even if the calling user lacks permission to read that column. In CVE-2017-7484 we added restrictions to forestall that, but we failed to consider the effects of row-level security. A user who has SQL permission to read a column, but who is forbidden to see certain rows due to RLS policy, might still learn something about those rows' contents via a leaky operator. This patch further tightens the rules, allowing leaky operators to be applied to statistics data only when there is no relevant RLS policy. (CVE-2019-10130)
“Same change” requires 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 catalog corruption when a temporary table with ON COMMIT DROP and an identity column is created in a single-statement transaction (Peter Eisentraut)
This hazard was overlooked because the case is not actually useful, since the temporary table would be dropped immediately after 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
Avoid crash when an EPQ recheck is performed for a partitioned query result relation (Amit Langote)
This occurs when using READ COMMITTED isolation level and another session has concurrently updated some of the target row(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
Fix behavior for an UPDATE or DELETE on an inheritance tree or partitioned table in which every table can be excluded (Amit Langote, Tom Lane)
In such cases, the query did not report the correct set of output columns when a RETURNING clause was present, and if there were any statement-level triggers that should be fired, it didn't fire 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
Avoid throwing incorrect errors for updates of temporary tables and unlogged tables when a FOR ALL TABLES publication exists (Peter Eisentraut)
Such tables should be ignored for publication purposes, but some parts of the code failed to do 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
Fix handling of explicit DEFAULT items in an INSERT ... VALUES command with multiple VALUES rows, if the target relation is an updatable view (Amit Langote, Dean Rasheed)
When the updatable view has no default for the column but its underlying table has one, a single-row INSERT ... VALUES will use the underlying table's default. In the multi-row case, however, NULL was always used. Correct it to act like the single-row 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
Fix CREATE VIEW to allow zero-column views (Ashutosh Sharma)
We should allow this for consistency with allowing zero-column tables. Since a table can be converted to a view, zero-column views could be created even with the restriction in place, leading to dump/reload 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
Add missing support for CREATE TABLE IF NOT EXISTS ... AS EXECUTE ... (Andreas Karlsson)
The combination of IF NOT EXISTS and EXECUTE should work, but the grammar omitted 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
Ensure that sub-SELECTs appearing in row-level-security policy expressions are executed with the correct user's permissions (Dean Rasheed)
Previously, if the table having the RLS policy was accessed via a view, such checks might be executed as the user calling the view, not as the view owner as they 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
Accept XML documents as valid values of type xml when xmloption is set to content, as required by SQL:2006 and later (Chapman Flack)
Previously PostgreSQL followed the SQL:2003 definition, which doesn't allow this. But that creates a serious problem for dump/restore: there is no setting of xmloption that will accept all valid XML data. Hence, switch to the 2006 definition.
pg_dump is also modified to emit SET xmloption = content while restoring data, ensuring that dump/restore works even if the prevailing setting is document.
“Same change” requires 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 server's startup-time checks for whether a pre-existing shared memory segment is still in use (Noah Misch)
The postmaster is now more likely to detect that there are still active processes from a previous postmaster incarnation, even if the postmaster.pid file has been removed.
“Same change” requires 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 counting parallel workers' transactions as separate transactions (Haribabu Kommi)
“Same change” requires 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 of GIN-index WAL records (Alexander Korotkov)
A fix applied in February's minor releases was not sufficiently careful about backwards compatibility, leading to problems if a standby server of that vintage reads GIN page-deletion WAL records generated by a primary server of a previous minor release.
“Same change” requires 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 while executing a SHOW command in a replication 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
Avoid memory leak when a partition's relation cache entry is rebuilt (Amit Langote, 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
Tolerate EINVAL and ENOSYS error results, where appropriate, for fsync and sync_file_range calls (Thomas Munro, James Sewell)
The previous change to panic on file synchronization failures turns out to have been excessively paranoid for certain cases where a failure is predictable and essentially means “operation not supported”.
“Same change” requires 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 correct relation name in autovacuum's pg_stat_activity display during BRIN summarize operations (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 “failed to build any N-way joins” planner failures with lateral references leading out of FULL outer joins (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 misplanning of queries in which a set-returning function is applied to a relation that is provably empty (Tom Lane, Julien Rouhaud)
In v10, this oversight only led to slightly inefficient plans, but in v11 it could cause “set-valued function called in context that cannot accept a set” 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
Check the appropriate user's permissions when enforcing rules about letting a leaky operator see pg_statistic data (Dean Rasheed)
When an underlying table is being accessed via a view, consider the privileges of the view owner while deciding whether leaky operators may be applied to the table's statistics data, rather than the privileges of the user making the query. This makes the planner's rules about what data is visible match up with the executor's, avoiding unnecessarily-poor plans.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Speed up planning when there are many equality conditions and many potentially-relevant foreign key constraints (David Rowley)
“Same change” requires 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 O(N^2) performance issue when rolling back a transaction that created many tables (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
Fix corner-case server crashes in dynamic shared memory allocation (Thomas Munro, 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 race conditions in management of dynamic shared memory (Thomas Munro)
These could lead to “dsa_area could not attach to segment” or “cannot unpin a segment that is not pinned” 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 race condition in which a hot-standby postmaster could fail to shut down after receiving a smart-shutdown request (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 when pg_identify_object_as_address() is given invalid input (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 possible “could not access status of transaction” failures in txid_status() (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
Tighten validation of encoded SCRAM-SHA-256 and MD5 passwords (Jonathan Katz)
A password string that had the right initial characters could be mistaken for one that is correctly hashed into SCRAM-SHA-256 or MD5 format. The password would be accepted but would be unusable 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
Fix handling of lc_time settings that imply an encoding different from the database's encoding (Juan José Santamaría Flecha, Tom Lane)
Localized month or day names that include non-ASCII characters previously caused unexpected errors or wrong output in such locales.
“Same change” requires 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 operator_precedence_warning checks involving unary minus operators (Rikard Falkeborn)
“Same change” requires 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 NaN as a value for floating-point server parameters (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
Rearrange REINDEX processing to avoid assertion failures when reindexing individual indexes of pg_class (Andres Freund, 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 assertion failure for parameterized dummy paths (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
Insert correct test function in the result of SnapBuildInitialSnapshot() (Antonin Houska)
No core code cares about this, but some extensions 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
Fix intermittent “could not reattach to shared memory” session startup failures on Windows (Noah Misch)
A previously unrecognized source of these failures is creation of thread stacks for a process's default thread pool. Arrange for such stacks to be allocated in a different memory region.
“Same change” requires 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 detection in directory scanning on Windows (Konstantin Knizhnik)
Errors, such as lack of permissions to read the directory, were not detected or reported correctly; instead the code silently acted as though the directory were 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
Fix grammar problems in ecpg (Tom Lane)
A missing semicolon led to mistranslation of SET (but not variable = DEFAULTSET ) in ecpg programs, producing syntactically invalid output that the server would reject. Additionally, in a variable TO DEFAULTDROP TYPE or DROP DOMAIN command that listed multiple type names, only the first type name was actually 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
Sync ecpg's syntax for CREATE TABLE AS with the server's (Daisuke Higuchi)
“Same change” requires 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 buffer overruns in ecpg's processing of include filenames (Liu Huailing, Fei Wu)
“Same change” requires 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 contrib/postgres_fdw when a query using remote grouping or aggregation has a SELECT-list item that is an uncorrelated sub-select, outer reference, or parameter symbol (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 crash in contrib/vacuumlo if an lo_unlink() call failed (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 2019a (Tom Lane)
This corrects a small bug in zic that caused it to output an incorrect year-2440 transition in the Africa/Casablanca zone, and adds support for zic's new -r option.
“Same change” requires 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 2019a for DST law changes in Palestine and Metlakatla, plus historical corrections for Israel.
Etc/UCT is now a backward-compatibility link to Etc/UTC, instead of being a separate zone that generates the abbreviation UCT, which nowadays is typically a typo. PostgreSQL will still accept UCT as an input zone abbreviation, but it won't output 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.
A dump/restore is not required for those running 10.X.
However, if you are upgrading from a version earlier than 10.6, see Section E.18.
Changes
By default, panic instead of retrying after fsync() failure, to avoid possible data corruption (Craig Ringer, Thomas Munro)
Some popular operating systems discard kernel data buffers when unable to write them out, reporting this as fsync() failure. If we reissue the fsync() request it will succeed, but in fact the data has been lost, so continuing risks database corruption. By raising a panic condition instead, we can replay from WAL, which may contain the only remaining copy of the data in such a situation. While this is surely ugly and inefficient, there are few alternatives, and fortunately the case happens very rarely.
A new server parameter data_sync_retry has been added to control this; if you are certain that your kernel does not discard dirty data buffers in such scenarios, you can set data_sync_retry to on to restore the old 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
Include each major release branch's release notes in the documentation for only that branch, rather than that branch and all later ones (Tom Lane)
The duplication induced by the previous policy was getting out of hand. Our plan is to provide a full archive of release notes on the project's web site, but not duplicate it within each release.
“Same change” requires 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 NOT NULL constraints of a partitioned table are honored within its partitions (Álvaro Herrera, 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
Use a safe table lock level when detaching a partition (Álvaro Herrera)
The previous locking level was too weak and might allow concurrent DDL on the table, with bad 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
Fix problems with applying ON COMMIT DROP and ON COMMIT DELETE ROWS to partitioned tables and tables with inheritance children (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
Disallow COPY FREEZE on partitioned tables (David Rowley)
This should eventually be made to work, but it may require a patch that's too complicated to risk back-patching.
“Same change” requires 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 deadlock when acquiring multiple buffer locks (Nishant Fnu)
“Same change” requires 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 deadlock between GIN vacuuming and concurrent index insertions (Alexander Korotkov, Andrey Borodin, Peter Geoghegan)
This change partially reverts a performance improvement, introduced in version 10.0, that attempted to reduce the number of index pages locked during deletion of a GIN posting tree page. That's now been found to lead to deadlocks, so we've removed it pending closer analysis.
“Same change” requires 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 deadlock between hot-standby queries and replay of GIN index page deletion (Alexander Korotkov)
“Same change” requires 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 crashes in logical replication when index expressions or predicates are in use (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 useless and expensive logical decoding of TOAST data during a table rewrite (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
Fix logic for stopping a subset of WAL senders when synchronous replication is enabled (Paul Guo, 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
Avoid possibly writing an incorrect replica identity field in a tuple deletion WAL record (Stas Kelvich)
“Same change” requires 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 incorrect use of WAL-skipping optimization during COPY to a view or foreign table (Amit Langote, 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
Make the archiver prioritize WAL history files over WAL data files while choosing which file to archive next (David Steele)
“Same change” requires 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 UPDATE with a multiple SET clause using a sub-SELECT as source (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 crash if libxml2 returns a null error message (Sergio Conde Gómez)
“Same change” requires 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 spurious grouping-related parser errors caused by inconsistent handling of collation assignment (Andrew Gierth)
In some cases, expressions that should be considered to match were not seen as matching, if they included operations on collatable 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
Check whether the comparison function underlying LEAST() or GREATEST() is leakproof, rather than just assuming it is (Tom Lane)
Actual information leaks from btree comparison functions are typically hard to provoke, but in principle they could happen.
“Same change” requires 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 planning of queries involving nested loops both above and below a Gather plan node (Tom Lane)
If both levels of nestloop needed to pass the same variable into their right-hand sides, an incorrect plan would be generated.
“Same change” requires 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 planning of queries in which a lateral reference must be evaluated at a foreign table scan (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 corner-case underestimation of the cost of a merge join (Tom Lane)
The planner could prefer a merge join when the outer key range is much smaller than the inner key range, even if there are so many duplicate keys on the inner side that this is a poor choice.
“Same change” requires 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 O(N^2) planning time growth when a query contains many thousand indexable clauses (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
Improve ANALYZE's handling of concurrently-updated rows (Jeff Janes, Tom Lane)
Previously, rows deleted by an in-progress transaction were omitted from ANALYZE's sample, but this has been found to lead to more inconsistency than including them would do. In effect, the sample now corresponds to an MVCC snapshot as of ANALYZE's 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
Make TRUNCATE ignore inheritance child tables that are temporary tables of other sessions (Amit Langote, Michael Paquier)
This brings TRUNCATE into line with the behavior of other commands. Previously, such cases usually ended in 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 TRUNCATE to update the statistics counters for the right table (Tom Lane)
If the truncated table had a TOAST table, that table's counters were reset 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
Process ALTER TABLE ONLY ADD COLUMN IF NOT EXISTS correctly (Greg Stark)
“Same change” requires 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 UNLISTEN in hot-standby mode (Shay Rojansky)
This is necessarily a no-op, because LISTEN isn't allowed in hot-standby mode; but allowing the dummy operation simplifies session-state-reset logic in clients.
“Same change” requires 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 missing role dependencies in some schema and data type permissions lists (Tom Lane)
In some cases it was possible to drop a role to which permissions had been granted. This caused no immediate problem, but a subsequent dump/reload or upgrade would fail, with symptoms involving attempts to grant privileges to all-numeric role names.
“Same change” requires 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 use of a session's temporary schema within a two-phase transaction (Michael Paquier)
Accessing a temporary table within such a transaction has been forbidden for a long time, but it was still possible to cause problems with other operations on temporary 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 relation caches are updated properly after adding or removing foreign key constraints (Álvaro Herrera)
This oversight could result in existing sessions failing to enforce a newly-created constraint, or continuing to enforce a dropped 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
Ensure relation caches are updated properly after renaming constraints (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
Make autovacuum more aggressive about removing leftover temporary tables, and also remove leftover temporary tables during DISCARD TEMP (Álvaro Herrera)
This helps ensure that remnants from a crashed session are cleaned up more promptly.
“Same change” requires 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 replay of GiST index micro-vacuum operations so that concurrent hot-standby queries do not see inconsistent state (Alexander Korotkov)
“Same change” requires 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 empty GIN index pages from being reclaimed too quickly, causing failures of concurrent searches (Andrey Borodin, Alexander Korotkov)
“Same change” requires 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 failures in float-to-integer coercions (Andrew Gierth, Tom Lane)
Values very slightly above the maximum valid integer value might not be rejected, and then would overflow, producing the minimum valid integer instead. Also, values that should round to the minimum or maximum integer value might be incorrectly rejected.
“Same change” requires 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 making a PAM authentication request, don't set the PAM_RHOST variable if the connection is via a Unix socket (Thomas Munro)
Previously that variable would be set to [local], which is at best unhelpful, since it's supposed to be a host name.
“Same change” requires 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 setting client_min_messages higher than ERROR (Jonah Harris, Tom Lane)
Previously, it was possible to set this variable to FATAL or PANIC, which had the effect of suppressing transmission of ordinary error messages to the client. However, that's contrary to guarantees that are given in the PostgreSQL wire protocol specification, and it caused some clients to become very confused. In released branches, fix this by silently treating such settings as meaning ERROR instead. Version 12 and later will reject those alternatives 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 ecpglib to use uselocale() or _configthreadlocale() in preference to setlocale() (Michael Meskes, Tom Lane)
Since setlocale() is not thread-local, and might not even be thread-safe, the previous coding caused problems in multi-threaded ecpg 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
Fix incorrect results for numeric data passed through an ecpg SQLDA (SQL Descriptor Area) (Daisuke Higuchi)
Values with leading zeroes were not copied 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 psql's \g target meta-command to work with COPY TO STDOUT (Daniel Vérité)
Previously, the target option was ignored, so that the copy data always went to the current query output target.
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Changes
Make psql's LaTeX output formats render special characters properly (Tom Lane)
Backslash and some other ASCII punctuation characters were not rendered correctly, leading to document syntax errors or wrong characters in the output.
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Changes
Fix pg_dump's handling of materialized views with indirect dependencies on primary keys (Tom Lane)
This led to mis-labeling of such views' dump archive entries, causing harmless warnings about “archive items not in correct section order”; less harmlessly, selective-restore options depending on those labels, such as --section, might misbehave.
“Same change” requires 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 on some platforms when pg_dump or pg_restore tries to report an 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
Properly disregard SIGPIPE errors if COPY FROM PROGRAM stops reading the program's output early (Tom Lane)
This case isn't actually reachable directly with COPY, but it can happen when using contrib/file_fdw.
“Same change” requires 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/hstore to calculate correct hash values for empty hstore values that were created in version 8.4 or before (Andrew Gierth)
The previous coding did not give the same result as for an empty hstore value created by a newer version, thus potentially causing wrong results in hash joins or hash aggregation. It is advisable to reindex any hash indexes built on hstore columns, if the table might contain data that was originally stored as far back as 8.4 and was never dumped/reloaded since then.
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Changes
Avoid crashes and excessive runtime with large inputs to contrib/intarray's gist__int_ops index support (Andrew Gierth)
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Changes
In configure, look for python3 and then python2 if python isn't found (Peter Eisentraut)
This allows PL/Python to be configured without explicitly specifying PYTHON on platforms that no longer provide an unversioned python executable.
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Changes
Support new Makefile variables PG_CFLAGS, PG_CXXFLAGS, and PG_LDFLAGS in pgxs builds (Christoph Berg)
This simplifies customization of extension build processes.
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Changes
Fix Perl-coded build scripts to not assume “.” is in the search path, since recent Perl versions don't include that (Andrew Dunstan)
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Changes
Fix server command-line option parsing problems on OpenBSD (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
Relocate call of set_rel_pathlist_hook so that extensions can use it to supply partial paths for parallel queries (KaiGai Kohei)
This is not expected to affect existing use-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
Rename red-black tree support functions to use rbt prefix not rb prefix (Tom Lane)
This avoids name collisions with Ruby functions, which broke PL/Ruby. It's hoped that there are no other affected extensions.
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Changes
Update time zone data files to tzdata release 2018i for DST law changes in Kazakhstan, Metlakatla, and Sao Tome and Principe. Kazakhstan's Qyzylorda zone is split in two, creating a new zone Asia/Qostanay, as some areas did not change UTC offset. Historical corrections for Hong Kong and numerous Pacific islands.
“Same change” 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 10.X.
However, if you use the pg_stat_statements extension, see the changelog entry below about that.
Also, if you are upgrading from a version earlier than 10.4, see Section E.20.
Changes
Ensure proper quoting of transition table names when pg_dump emits CREATE TRIGGER ... REFERENCING commands (Tom Lane)
This oversight could be exploited by an unprivileged user to gain superuser privileges during the next dump/reload or pg_upgrade run. (CVE-2018-16850)
“Same change” requires 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 failures in has_ family of functions (Tom Lane)foo_privilege()
Return NULL rather than throwing an error when an invalid object OID is provided. Some of these functions got that right already, but not all. has_column_privilege() was additionally capable of crashing 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 pg_get_partition_constraintdef() to return NULL rather than fail when passed an invalid relation OID (Tom Lane)
Changes
Avoid O(N^2) slowdown in regular expression match/split functions on long strings (Andrew Gierth)
“Same change” requires 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 standard multi-character operators that are immediately followed by a comment or + or - (Andrew Gierth)
This oversight could lead to parse errors, or to incorrect assignment of precedence.
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Changes
Avoid O(N^3) slowdown in lexer for long strings of + or - characters (Andrew Gierth)
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Changes
Fix mis-execution of SubPlans when the outer query is being scanned backwards (Andrew Gierth)
“Same change” requires 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 UPDATE/DELETE ... WHERE CURRENT OF ... after rewinding the referenced cursor (Tom Lane)
A cursor that scans multiple relations (particularly an inheritance tree) could produce wrong behavior if rewound to an earlier relation.
“Same change” requires 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 EvalPlanQual to handle conditionally-executed InitPlans properly (Andrew Gierth, Tom Lane)
This resulted in hard-to-reproduce crashes or wrong answers in concurrent updates, if they contained code such as an uncorrelated sub-SELECT inside a CASE construct.
“Same change” requires 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 creation of a partition in a trigger attached to its parent table (Amit Langote)
Ideally we'd allow that, but for the moment it has to be blocked to avoid 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 problems with applying ON COMMIT DELETE ROWS to a partitioned temporary table (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 character-class checks to not fail on Windows for Unicode characters above U+FFFF (Tom Lane, Kenji Uno)
This bug affected full-text-search operations, as well as contrib/ltree and contrib/pg_trgm.
“Same change” requires 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 pushing sub-SELECTs containing window functions, LIMIT, or OFFSET to parallel workers (Amit Kapila)
Such cases could result in inconsistent behavior due to different workers getting different answers, as a result of indeterminacy due to row-ordering variations.
“Same change” requires 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 sequences owned by a foreign table are processed by ALTER OWNER on the table (Peter Eisentraut)
The ownership change should propagate to such sequences as well, but this was missed for foreign 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
Ensure that the server will process already-received NOTIFY and SIGTERM interrupts before waiting for client input (Jeff Janes, 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 space for array_out()'s result string (Keiichi Hirobe)
“Same change” requires 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 query-lifetime memory leak in XMLTABLE (Andrew Gierth)
Changes
Fix memory leak in repeated SP-GiST index scans (Tom Lane)
This is only known to amount to anything significant in cases where an exclusion constraint using SP-GiST receives many new index entries in a single command.
“Same change” requires 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 ApplyLogicalMappingFile() closes the mapping file when done with it (Tomas Vondra)
Previously, the file descriptor was leaked, eventually resulting in failures during logical decoding.
“Same change” requires 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 handle cases where a mapped catalog table is repeatedly rewritten, e.g., by VACUUM FULL (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
Prevent starting the server with wal_level set to too low a value to support an existing replication slot (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
Avoid crash if a utility command causes infinite recursion (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 initializing a hot standby, cope with duplicate XIDs caused by two-phase transactions on the master (Michael Paquier, Konstantin Knizhnik)
“Same change” requires 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 event triggers to handle nested ALTER TABLE commands (Michael Paquier, 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
Propagate parent process's transaction and statement start timestamps to parallel workers (Konstantin Knizhnik)
This prevents misbehavior of functions such as transaction_timestamp() when executed in a worker.
“Same change” requires 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 transfer of expanded datums to parallel workers so that alignment is preserved, preventing crashes on alignment-picky platforms (Tom Lane, 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
Fix WAL file recycling logic to work correctly on standby servers (Michael Paquier)
Depending on the setting of archive_mode, a standby might fail to remove some WAL files that could be removed.
“Same change” requires 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 commit-timestamp tracking during recovery (Masahiko Sawada, Michael Paquier)
If commit timestamp tracking has been turned on or off, recovery might fail due to trying to fetch the commit timestamp for a transaction that did not record 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
Randomize the random() seed in bootstrap and standalone backends, and in initdb (Noah Misch)
The main practical effect of this change is that it avoids a scenario where initdb might mistakenly conclude that POSIX shared memory is not available, due to name collisions caused by always using the same random seed.
“Same change” requires 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 shared-memory corruption in DSA logic (Thomas Munro)
Changes
Allow DSM allocation to be interrupted (Chris Travers)
“Same change” requires 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 a parallel worker when loading an extension that tries to access system caches within its init function (Thomas Munro)
We don't consider that to be good extension coding practice, but it mostly worked before parallel query, so continue to support it for now.
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Changes
Properly handle turning full_page_writes on dynamically (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 possible crash due to double free() during SP-GiST rescan (Andrew Gierth)
“Same change” requires 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 mis-linking of src/port and src/common functions on ELF-based BSD platforms, as well as HP-UX and Solaris (Andrew Gierth, Tom Lane)
Shared libraries loaded into a backend's address space could use the backend's versions of these functions, rather than their own copies as intended. Since the behavior of the two sets of functions isn't quite the same, this led to failures.
Changes
Avoid possible buffer overrun when replaying GIN page recompression from WAL (Alexander Korotkov, Sivasubramanian Ramasubramanian)
“Same change” requires 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 overrun of a hash index's metapage when BLCKSZ is smaller than default (Dilip Kumar)
Changes
Fix missed page checksum updates in hash indexes (Amit Kapila)
Changes
Fix missed fsync of a replication slot's directory (Konstantin Knizhnik, 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 unexpected timeouts when using wal_sender_timeout on a slow server (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
Ensure that hot standby processes use the correct WAL consistency point (Alexander Kukushkin, Michael Paquier)
This prevents possible misbehavior just after a standby server has reached a consistent database state 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
Ensure background workers are stopped properly when the postmaster receives a fast-shutdown request before completing database startup (Alexander Kukushkin)
“Same change” requires 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 the free space map during WAL replay of page all-visible/frozen flag changes (Álvaro Herrera)
Previously we were not careful about this, reasoning that the FSM is not critical data anyway. However, if it's sufficiently out of date, that can result in significant performance degradation after a standby has been promoted to primary. The FSM will eventually be healed by updates, but we'd like it to be good sooner, so work harder at maintaining it 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
Avoid premature release of parallel-query resources when query end or tuple count limit is reached (Amit Kapila)
It's only okay to shut down the executor at this point if the caller cannot demand backwards scan afterwards.
“Same change” requires 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 run atexit callbacks when servicing SIGQUIT (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
Don't record foreign-server user mappings as members of extensions (Tom Lane)
If CREATE USER MAPPING is executed in an extension script, an extension dependency was created for the user mapping, which is unexpected. Roles can't be extension members, so user mappings shouldn't be either.
“Same change” requires 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 syslogger more robust against failures in opening CSV log files (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 libpq is given multiple target host names, do the DNS lookups one at a time, not all at once (Tom Lane)
This prevents unnecessary failures or slow connections when a connection is successfully made to one of the earlier servers in the list.
Changes
Fix libpq's handling of connection timeouts so that they are properly applied per host name or IP address (Tom Lane)
Previously, some code paths failed to restart the timer when switching to a new target host, possibly resulting in premature timeout.
Changes
Fix psql, as well as documentation examples, to call PQconsumeInput() before each PQnotifies() call (Tom Lane)
This fixes cases in which psql would not report receipt of a NOTIFY message until after the next command.
“Same change” requires 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 --no-publications option to also ignore publication tables (Gilles Darold)
Changes
In pg_dump, exclude identity sequences when their parent table is excluded from the dump (David Rowley)
Changes
Fix possible inconsistency in pg_dump's sorting of dissimilar object names (Jacob Champion)
“Same change” requires 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_restore will schema-qualify the table name when emitting DISABLE/ENABLE TRIGGER commands (Tom Lane)
This avoids failures due to the new policy of running restores with restrictive search path.
“Same change” requires 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_upgrade to handle event triggers in extensions correctly (Haribabu Kommi)
pg_upgrade failed to preserve an event trigger's extension-membership status.
“Same change” requires 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_upgrade's cluster state check to work correctly on a standby server (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
Enforce type cube's dimension limit in all contrib/cube functions (Andrey Borodin)
Previously, some cube-related functions could construct values that would be rejected by cube_in(), leading to dump/reload 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
In contrib/pg_stat_statements, disallow the pg_read_all_stats role from executing pg_stat_statements_reset() (Haribabu Kommi)
pg_read_all_stats is only meant to grant permission to read statistics, not to change them, so this grant was incorrect.
To cause this change to take effect, run ALTER EXTENSION pg_stat_statements UPDATE in each database where pg_stat_statements has been installed.
Changes
In contrib/postgres_fdw, don't try to ship a variable-free ORDER BY clause to the remote server (Andrew Gierth)
“Same change” requires 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/unaccent's unaccent() function to use the unaccent text search dictionary that is in the same schema as the function (Tom Lane)
Previously it tried to look up the dictionary using the search path, which could fail if the search path has a restrictive value.
“Same change” requires 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 problems on macOS 10.14 (Mojave) (Tom Lane)
Adjust configure to add an -isysroot switch to CPPFLAGS; without this, PL/Perl and PL/Tcl fail to configure or build on macOS 10.14. The specific sysroot used can be overridden at configure time or build time by setting the PG_SYSROOT variable in the arguments of configure or make.
It is now recommended that Perl-related extensions write $(perl_includespec) rather than -I$(perl_archlibexp)/CORE in their compiler flags. The latter continues to work on most platforms, but not recent macOS.
Also, it should no longer be necessary to specify --with-tclconfig manually to get PL/Tcl to build on recent macOS 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 MSVC build and regression-test scripts to work on recent Perl versions (Andrew Dunstan)
Perl no longer includes the current directory in its search path by default; work around 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
On Windows, allow the regression tests to be run by an Administrator account (Andrew Dunstan)
To do this safely, pg_regress now gives up any such privileges at startup.
“Same change” requires 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 btree comparison functions to return INT_MIN (Tom Lane)
Up to now, we've forbidden datatype-specific comparison functions from returning INT_MIN, which allows callers to invert the sort order just by negating the comparison result. However, this was never safe for comparison functions that directly return the result of memcmp(), strcmp(), etc, as POSIX doesn't place any such restriction on those functions. At least some recent versions of memcmp() can return INT_MIN, causing incorrect sort ordering. Hence, we've removed this restriction. Callers must now use the INVERT_COMPARE_RESULT() macro if they wish to invert the sort order.
“Same change” requires 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 recursion hazard in shared-invalidation message processing (Tom Lane)
This error could, for example, result in failure to access a system catalog or index that had just been processed by VACUUM FULL.
This change adds a new result code for LockAcquire, which might possibly affect external callers of that function, though only very unusual usage patterns would have an issue with it. The API of LockAcquireExtended is also 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
Save and restore SPI's global variables during SPI_connect() and SPI_finish() (Chapman Flack, Tom Lane)
This prevents possible interference when one SPI-using function calls 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
Avoid using potentially-under-aligned page buffers (Tom Lane)
Invent new union types PGAlignedBlock and PGAlignedXLogBlock, and use these in place of plain char arrays, ensuring that the compiler can't place the buffer at a misaligned start address. This fixes potential core dumps on alignment-picky platforms, and may improve performance even on platforms that allow misalignment.
“Same change” requires 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 src/port/snprintf.c follow the C99 standard's definition of snprintf()'s result value (Tom Lane)
On platforms where this code is used (mostly Windows), its pre-C99 behavior could lead to failure to detect buffer overrun, if the calling code assumed C99 semantics.
“Same change” requires 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 building on i386 with the clang compiler, require -msse2 to be used (Andres Freund)
This avoids problems with missed floating point overflow checks.
“Same change” requires 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 detection of the result type of strerror_r() (Tom Lane)
The previous coding got the wrong answer when building with icc on Linux (and perhaps in other cases), leading to libpq not returning useful error messages for system-reported 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
Update time zone data files to tzdata release 2018g for DST law changes in Chile, Fiji, Morocco, and Russia (Volgograd), plus historical corrections for China, Hawaii, Japan, Macau, and North Korea.
“Same change” 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 10.X.
However, if you are upgrading from a version earlier than 10.4, see Section E.20.
Changes
Fix failure to reset libpq's state fully between connection attempts (Tom Lane)
An unprivileged user of dblink or postgres_fdw could bypass the checks intended to prevent use of server-side credentials, such as a ~/.pgpass file owned by the operating-system user running the server. Servers allowing peer authentication on local connections are particularly vulnerable. Other attacks such as SQL injection into a postgres_fdw session are also possible. Attacking postgres_fdw in this way requires the ability to create a foreign server object with selected connection parameters, but any user with access to dblink could exploit the problem. In general, an attacker with the ability to select the connection parameters for a libpq-using application could cause mischief, though other plausible attack scenarios are harder to think of. Our thanks to Andrew Krasichkov for reporting this issue. (CVE-2018-10915)
“Same change” requires 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 INSERT ... ON CONFLICT UPDATE through a view that isn't just SELECT * FROM ... (Dean Rasheed, Amit Langote)
Erroneous expansion of an updatable view could lead to crashes or “attribute ... has the wrong type” errors, if the view's SELECT list doesn't match one-to-one with the underlying table's columns. Furthermore, this bug could be leveraged to allow updates of columns that an attacking user lacks UPDATE privilege for, if that user has INSERT and UPDATE privileges for some other column(s) of the table. Any user could also use it for disclosure of server memory. (CVE-2018-10925)
“Same change” requires 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 updates to the relfrozenxid and relminmxid values for “nailed” system catalogs are processed in a timely fashion (Andres Freund)
Overoptimistic caching rules could prevent these updates from being seen by other sessions, leading to spurious errors and/or data corruption. The problem was significantly worse for shared catalogs, such as pg_authid, because the stale cache data could persist into new sessions as well as existing 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
Fix case where a freshly-promoted standby crashes before having completed its first post-recovery checkpoint (Michael Paquier, Kyotaro Horiguchi, Pavan Deolasee, Álvaro Herrera)
This led to a situation where the server did not think it had reached a consistent database state during subsequent WAL replay, preventing restart.
“Same change” requires 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 emitting a bogus WAL record when recycling an all-zero btree page (Amit Kapila)
This mistake has been seen to cause assertion failures, and potentially it could result in unnecessary query cancellations on hot 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
During WAL replay, guard against corrupted record lengths exceeding 1GB (Michael Paquier)
Treat such a case as corrupt data. Previously, the code would try to allocate space and get a hard error, making recovery 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
When ending recovery, delay writing the timeline history file as long as possible (Heikki Linnakangas)
This avoids some situations where a failure during recovery cleanup (such as a problem with a two-phase state file) led to inconsistent timeline state 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
Improve performance of WAL replay for transactions that drop many relations (Fujii Masao)
This change reduces the number of times that shared buffers are scanned, so that it is of most benefit when that setting is large.
“Same change” requires 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 lock releasing in standby server WAL replay (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
Make logical WAL senders report streaming state correctly (Simon Riggs, Sawada Masahiko)
The code previously mis-detected whether or not it had caught up with the upstream server.
“Same change” requires 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 snapshot is provided when executing data type input functions in logical replication subscribers (Minh-Quan Tran, Álvaro Herrera)
This omission led to failures in some cases, such as domains with constraints using SQL-language functions.
Changes
Fix bugs in snapshot handling during logical decoding, allowing wrong decoding results in rare cases (Arseny Sher, 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
Add subtransaction handling in logical-replication table synchronization workers (Amit Khandekar, Robert Haas)
Previously, table synchronization could misbehave if any subtransactions were aborted after modifying a table being synchronized.
Changes
Ensure a table's cached index list is correctly rebuilt after an index creation fails partway through (Peter Geoghegan)
Previously, the failed index's OID could remain in the list, causing problems later in the same session.
“Same change” requires 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 empty uncompressed posting list pages in GIN indexes (Sivasubramanian Ramasubramanian, Alexander Korotkov)
This could result in an assertion failure after pg_upgrade of a pre-9.4 GIN index (9.4 and later will not create such pages).
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Pad arrays of unnamed POSIX semaphores to reduce cache line sharing (Thomas Munro)
This reduces contention on many-CPU systems, fixing a performance regression (compared to previous releases) on Linux and FreeBSD.
Changes
Ensure that a process doing a parallel index scan will respond to signals (Amit Kapila)
Previously, parallel workers could get stuck waiting for a lock on an index page, and not notice requests to abort the query.
Changes
Ensure that VACUUM will respond to signals within btree page deletion loops (Andres Freund)
Corrupted btree indexes could result in an infinite loop here, and that previously wasn't interruptible without forcing 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 hash-join costing mistake introduced with inner_unique optimization (David Rowley)
This could lead to bad plan choices in situations where that optimization was applicable.
Changes
Fix misoptimization of equivalence classes involving composite-type columns (Tom Lane)
This resulted in failure to recognize that an index on a composite column could provide the sort order needed for a mergejoin on that 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
Fix planner to avoid “ORDER/GROUP BY expression not found in targetlist” errors in some queries with set-returning 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
Fix handling of partition keys whose data type uses a polymorphic btree operator class, such as arrays (Amit Langote, Álvaro Herrera)
Changes
Fix SQL-standard FETCH FIRST syntax to allow parameters ($), as the standard expects (Andrew Gierth)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
Remove undocumented restriction against duplicate partition key columns (Yugo Nagata)
Changes
Disallow temporary tables from being partitions of non-temporary tables (Amit Langote, Michael Paquier)
While previously allowed, this case didn't work reliably.
Changes
Fix EXPLAIN's accounting for resource usage, particularly buffer accesses, in parallel workers (Amit Kapila, 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 SHOW ALL to show all settings to roles that are members of pg_read_all_settings, and also allow such roles to see source filename and line number in the pg_settings view (Laurenz Albe, Álvaro Herrera)
Changes
Fix failure to schema-qualify some object names in getObjectDescription and getObjectIdentity output (Kyotaro Horiguchi, Tom Lane)
Names of collations, conversions, text search objects, publication relations, and extended statistics objects were not schema-qualified when they should be.
Changes
Fix CREATE AGGREGATE type checking so that parallelism support functions can be attached to variadic aggregates (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
Widen COPY FROM's current-line-number counter from 32 to 64 bits (David Rowley)
This avoids two problems with input exceeding 4G lines: COPY FROM WITH HEADER would drop a line every 4G lines, not only the first line, and error reports could show a wrong line number.
“Same change” requires 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 replication slots to be dropped in single-user mode (Álvaro Herrera)
This use-case was accidentally broken in release 10.0.
Changes
Fix incorrect results from variance(int4) and related aggregates when run in parallel aggregation mode (David Rowley)
Changes
Process TEXT and CDATA nodes correctly in xmltable() column expressions (Markus Winand)
Changes
Cope with possible failure of OpenSSL's RAND_bytes() function (Dean Rasheed, Michael Paquier)
Under rare circumstances, this oversight could result in “could not generate random cancel key” failures that could only be resolved by restarting the postmaster.
Changes
Fix libpq's handling of some cases where hostaddr is specified (Hari Babu, Tom Lane, Robert Haas)
PQhost() gave misleading or incorrect results in some cases. Now, it uniformly returns the host name if specified, or the host address if only that is specified, or the default host name (typically /tmp or localhost) if both parameters are omitted.
Also, the wrong value might be compared to the server name when verifying an SSL certificate.
Also, the wrong value might be compared to the host name field in ~/.pgpass. Now, that field is compared to the host name if specified, or the host address if only that is specified, or localhost if both parameters are omitted.
Also, an incorrect error message was reported for an unparseable hostaddr value.
Also, when the host, hostaddr, or port parameters contain comma-separated lists, libpq is now more careful to treat empty elements of a list as selecting the default behavior.
Changes
Add a string freeing function to ecpg's pgtypes library, so that cross-module memory management problems can be avoided on Windows (Takayuki Tsunakawa)
On Windows, crashes can ensue if the free call for a given chunk of memory is not made from the same DLL that malloc'ed the memory. The pgtypes library sometimes returns strings that it expects the caller to free, making it impossible to follow this rule. Add a PGTYPESchar_free() function that just wraps free, allowing applications to follow this rule.
“Same change” requires 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's support for long long variables on Windows, as well as other platforms that declare strtoll/strtoull nonstandardly or not at all (Dang Minh Huong, 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 misidentification of SQL statement type in PL/pgSQL, when a rule change causes a change in the semantics of a statement intra-session (Tom Lane)
This error led to assertion failures, or in rare cases, failure to enforce the INTO STRICT option 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 password prompting in client programs so that echo is properly disabled on Windows when stdin is not the terminal (Matthew Stickney)
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Further fix mis-quoting of values for list-valued GUC variables in dumps (Tom Lane)
The previous fix for quoting of search_path and other list-valued variables in pg_dump output turned out to misbehave for empty-string list elements, and it risked truncation of long file paths.
“Same change” requires 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 failure to dump REPLICA IDENTITY properties for constraint indexes (Tom Lane)
Manually created unique indexes were properly marked, but not those created by declaring UNIQUE or PRIMARY KEY constraints.
“Same change” requires 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_upgrade check that the old server was shut down cleanly (Bruce Momjian)
The previous check could be fooled by an immediate-mode shutdown.
“Same change” requires 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/hstore_plperl to look through Perl scalar references, and to not crash if it doesn't find a hash reference where it expects one (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 contrib/ltree's lca() function when the input array is empty (Pierre Ducroquet)
“Same change” requires 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 various error-handling code paths in which an incorrect error code might be reported (Michael Paquier, Tom Lane, Magnus Hagander)
“Same change” requires 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 makefiles to ensure that programs link to freshly-built libraries (such as libpq.so) rather than ones that might exist in the system library directories (Tom Lane)
This avoids problems when building on platforms that supply old copies of PostgreSQL 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
Update time zone data files to tzdata release 2018e for DST law changes in North Korea, plus historical corrections for Czechoslovakia.
This update includes a redefinition of “daylight savings” in Ireland, as well as for some past years in Namibia and Czechoslovakia. In those jurisdictions, legally standard time is observed in summer, and daylight savings time in winter, so that the daylight savings offset is one hour behind standard time not one hour ahead. This does not affect either the actual UTC offset or the timezone abbreviations in use; the only known effect is that the is_dst column in the pg_timezone_names view will now be true in winter and false in summer in these 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.
A dump/restore is not required for those running 10.X.
However, if you use the adminpack extension, you should update it as per the first changelog entry below.
Also, if the function marking mistakes mentioned in the second and third changelog entries below affect you, you will want to take steps to correct your database catalogs.
Also, if you are upgrading from a version earlier than 10.3, see Section E.21.
Changes
Remove public execute privilege from contrib/adminpack's pg_logfile_rotate() function (Stephen Frost)
pg_logfile_rotate() is a deprecated wrapper for the core function pg_rotate_logfile(). When that function was changed to rely on SQL privileges for access control rather than a hard-coded superuser check, pg_logfile_rotate() should have been updated as well, but the need for this was missed. Hence, if adminpack is installed, any user could request a logfile rotation, creating a minor security issue.
After installing this update, administrators should update adminpack by performing ALTER EXTENSION adminpack UPDATE in each database in which adminpack is installed. (CVE-2018-1115)
“Same change” requires 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 volatility markings on a few built-in functions (Thomas Munro, Tom Lane)
The functions query_to_xml, cursor_to_xml, cursor_to_xmlschema, query_to_xmlschema, and query_to_xml_and_xmlschema should be marked volatile because they execute user-supplied queries that might contain volatile operations. They were not, leading to a risk of incorrect query optimization. This has been repaired for new installations by correcting the initial catalog data, but existing installations will continue to contain the incorrect markings. Practical use of these functions seems to pose little hazard, but in case of trouble, it can be fixed by manually updating these functions' pg_proc entries, for example ALTER FUNCTION pg_catalog.query_to_xml(text, boolean, boolean, text) VOLATILE. (Note that that will need to be done in each database of the installation.) Another option is to pg_upgrade the database to a version containing the corrected initial 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
Fix incorrect parallel-safety markings on a few built-in functions (Thomas Munro, Tom Lane)
The functions brin_summarize_new_values, brin_summarize_range, brin_desummarize_range, gin_clean_pending_list, cursor_to_xml, cursor_to_xmlschema, ts_rewrite, ts_stat, binary_upgrade_create_empty_extension, and pg_import_system_collations should be marked parallel-unsafe; some because they perform database modifications directly, and others because they execute user-supplied queries that might do so. They were marked parallel-restricted instead, leading to a risk of unexpected query errors. This has been repaired for new installations by correcting the initial catalog data, but existing installations will continue to contain the incorrect markings. Practical use of these functions seems to pose little hazard unless force_parallel_mode is turned on. In case of trouble, it can be fixed by manually updating these functions' pg_proc entries, for example ALTER FUNCTION pg_catalog.brin_summarize_new_values(regclass) PARALLEL UNSAFE. (Note that that will need to be done in each database of the installation.) Another option is to pg_upgrade the database to a version containing the corrected initial 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
Avoid re-using TOAST value OIDs that match dead-but-not-yet-vacuumed TOAST entries (Pavan Deolasee)
Once the OID counter has wrapped around, it's possible to assign a TOAST value whose OID matches a previously deleted entry in the same TOAST table. If that entry were not yet vacuumed away, this resulted in “unexpected chunk number 0 (expected 1) for toast value nnnnn” errors, which would persist until the dead entry was removed by VACUUM. Fix by not selecting such OIDs when creating a new TOAST entry.
“Same change” requires 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 enforce any CHECK constraints on individual partitions during COPY to a partitioned table (Etsuro Fujita)
Previously, only constraints declared for the partitioned table as a whole were checked.
Changes
Accept TRUE and FALSE as partition bound values (Amit Langote)
Previously, only string-literal values were accepted for a boolean partitioning column. But then pg_dump would print such values as TRUE or FALSE, leading to dump/reload failures.
Changes
Fix memory management for partition key comparison functions (Álvaro Herrera, Amit Langote)
This error could lead to crashes when using user-defined operator classes for partition keys.
Changes
Fix possible crash when a query inserts tuples in several partitions of a partitioned table, and those partitions don't have identical row types (Etsuro Fujita, Amit Langote)
Changes
Change ANALYZE's algorithm for updating pg_class.reltuples (David Gould)
Previously, pages not actually scanned by ANALYZE were assumed to retain their old tuple density. In a large table where ANALYZE samples only a small fraction of the pages, this meant that the overall tuple density estimate could not change very much, so that reltuples would change nearly proportionally to changes in the table's physical size (relpages) regardless of what was actually happening in the table. This has been observed to result in reltuples becoming so much larger than reality as to effectively shut off autovacuuming. To fix, assume that ANALYZE's sample is a statistically unbiased sample of the table (as it should be), and just extrapolate the density observed within those pages to the whole 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
Include extended-statistics objects in the set of table properties duplicated by CREATE TABLE ... LIKE ... INCLUDING ALL (David Rowley)
Also add an INCLUDING STATISTICS option, to allow finer-grained control over whether this happens.
Changes
Fix CREATE TABLE ... LIKE with bigint identity columns (Peter Eisentraut)
On platforms where long is 32 bits (which includes 64-bit Windows as well as most 32-bit machines), copied sequence parameters would be truncated to 32 bits.
Changes
Avoid deadlocks in concurrent CREATE INDEX CONCURRENTLY commands that are run under SERIALIZABLE or REPEATABLE READ transaction isolation (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 slow execution of REFRESH MATERIALIZED VIEW CONCURRENTLY (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 UPDATE/DELETE ... WHERE CURRENT OF to not fail when the referenced cursor uses an index-only-scan plan (Yugo Nagata, 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 incorrect planning of join clauses pushed into parameterized paths (Andrew Gierth, Tom Lane)
This error could result in misclassifying a condition as a “join filter” for an outer join when it should be a plain “filter” condition, leading to incorrect join output.
“Same change” requires 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 generation of an index-only-scan plan when the same table column appears in multiple index columns, and only some of those index columns use operator classes that can return the column value (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 misoptimization of CHECK constraints having provably-NULL subclauses of top-level AND/OR conditions (Tom Lane, Dean Rasheed)
This could, for example, allow constraint exclusion to exclude a child table that should not be excluded from 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
Prevent planner crash when a query has multiple GROUPING SETS, none of which can be implemented by sorting (Andrew Gierth)
Changes
Fix executor crash due to double free in some GROUPING SETS usages (Peter Geoghegan)
Changes
Fix misexecution of self-joins on transition tables (Thomas Munro)
Changes
Avoid crash if a table rewrite event trigger is added concurrently with a command that could call such a trigger (Álvaro Herrera, Andrew Gierth, 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 failure if a query-cancel or session-termination interrupt occurs while committing a prepared transaction (Stas Kelvich)
“Same change” requires 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 query-lifespan memory leakage in repeatedly executed hash joins (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 leak or double free of visibility map buffer pins (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 spuriously marking pages as all-visible (Dan Wood, Pavan Deolasee, Álvaro Herrera)
This could happen if some tuples were locked (but not deleted). While queries would still function correctly, vacuum would normally ignore such pages, with the long-term effect that the tuples were never frozen. In recent releases this would eventually result in errors such as “found multixact nnnnn from before relminmxid nnnnn”.
“Same change” requires 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 overly strict sanity check in heap_prepare_freeze_tuple (Álvaro Herrera)
This could result in incorrect “cannot freeze committed xmax” failures in databases that have been pg_upgrade'd from 9.2 or earlier.
“Same change” requires 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 dangling-pointer dereference when a C-coded before-update row trigger returns the “old” tuple (Rushabh Lathia)
“Same change” requires 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 locking during autovacuum worker scheduling (Jeff Janes)
The previous behavior caused drastic loss of potential worker concurrency in databases with many 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
Ensure client hostname is copied while copying pg_stat_activity data to local memory (Edmund Horner)
Previously the supposedly-local snapshot contained a pointer into shared memory, allowing the client hostname column to change unexpectedly if any existing session disconnected.
“Same change” requires 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 pg_stat_activity information for auxiliary processes correctly (Edmund Horner)
The application_name, client_hostname, and query fields might show incorrect data for such processes.
Changes
Fix incorrect processing of multiple compound affixes in ispell dictionaries (Arthur Zakirov)
“Same change” requires 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 collation-aware searches (that is, indexscans using inequality operators) in SP-GiST indexes on text columns (Tom Lane)
Such searches would return the wrong set of rows in most non-C locales.
“Same change” requires 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 query-lifespan memory leakage with SP-GiST operator classes that use traversal values (Anton Dignös)
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Count the number of index tuples correctly during initial build of an SP-GiST index (Tomas Vondra)
Previously, the tuple count was reported to be the same as that of the underlying table, which is wrong if the index is partial.
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
Count the number of index tuples correctly during vacuuming of a GiST index (Andrey Borodin)
Previously it reported the estimated number of heap tuples, which might be inaccurate, and is certainly wrong if the index is partial.
“Same change” requires 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 corner case where a streaming standby gets stuck at a WAL continuation record (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
In logical decoding, avoid possible double processing of WAL data when a walsender restarts (Craig Ringer)
“Same change” requires 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 to not assume that type OIDs match between the local and remote servers (Masahiko Sawada)
Changes
Allow scalarltsel and scalargtsel to be used on non-core datatypes (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
Reduce libpq's memory consumption when a server error is reported after a large amount of query output has been collected (Tom Lane)
Discard the previous output before, not after, processing the error message. On some platforms, notably Linux, this can make a difference in the application's subsequent memory footprint.
“Same change” requires 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 double-free crashes in ecpg (Patrick Krecker, Jeevan Ladhe)
“Same change” requires 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 handle long long int variables correctly in MSVC builds (Michael Meskes, Andrew Gierth)
“Same change” requires 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-quoting of values for list-valued GUC variables in dumps (Michael Paquier, Tom Lane)
The local_preload_libraries, session_preload_libraries, shared_preload_libraries, and temp_tablespaces variables were not correctly quoted in pg_dump output. This would cause problems if settings for these variables appeared in CREATE FUNCTION ... SET or ALTER DATABASE/ROLE ... SET clauses.
“Same change” requires 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 not fail against pre-v10 PostgreSQL servers (Michael Paquier)
A previous fix caused pg_recvlogical to issue a command regardless of server version, but it should only be issued to v10 and later 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 pg_rewind deletes files on the target server if they are deleted from the source server during the run (Takayuki Tsunakawa)
Failure to do this could result in data inconsistency on the target, particularly if the file in question is a WAL segment.
“Same change” requires 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 to handle tables in non-default tablespaces correctly (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 overflow handling in PL/pgSQL integer FOR loops (Tom Lane)
The previous coding failed to detect overflow of the loop variable on some non-gcc compilers, leading 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
Adjust PL/Python regression tests to pass under Python 3.7 (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
Support testing PL/Python and related modules when building with Python 3 and MSVC (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 errors in initial build of contrib/bloom indexes (Tomas Vondra, Tom Lane)
Fix possible omission of the table's last tuple from the index. Count the number of index tuples correctly, in case it is a partial 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
Rename internal b64_encode and b64_decode functions to avoid conflict with Solaris 11.4 built-in functions (Rainer Orth)
“Same change” requires 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 2018e (Tom Lane)
This fixes the zic timezone data compiler to cope with negative daylight-savings offsets. While the PostgreSQL project will not immediately ship such timezone data, zic might be used with timezone data obtained directly from IANA, so it seems prudent to update zic 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
Update time zone data files to tzdata release 2018d for DST law changes in Palestine and Antarctica (Casey Station), plus historical corrections for Portugal and its colonies, as well as Enderbury, Jamaica, Turks & Caicos Islands, and Uruguay.
“Same change” 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 10.X.
However, if you run an installation in which not all users are mutually trusting, or if you maintain an application or extension that is intended for use in arbitrary situations, it is strongly recommended that you read the documentation changes described in the first changelog entry below, and take suitable steps to ensure that your installation or code is secure.
Also, the changes described in the second changelog entry below may cause functions used in index expressions or materialized views to fail during auto-analyze, or when reloading from a dump. After upgrading, monitor the server logs for such problems, and fix affected functions.
Also, if you are upgrading from a version earlier than 10.2, see Section E.22.
Changes
Document how to configure installations and applications to guard against search-path-dependent trojan-horse attacks from other users (Noah Misch)
Using a search_path setting that includes any schemas writable by a hostile user enables that user to capture control of queries and then run arbitrary SQL code with the permissions of the attacked user. While it is possible to write queries that are proof against such hijacking, it is notationally tedious, and it's very easy to overlook holes. Therefore, we now recommend configurations in which no untrusted schemas appear in one's search path. Relevant documentation appears in Section 5.8.6 (for database administrators and users), Section 33.1 (for application authors), Section 37.15.6 (for extension authors), and CREATE FUNCTION (for authors of SECURITY DEFINER functions). (CVE-2018-1058)
“Same change” requires 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 use of insecure search_path settings in pg_dump and other client programs (Noah Misch, Tom Lane)
pg_dump, pg_upgrade, vacuumdb and other PostgreSQL-provided applications were themselves vulnerable to the type of hijacking described in the previous changelog entry; since these applications are commonly run by superusers, they present particularly attractive targets. To make them secure whether or not the installation as a whole has been secured, modify them to include only the pg_catalog schema in their search_path settings. Autovacuum worker processes now do the same, as well.
In cases where user-provided functions are indirectly executed by these programs — for example, user-provided functions in index expressions — the tighter search_path may result in errors, which will need to be corrected by adjusting those user-provided functions to not assume anything about what search path they are invoked under. That has always been good practice, but now it will be necessary for correct behavior. (CVE-2018-1058)
“Same change” requires 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 logical replication from trying to ship changes for unpublishable relations (Peter Eisentraut)
A publication marked FOR ALL TABLES would incorrectly ship changes in materialized views and information_schema tables, which are supposed to be omitted from the change stream.
Changes
Fix misbehavior of concurrent-update rechecks with CTE references appearing in subplans (Tom Lane)
If a CTE (WITH clause reference) is used in an InitPlan or SubPlan, and the query requires a recheck due to trying to update or lock a concurrently-updated row, incorrect results could be obtained.
“Same change” requires 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 failures with overlapping mergejoin clauses in an outer join (Tom Lane)
These mistakes led to “left and right pathkeys do not match in mergejoin” or “outer pathkeys do not match mergeclauses” planner errors in corner 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
Repair pg_upgrade's failure to preserve relfrozenxid for materialized views (Tom Lane, Andres Freund)
This oversight could lead to data corruption in materialized views after an upgrade, manifesting as “could not access status of transaction” or “found xmin from before relfrozenxid” errors. The problem would be more likely to occur in seldom-refreshed materialized views, or ones that were maintained only with REFRESH MATERIALIZED VIEW CONCURRENTLY.
If such corruption is observed, it can be repaired by refreshing the materialized view (without 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
Fix incorrect pg_dump output for some non-default sequence limit values (Alexey Bashtanov)
Changes
Fix pg_dump's mishandling of STATISTICS objects (Tom Lane)
An extended statistics object's schema was mislabeled in the dump's table of contents, possibly leading to the wrong results in a schema-selective restore. Its ownership was not correctly restored, either. Also, change the logic so that statistics objects are dumped/restored, or not, as independent objects rather than tying them to the dump/restore decision for the table they are on. The original definition could not scale to the planned future extension to cross-table statistics.
Changes
Fix incorrect reporting of PL/Python function names in error CONTEXT stacks (Tom Lane)
An error occurring within a nested PL/Python function call (that is, one reached via a SPI query from another PL/Python function) would result in a stack trace showing the inner function's name twice, rather than the expected results. Also, an error in a nested PL/Python DO block could result in a null pointer dereference 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
Allow contrib/auto_explain's log_min_duration setting to range up to INT_MAX, or about 24 days instead of 35 minutes (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
Mark assorted GUC variables as PGDLLIMPORT, to ease porting extension modules to Windows (Metin Doslu)
“Same change” 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 10.X.
However, if you use contrib/cube's ~> operator, see the entry below about that.
Also, if you are upgrading from a version earlier than 10.1, see Section E.23.
Changes
Fix processing of partition keys containing multiple expressions (Álvaro Herrera, David Rowley)
This error led to crashes or, with carefully crafted input, disclosure of arbitrary backend memory. (CVE-2018-1052)
Changes
Ensure that all temporary files made by pg_upgrade are non-world-readable (Tom Lane, Noah Misch)
pg_upgrade normally restricts its temporary files to be readable and writable only by the calling user. But the temporary file containing pg_dumpall -g output would be group- or world-readable, or even writable, if the user's umask setting allows. In typical usage on multi-user machines, the umask and/or the working directory's permissions would be tight enough to prevent problems; but there may be people using pg_upgrade in scenarios where this oversight would permit disclosure of database passwords to unfriendly eyes. (CVE-2018-1053)
“Same change” requires 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 vacuuming of tuples that were updated while key-share locked (Andres Freund, Álvaro Herrera)
In some cases VACUUM would fail to remove such tuples even though they are now dead, leading to assorted data corruption 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
Fix failure to mark a hash index's metapage dirty after adding a new overflow page, potentially leading to index corruption (Lixian Zou, Amit Kapila)
Changes
Ensure that vacuum will always clean up the pending-insertions list of a GIN index (Masahiko Sawada)
This is necessary to ensure that dead index entries get removed. The old code got it backwards, allowing vacuum to skip the cleanup if some other process were running cleanup concurrently, thus risking invalid entries being left behind in the 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
Fix inadequate buffer locking in some LSN fetches (Jacob Champion, Asim Praveen, Ashwin Agrawal)
These errors could result in misbehavior under concurrent load. The potential consequences have not been characterized fully.
“Same change” requires 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 query results from cases involving flattening of subqueries whose outputs are used in GROUPING SETS (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 list partitioning constraints for partition keys of boolean or array types (Amit Langote)
Changes
Avoid unnecessary failure in a query on an inheritance tree that occurs concurrently with some child table being removed from the tree by ALTER TABLE NO INHERIT (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 spurious deadlock failures when multiple sessions are running CREATE INDEX CONCURRENTLY (Jeff Janes)
“Same change” requires complete matching evidence. “Related commits” can cover independent changes, a partial backport, or a follow-up correction; each release keeps its own explanation.
Changes
During VACUUM FULL, update the table's size fields in pg_class sooner (Amit Kapila)
This prevents poor behavior when rebuilding hash indexes on the table, since those use the pg_class statistics to govern the initial hash size.
Changes
Fix UNION/INTERSECT/EXCEPT over zero columns (Tom Lane)
Changes
Disallow identity columns on typed tables and partitions (Michael Paquier)
These cases will be treated as unsupported features for now.
Changes
Fix assorted failures to apply the correct default value when inserting into an identity column (Michael Paquier, Peter Eisentraut)
In several contexts, notably COPY and ALTER TABLE ADD COLUMN, the expected default value was not applied and instead a null value was inserted.
Changes
Fix failures when an inheritance tree contains foreign child tables (Etsuro Fujita)
A mix of regular and foreign tables in an inheritance tree resulted in creation of incorrect plans for UPDATE and DELETE queries. This led to visible failures in some cases, notably when there are row-level triggers on a foreign child 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
Repair failure with correlated sub-SELECT inside VALUES inside a LATERAL subquery (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 “could not devise a query plan for the given query” planner failure for some cases involving nested UNION ALL inside a lateral subquery (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 functional dependency statistics to be used for boolean columns (Tom Lane)
Previously, although extended statistics could be declared and collected on boolean columns, the planner failed to apply them.
Changes
Avoid underestimating the number of groups emitted by subqueries containing set-returning functions in their grouping columns (Tom Lane)
Cases similar to SELECT DISTINCT unnest(foo) got a lower output rowcount estimate in 10.0 than they did in earlier releases, possibly resulting in unfavorable plan choices. Restore the prior estimation behavior.
Changes
Fix use of triggers in logical replication workers (Petr Jelinek)
Changes
Fix logical decoding to correctly clean up disk files for crashed transactions (Atsushi Torikoshi)
Logical decoding may spill WAL records to disk for transactions generating many WAL records. Normally these files are cleaned up after the transaction's commit or abort record arrives; but if no such record is ever seen, the removal code misbehaved.
“Same change” requires 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 walsender timeout failure and failure to respond to interrupts when processing a large transaction (Petr Jelinek)
“Same change” requires 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 replication origin drop that could allow the dropping process to wait indefinitely (Tom Lane)
Changes
Allow members of the pg_read_all_stats role to see walsender statistics in the pg_stat_replication view (Feike Steenbergen)
Changes
Show walsenders that are sending base backups as active in the pg_stat_activity view (Magnus Hagander)
Changes
Fix reporting of scram-sha-256 authentication method in the pg_hba_file_rules view (Michael Paquier)
Previously this was printed as scram-sha256, possibly confusing users as to the correct spelling.
Changes
Fix has_sequence_privilege() to support WITH GRANT OPTION tests, as other privilege-testing functions do (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
In databases using UTF8 encoding, ignore any XML declaration that asserts a different encoding (Pavel Stehule, Noah Misch)
We always store XML strings in the database encoding, so allowing libxml to act on a declaration of another encoding gave wrong results. In encodings other than UTF8, we don't promise to support non-ASCII XML data anyway, so retain the previous behavior for bug compatibility. This change affects only xpath() and related functions; other XML code paths already acted this way.
“Same change” requires 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 for forward compatibility with future minor protocol versions (Robert Haas, Badrul Chowdhury)
Up to now, PostgreSQL servers simply rejected requests to use protocol versions newer than 3.0, so that there was no functional difference between the major and minor parts of the protocol version number. Allow clients to request versions 3.x without failing, sending back a message showing that the server only understands 3.0. This makes no difference at the moment, but back-patching this change should allow speedier introduction of future minor protocol upgrades.
“Same change” requires 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 a client that supports SCRAM channel binding (such as v11 or later libpq) to connect to a v10 server (Michael Paquier)
v10 does not have this feature, and the connection-time negotiation about whether to use it was done incorrectly.
Changes
Avoid live-lock in ConditionVariableBroadcast() (Tom Lane, Thomas Munro)
Given repeatedly-unlucky timing, a process attempting to awaken all waiters for a condition variable could loop indefinitely. Due to the limited usage of condition variables in v10, this affects only parallel index scans and some operations on replication slots.
Changes
Clean up waits for condition variables correctly during subtransaction abort (Robert Haas)
Changes
Ensure that child processes that are waiting for a condition variable will exit promptly if the postmaster process dies (Tom Lane)
Changes
Fix crashes in parallel queries using more than one Gather node (Thomas Munro)
Changes
Fix hang in parallel index scan when processing a deleted or half-dead index page (Amit Kapila)
Changes
Avoid crash if parallel bitmap heap scan is unable to allocate a shared memory segment (Robert Haas)
Changes
Cope with failure to start a parallel worker process (Amit Kapila, Robert Haas)
Parallel query previously tended to hang indefinitely if a worker could not be started, as the result of fork() failure or other low-probability 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
Avoid unnecessary failure when no parallel workers can be obtained during parallel query startup (Robert Haas)
Changes
Fix collection of EXPLAIN statistics from parallel workers (Amit Kapila, 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 query strings passed to parallel workers are correctly null-terminated (Thomas Munro)
This prevents emitting garbage in postmaster log output from such workers.
Changes
Avoid unsafe alignment assumptions when working with __int128 (Tom Lane)
Typically, compilers assume that __int128 variables are aligned on 16-byte boundaries, but our memory allocation infrastructure isn't prepared to guarantee that, and increasing the setting of MAXALIGN seems infeasible for multiple reasons. Adjust the code to allow use of __int128 only when we can tell the compiler to assume lesser alignment. The only known symptom of this problem so far is crashes in some parallel aggregation 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
Prevent stack-overflow crashes when planning extremely deeply nested set operations (UNION/INTERSECT/EXCEPT) (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 crash during an EvalPlanQual recheck of an indexscan that is the inner child of a merge join (Tom Lane)
This could only happen during an update or SELECT FOR UPDATE of a join, when there is a concurrent update of some selected row.
Changes
Fix crash in autovacuum when extended statistics are defined for a table but can't be computed (Álvaro Herrera)
Changes
Fix null-pointer crashes for some types of LDAP URLs appearing in pg_hba.conf (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
Prevent out-of-memory failures due to excessive growth of simple hash tables (Tomas Vondra, Andres Freund)
Changes
Fix sample INSTR() functions in the PL/pgSQL documentation (Yugo Nagata, Tom Lane)
These functions are stated to be Oracle® compatible, but they weren't exactly. In particular, there was a discrepancy in the interpretation of a negative third parameter: Oracle thinks that a negative value indicates the last place where the target substring can begin, whereas our functions took it as the last place where the target can end. Also, Oracle throws an error for a zero or negative fourth parameter, whereas our functions returned zero.
The sample code has been adjusted to match Oracle's behavior more precisely. Users who have copied this code into their applications may wish to update their copies.
“Same change” requires 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 make ACL (permissions), comment, and security label entries reliably identifiable in archive output formats (Tom Lane)
The “tag” portion of an ACL archive entry was usually just the name of the associated object. Make it start with the object type instead, bringing ACLs into line with the convention already used for comment and security label archive entries. Also, fix the comment and security label entries for the whole database, if present, to make their tags start with DATABASE so that they also follow this convention. This prevents false matches in code that tries to identify large-object-related entries by seeing if the tag starts with LARGE OBJECT. That could have resulted in misclassifying entries as data rather than schema, with undesirable results in a schema-only or data-only dump.
Note that this change has user-visible results in the output of pg_restore --list.
“Same change” requires 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 pg_rewind's copy_file_range function to avoid conflict with new Linux system call of that name (Andres Freund)
This change prevents build failures with newer glibc 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
In ecpg, detect indicator arrays that do not have the correct length and report an error (David Rader)
“Same change” requires 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 the behavior of contrib/cube's cube ~> int operator to make it compatible with KNN search (Alexander Korotkov)
The meaning of the second argument (the dimension selector) has been changed to make it predictable which value is selected even when dealing with cubes of varying dimensionalities.
This is an incompatible change, but since the point of the operator was to be used in KNN searches, it seems rather useless as-is. After installing this update, any expression indexes or materialized views using this operator will need to be reindexed/refreshed.
“Same change” requires 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 triggering a libc assertion in contrib/hstore, due to use of memcpy() with equal source and destination pointers (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
Fix incorrect display of tuples' null bitmaps in contrib/pageinspect (Maksim Milyutin)
“Same change” requires 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 from contrib/pageinspect's hash_page_items() function (Masahiko Sawada)
Changes
In contrib/postgres_fdw, avoid “outer pathkeys do not match mergeclauses” planner error when constructing a plan involving a remote join (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
In contrib/postgres_fdw, avoid planner failure when there are duplicate GROUP BY entries (Jeevan Chalke)
Changes
Provide modern examples of how to auto-start Postgres on macOS (Tom Lane)
The scripts in contrib/start-scripts/osx use infrastructure that's been deprecated for over a decade, and which no longer works at all in macOS releases of the last couple of years. Add a new subdirectory contrib/start-scripts/macos containing scripts that use the newer launchd infrastructure.
“Same change” requires 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 selection of configuration-specific libraries for OpenSSL 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
Support linking to MinGW-built versions of libperl (Noah Misch)
This allows building PL/Perl with some common Perl distributions for Windows.
“Same change” requires 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 to test whether 32-bit libperl needs -D_USE_32BIT_TIME_T (Noah Misch)
Available Perl distributions are inconsistent about what they expect, and lack any reliable means of reporting it, so resort to a build-time test on what the library being used actually does.
“Same change” requires 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, install the crash dump handler earlier in postmaster startup (Takayuki Tsunakawa)
This may allow collection of a core dump for some early-startup failures that did not produce a dump before.
“Same change” requires 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 encoding-conversion-related crashes when emitting messages very early in postmaster startup (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
Use our existing Motorola 68K spinlock code on OpenBSD as well as NetBSD (David Carlier)
“Same change” requires 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 spinlocks on Motorola 88K (David Carlier)
“Same change” requires 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 2018c for DST law changes in Brazil, Sao Tome and Principe, plus historical corrections for Bolivia, Japan, and South Sudan. The US/Pacific-New zone has been removed (it was only an alias for America/Los_Angeles 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.
A dump/restore is not required for those running 10.X.
However, if you use BRIN indexes, see the fourth changelog entry below.
Changes
Ensure that INSERT ... ON CONFLICT DO UPDATE checks table permissions and RLS policies in all cases (Dean Rasheed)
The update path of INSERT ... ON CONFLICT DO UPDATE requires SELECT permission on the columns of the arbiter index, but it failed to check for that in the case of an arbiter specified by constraint name. In addition, for a table with row level security enabled, it failed to check updated rows against the table's SELECT policies (regardless of how the arbiter index was specified). (CVE-2017-15099)
“Same change” requires 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 due to rowtype mismatch in json{b}_populate_recordset() (Michael Paquier, Tom Lane)
These functions used the result rowtype specified in the FROM ... AS clause without checking that it matched the actual rowtype of the supplied tuple value. If it didn't, that would usually result in a crash, though disclosure of server memory contents seems possible as well. (CVE-2017-15098)
“Same change” requires 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 sample server-start scripts to become $PGUSER before opening $PGLOG (Noah Misch)
Previously, the postmaster log file was opened while still running as root. The database owner could therefore mount an attack against another system user by making $PGLOG be a symbolic link to some other file, which would then become corrupted by appending log messages.
By default, these scripts are not installed anywhere. Users who have made use of them will need to manually recopy them, or apply the same changes to their modified versions. If the existing $PGLOG file is root-owned, it will need to be removed or renamed out of the way before restarting the server with the corrected script. (CVE-2017-12172)
“Same change” requires 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 summarization to handle concurrent table extension correctly (Álvaro Herrera)
Previously, a race condition allowed some table rows to be omitted from the index. It may be necessary to reindex existing BRIN indexes to recover from past occurrences of this 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 possible failures during concurrent updates of a BRIN index (Tom Lane)
These race conditions could result in errors like “invalid index offnum” or “inconsistent range map”.
“Same change” requires 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 logical replication from setting non-replicated columns to nulls when replicating an UPDATE (Petr Jelinek)
Changes
Fix logical replication to fire BEFORE ROW DELETE triggers when expected (Masahiko Sawada)
Previously, that failed to happen unless the table also had a BEFORE ROW UPDATE trigger.
Changes
Fix crash when logical decoding is invoked from a SPI-using function, in particular any function written in a PL language (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 CTEs when looking up the target table for INSERT/UPDATE/DELETE, and prevent matching schema-qualified target table names to trigger transition table names (Thomas Munro)
This restores the pre-v10 behavior for CTEs attached to DML commands.
Changes
Avoid evaluating an aggregate function's argument expression(s) at rows where its FILTER test fails (Tom Lane)
This restores the pre-v10 (and SQL-standard) behavior.
Changes
Fix incorrect query results when multiple GROUPING SETS columns contain the same simple variable (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 query-lifespan memory leakage while evaluating a set-returning function in a SELECT's target list (Tom Lane)
Changes
Allow parallel execution of prepared statements with generic plans (Amit Kapila, Kuntal Ghosh)
Changes
Fix incorrect parallelization decisions for nested queries (Amit Kapila, Kuntal Ghosh)
“Same change” requires 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 parallel query handling to not fail when a recently-used role is dropped (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
Fix crash in parallel execution of a bitmap scan having a BitmapAnd plan node below a BitmapOr node (Dilip Kumar)
Changes
Fix json_build_array(), json_build_object(), and their jsonb equivalents to handle explicit VARIADIC arguments correctly (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 autovacuum's “work item” logic to prevent possible crashes and silent loss of work items (Álvaro Herrera)
Changes
Fix corner-case crashes when columns have been added to the end of 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
Record proper dependencies when a view or rule contains FieldSelect or FieldStore expression nodes (Tom Lane)
Lack of these dependencies could allow a column or data type DROP to go through when it ought to fail, thereby causing later uses of the view or rule to get errors. This patch does not do anything to protect existing views/rules, only ones created in the future.
“Same change” requires 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 detect hashability of range data types (Tom Lane)
The planner mistakenly assumed that any range type could be hashed for use in hash joins or hash aggregation, but actually it must check whether the range's subtype has hash support. This does not affect any of the built-in range types, since they're all hashable 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
Correctly ignore RelabelType expression nodes when examining functional-dependency statistics (David Rowley)
This allows, e.g., extended statistics on varchar columns to be used properly.
Changes
Prevent sharing transition states between ordered-set aggregates (David Rowley)
This causes a crash with the built-in ordered-set aggregates, and probably with user-written ones as well. v11 and later will include provisions for dealing with such cases safely, but in released branches, just disable the optimization.
“Same change” requires 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 idle_in_transaction_session_timeout from being ignored when a statement_timeout occurred earlier (Lukas Fittl)
“Same change” requires 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 low-probability loss of NOTIFY messages due to XID wraparound (Marko Tiikkaja, Tom Lane)
If a session executed no queries, but merely listened for notifications, for more than 2 billion transactions, it started to miss some notifications from concurrently-committing transactions.
“Same change” requires 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 the frequency of data flush requests during bulk file copies to avoid performance problems on macOS, particularly with its new APFS file system (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 COPY's FREEZE option to work when the transaction isolation level is REPEATABLE READ or higher (Noah Misch)
This case was unintentionally broken by a previous bug fix.
“Same change” requires 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 AggGetAggref() to return the correct Aggref nodes to aggregate final functions whose transition calculations have been merged (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 insufficient schema-qualification in some new queries in pg_dump and psql (Vitaly Burovoy, Tom Lane, Noah Misch)
Changes
Avoid use of @> operator in psql's queries for \d (Tom Lane)
This prevents problems when the parray_gin extension is installed, since that defines a conflicting operator.
Changes
Fix pg_basebackup's matching of tablespace paths to canonicalize both paths before comparing (Michael Paquier)
This is particularly helpful on Windows.
“Same change” requires 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 libpq to not require user's home directory to exist (Tom Lane)
In v10, failure to find the home directory while trying to read ~/.pgpass was treated as a hard error, but it should just cause that file to not be found. Both v10 and previous release branches made the same mistake when reading ~/.pg_service.conf, though this was less obvious since that file is not sought unless a service name is specified.
“Same change” requires 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, correctly handle backslashes in string literals depending on whether standard_conforming_strings is set (Tsunakawa Takayuki)
“Same change” requires 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 ecpglib's Informix-compatibility mode ignore fractional digits in integer input strings, as expected (Gao Zengqi, Michael Meskes)
“Same change” requires 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 missing temp-install prerequisites for check-like Make targets (Noah Misch)
Some non-default test procedures that are meant to work like make check failed to ensure that the temporary installation was up to date.
“Same change” requires 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 2017c for DST law changes in Fiji, Namibia, Northern Cyprus, Sudan, Tonga, and Turks & Caicos Islands, plus historical corrections for Alaska, Apia, Burma, Calcutta, Detroit, Ireland, Namibia, and Pago Pago.
“Same change” requires 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 the documentation, restore HTML anchors to being upper-case strings (Peter Eisentraut)
Due to a toolchain change, the 10.0 user manual had lower-case strings for intrapage anchors, thus breaking some external links into our website documentation. Return to our previous convention of using upper-case strings.
Try another search, or .
The comparison follows PostgreSQL release notes from just after the source through the target version. For a major upgrade, maintenance releases from each older branch are included only up to the next major release date, and never after the target date. A major version such as 18 means its initial release, 18.0. Previews and development snapshots are labeled separately.
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Fixes can be backported to several branches. Confirmed duplicates are merged conservatively, with every branch explanation retained. A note describing several independent fixes is excluded only when all are already present in the source. Major-release features remain distinct from related maintenance patches unless their complete original descriptions match. Uncertain matches are retained. This is a release-note history, not an exhaustive comparison of compiled binaries.
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