PostgreSQL 9.4

Release history

Every indexed release keeps its original occurrences. CVE counts below are mentions in its notes, including follow-up corrections; they do not count newly fixed vulnerabilities.

Initial release changes

Original entries from 9.4.0, including feature changes and compatibility notes. Categories aid browsing; they are not upstream classifications.

211 of 211 original entries.

• Tighten checks for multidimensional array input Compatibility Migration

  Tighten checks for multidimensional array input (Bruce Momjian)

  Previously, an input array string that started with a single-element sub-array could later contain multi-element sub-arrays, e.g. '{{1}, {2,3}}'::int[] would be accepted.

  Original release occurrence · 9.4.0/migration/001

• When converting values of type date, timestamp or timestamptz to JSON, render the values in a format compliant with ISO 8601 Compatibility Migration

  When converting values of type date, timestamp or timestamptz to JSON, render the values in a format compliant with ISO 8601 (Andrew Dunstan)

  Previously such values were rendered according to the current DateStyle setting; but many JSON processors require timestamps to be in ISO 8601 format. If necessary, the previous behavior can be obtained by explicitly casting the datetime value to text before passing it to the JSON conversion function.

  Original release occurrence · 9.4.0/migration/002

• The json #> text[] path extraction operator now returns its lefthand input, not NULL, if the array is empty Compatibility Migration

  The json #> text[] path extraction operator now returns its lefthand input, not NULL, if the array is empty (Tom Lane)

  This is consistent with the notion that this represents zero applications of the simple field/element extraction operator ->. Similarly, json #>> text[] with an empty array merely coerces its lefthand input to text.

  Original release occurrence · 9.4.0/migration/003

• Corner cases in the JSON field/element/path extraction operators now return NULL rather than raising an error Compatibility Migration

  Corner cases in the JSON field/element/path extraction operators now return NULL rather than raising an error (Tom Lane)

  For example, applying field extraction to a JSON array now yields NULL not an error. This is more consistent (since some comparable cases such as no-such-field already returned NULL), and it makes it safe to create expression indexes that use these operators, since they will now not throw errors for any valid JSON input.

  Original release occurrence · 9.4.0/migration/004

• Cause consecutive whitespace in to_timestamp() and to_date() format strings to consume a corresponding number of characters in the input string (whitespace or not), then conditionally consume adjacent whitespace, if not in FX mode Compatibility Migration

  Cause consecutive whitespace in to_timestamp() and to_date() format strings to consume a corresponding number of characters in the input string (whitespace or not), then conditionally consume adjacent whitespace, if not in FX mode (Jeevan Chalke)

  Previously, consecutive whitespace characters in a non-FX format string behaved like a single whitespace character and consumed all adjacent whitespace in the input string. For example, previously a format string of three spaces would consume only the first space in ' 12', but it will now consume all three characters.

  Original release occurrence · 9.4.0/migration/005

• Fix ts_rank_cd() to ignore stripped lexemes Compatibility Migration

  Fix ts_rank_cd() to ignore stripped lexemes (Alex Hill)

  Previously, stripped lexemes were treated as if they had a default location, producing a rank of dubious usefulness.

  Original release occurrence · 9.4.0/migration/006

• For functions declared to take VARIADIC "any", an actual parameter marked as VARIADIC must be of a determinable array type Compatibility Migration

  For functions declared to take VARIADIC "any", an actual parameter marked as VARIADIC must be of a determinable array type (Pavel Stehule)

  Such parameters can no longer be written as an undecorated string literal or NULL; a cast to an appropriate array data type will now be required. Note that this does not affect parameters not marked VARIADIC.

  Original release occurrence · 9.4.0/migration/007

• Ensure that whole-row variables expose the expected column names to functions that pay attention to column names within composite arguments Compatibility Migration

  Ensure that whole-row variables expose the expected column names to functions that pay attention to column names within composite arguments (Tom Lane)

  Constructs like row_to_json(tab.*) now always emit column names that match the column aliases visible for table tab at the point of the call. In previous releases the emitted column names would sometimes be the table's actual column names regardless of any aliases assigned in the query.

  Original release occurrence · 9.4.0/migration/008

• DISCARD now also discards sequence-related state Compatibility Migration

  DISCARD now also discards sequence-related state (Fabrízio de Royes Mello, Robert Haas)

  Original release occurrence · 9.4.0/migration/009

• Rename EXPLAIN ANALYZE's "total runtime" output to "execution time" Compatibility Migration

  Rename EXPLAIN ANALYZE's "total runtime" output to "execution time" (Tom Lane)

  Now that planning time is also reported, the previous name was confusing.

  Original release occurrence · 9.4.0/migration/010

• SHOW TIME ZONE now outputs simple numeric UTC offsets in POSIX timezone format Compatibility Migration

  SHOW TIME ZONE now outputs simple numeric UTC offsets in POSIX timezone format (Tom Lane)

  Previously, such timezone settings were displayed as interval values. The new output is properly interpreted by SET TIME ZONE when passed as a simple string, whereas the old output required special treatment to be re-parsed correctly.

  Original release occurrence · 9.4.0/migration/011

• Foreign data wrappers that support updating foreign tables must consider the possible presence of AFTER ROW triggers Compatibility Migration

  Foreign data wrappers that support updating foreign tables must consider the possible presence of AFTER ROW triggers (Noah Misch)

  When an AFTER ROW trigger is present, all columns of the table must be returned by updating actions, since the trigger might inspect any or all of them. Previously, foreign tables never had triggers, so the FDW might optimize away fetching columns not mentioned in the RETURNING clause (if any).

  Original release occurrence · 9.4.0/migration/012

• Prevent CHECK constraints from referencing system columns, except tableoid Compatibility Migration

  Prevent CHECK constraints from referencing system columns, except tableoid (Amit Kapila)

  Previously such check constraints were allowed, but they would often cause errors during restores.

  Original release occurrence · 9.4.0/migration/013

• Use the last specified recovery target parameter if multiple target parameters are specified Compatibility Migration

  Use the last specified recovery target parameter if multiple target parameters are specified (Heikki Linnakangas)

  Previously, there was an undocumented precedence order among the recovery_target_xxx parameters.

  Original release occurrence · 9.4.0/migration/014

• On Windows, automatically preserve quotes in command strings supplied by the user Compatibility Migration

  On Windows, automatically preserve quotes in command strings supplied by the user (Heikki Linnakangas)

  User commands that did their own quote preservation might need adjustment. This is likely to be an issue for commands used in archive_command, restore_command, and COPY TO/FROM PROGRAM.

  Original release occurrence · 9.4.0/migration/015

• Remove catalog column pg_class.reltoastidxid Compatibility Migration

  Remove catalog column pg_class.reltoastidxid (Michael Paquier)

  Original release occurrence · 9.4.0/migration/016

• Remove catalog column pg_rewrite.ev_attr Compatibility Migration

  Remove catalog column pg_rewrite.ev_attr (Kevin Grittner)

  Per-column rules have not been supported since PostgreSQL 7.3.

  Original release occurrence · 9.4.0/migration/017

• Remove native support for Kerberos authentication (--with-krb5, etc) Compatibility Migration

  Remove native support for Kerberos authentication (--with-krb5, etc) (Magnus Hagander)

  The supported way to use Kerberos authentication is with GSSAPI. The native code has been deprecated since PostgreSQL 8.3.

  Original release occurrence · 9.4.0/migration/018

• In PL/Python, handle domains over arrays like the underlying array type Compatibility Migration

  In PL/Python, handle domains over arrays like the underlying array type (Rodolfo Campero)

  Previously such values were treated as strings.

  Original release occurrence · 9.4.0/migration/019

• Make libpq's PQconnectdbParams() and PQpingParams() functions process zero-length strings as defaults Compatibility Migration

  Make libpq's PQconnectdbParams() and PQpingParams() functions process zero-length strings as defaults (Adrian Vondendriesch)

  Previously, these functions treated zero-length string values as selecting the default in only some cases.

  Original release occurrence · 9.4.0/migration/020

• Change empty arrays returned by the intarray module to be zero-dimensional arrays Compatibility Migration

  Change empty arrays returned by the intarray module to be zero-dimensional arrays (Bruce Momjian)

  Previously, empty arrays were returned as zero-length one-dimensional arrays, whose text representation looked the same as zero-dimensional arrays ({}), but they acted differently in array operations. intarray's behavior in this area now matches the built-in array operators.

  Original release occurrence · 9.4.0/migration/021

• pg_upgrade now uses -U or --username to specify the user name Compatibility Migration

  pg_upgrade now uses -U or --username to specify the user name (Bruce Momjian)

  Previously this option was spelled -u or --user, but that was inconsistent with other tools.

  Original release occurrence · 9.4.0/migration/022

• Allow background worker processes to be dynamically registered, started and terminated Features

  Allow background worker processes to be dynamically registered, started and terminated (Robert Haas)

  The new worker_spi module shows an example of use of this feature.

  Original release occurrence · 9.4.0/changes/001

• Allow dynamic allocation of shared memory segments Features

  Allow dynamic allocation of shared memory segments (Robert Haas, Amit Kapila)

  This feature is illustrated in the test_shm_mq module.

  Original release occurrence · 9.4.0/changes/002

• During crash recovery or immediate shutdown, send uncatchable termination signals (SIGKILL) to child processes that do not shut down promptly Features

  During crash recovery or immediate shutdown, send uncatchable termination signals (SIGKILL) to child processes that do not shut down promptly (MauMau, Álvaro Herrera)

  This reduces the likelihood of leaving orphaned child processes behind after postmaster shutdown, as well as ensuring that crash recovery can proceed if some child processes have become "stuck".

  Original release occurrence · 9.4.0/changes/003

• Improve randomness of the database system identifier Features

  Improve randomness of the database system identifier (Tom Lane)

  Original release occurrence · 9.4.0/changes/004

• Make VACUUM properly report dead but not-yet-removable rows to the statistics collector Features

  Make VACUUM properly report dead but not-yet-removable rows to the statistics collector (Hari Babu)

  Previously these were reported as live rows.

  Original release occurrence · 9.4.0/changes/005

• Reduce GIN index size Features

  Reduce GIN index size (Alexander Korotkov, Heikki Linnakangas)

  Indexes upgraded via pg_upgrade will work fine but will still be in the old, larger GIN format. Use REINDEX to recreate old GIN indexes in the new format.

  Original release occurrence · 9.4.0/changes/006

• Improve speed of multi-key GIN lookups Features

  Improve speed of multi-key GIN lookups (Alexander Korotkov, Heikki Linnakangas)

  Original release occurrence · 9.4.0/changes/007

• Add GiST index support for inet and cidr data types Features

  Add GiST index support for inet and cidr data types (Emre Hasegeli)

  Such indexes improve subnet and supernet lookups and ordering comparisons.

  Original release occurrence · 9.4.0/changes/008

• Fix rare race condition in B-tree page deletion Bug fixes

  Fix rare race condition in B-tree page deletion (Heikki Linnakangas)

  Original release occurrence · 9.4.0/changes/009

• Make the handling of interrupted B-tree page splits more robust Features

  Make the handling of interrupted B-tree page splits more robust (Heikki Linnakangas)

  Original release occurrence · 9.4.0/changes/010

• Allow multiple backends to insert into WAL buffers concurrently Performance

  Allow multiple backends to insert into WAL buffers concurrently (Heikki Linnakangas)

  This improves parallel write performance.

  Original release occurrence · 9.4.0/changes/011

• Conditionally write only the modified portion of updated rows to WAL Performance

  Conditionally write only the modified portion of updated rows to WAL (Amit Kapila)

  Original release occurrence · 9.4.0/changes/012

• Improve performance of aggregate functions used as window functions Performance

  Improve performance of aggregate functions used as window functions (David Rowley, Florian Pflug, Tom Lane)

  Original release occurrence · 9.4.0/changes/013

• Improve speed of aggregates that use numeric state values Performance

  Improve speed of aggregates that use numeric state values (Hadi Moshayedi)

  Original release occurrence · 9.4.0/changes/014

• Attempt to freeze tuples when tables are rewritten with CLUSTER or VACUUM FULL Performance

  Attempt to freeze tuples when tables are rewritten with CLUSTER or VACUUM FULL (Robert Haas, Andres Freund)

  This can avoid the need to freeze the tuples in the future.

  Original release occurrence · 9.4.0/changes/015

• Improve speed of COPY with default nextval() columns Performance

  Improve speed of COPY with default nextval() columns (Simon Riggs)

  Original release occurrence · 9.4.0/changes/016

• Improve speed of accessing many different sequences in the same session Performance

  Improve speed of accessing many different sequences in the same session (David Rowley)

  Original release occurrence · 9.4.0/changes/017

• Raise hard limit on the number of tuples held in memory during sorting and B-tree index builds Performance

  Raise hard limit on the number of tuples held in memory during sorting and B-tree index builds (Noah Misch)

  Original release occurrence · 9.4.0/changes/018

• Reduce memory allocated by PL/pgSQL DO blocks Performance

  Reduce memory allocated by PL/pgSQL DO blocks (Tom Lane)

  Original release occurrence · 9.4.0/changes/019

• Make the planner more aggressive about extracting restriction clauses from mixed AND/OR clauses Performance

  Make the planner more aggressive about extracting restriction clauses from mixed AND/OR clauses (Tom Lane)

  Original release occurrence · 9.4.0/changes/020

• Disallow pushing volatile WHERE clauses down into DISTINCT subqueries Performance

  Disallow pushing volatile WHERE clauses down into DISTINCT subqueries (Tom Lane)

  Pushing down a WHERE clause can produce a more efficient plan overall, but at the cost of evaluating the clause more often than is implied by the text of the query; so don't do it if the clause contains any volatile functions.

  Original release occurrence · 9.4.0/changes/021

• Auto-resize the catalog caches Performance

  Auto-resize the catalog caches (Heikki Linnakangas)

  This reduces memory consumption for sessions accessing only a few tables, and improves performance for sessions accessing many tables.

  Original release occurrence · 9.4.0/changes/022

• Add pg_stat_archiver system view to report WAL archiver activity Features

  Add pg_stat_archiver system view to report WAL archiver activity (Gabriele Bartolini)

  Original release occurrence · 9.4.0/changes/023

• Add n_mod_since_analyze columns to pg_stat_all_tables and related system views Features

  Add n_mod_since_analyze columns to pg_stat_all_tables and related system views (Mark Kirkwood)

  These columns expose the system's estimate of the number of changed tuples since the table's last ANALYZE. This estimate drives decisions about when to auto-analyze.

  Original release occurrence · 9.4.0/changes/024

• Add backend_xid and backend_xmin columns to the system view pg_stat_activity, and a backend_xmin column to pg_stat_replication Features

  Add backend_xid and backend_xmin columns to the system view pg_stat_activity, and a backend_xmin column to pg_stat_replication (Christian Kruse)

  Original release occurrence · 9.4.0/changes/025

• Add support for SSL ECDH key exchange Features

  Add support for SSL ECDH key exchange (Marko Kreen)

  This allows use of Elliptic Curve keys for server authentication. Such keys are faster and have better security than RSA keys. The new configuration parameter ssl_ecdh_curve controls which curve is used for ECDH.

  Original release occurrence · 9.4.0/changes/026

• Improve the default ssl_ciphers setting Features

  Improve the default ssl_ciphers setting (Marko Kreen)

  Original release occurrence · 9.4.0/changes/027

• By default, the server not the client now controls the preference order of SSL ciphers Features

  By default, the server not the client now controls the preference order of SSL ciphers (Marko Kreen)

  Previously, the order specified by ssl_ciphers was usually ignored in favor of client-side defaults, which are not configurable in most PostgreSQL clients. If desired, the old behavior can be restored via the new configuration parameter ssl_prefer_server_ciphers.

  Original release occurrence · 9.4.0/changes/028

• Make log_connections show SSL encryption information Features

  Make log_connections show SSL encryption information (Andreas Kunert)

  Original release occurrence · 9.4.0/changes/029

• Improve SSL renegotiation handling Features

  Improve SSL renegotiation handling (Álvaro Herrera)

  Original release occurrence · 9.4.0/changes/030

• Add new SQL command ALTER SYSTEM for changing postgresql.conf configuration file entries Features

  Add new SQL command ALTER SYSTEM for changing postgresql.conf configuration file entries (Amit Kapila)

  Previously such settings could only be changed by manually editing postgresql.conf.

  Original release occurrence · 9.4.0/changes/031

• Add autovacuum_work_mem configuration parameter to control the amount of memory used by autovacuum workers Features

  Add autovacuum_work_mem configuration parameter to control the amount of memory used by autovacuum workers (Peter Geoghegan)

  Original release occurrence · 9.4.0/changes/032

• Add huge_pages parameter to allow using huge memory pages on Linux Features

  Add huge_pages parameter to allow using huge memory pages on Linux (Christian Kruse, Richard Poole, Abhijit Menon-Sen)

  This can improve performance on large-memory systems.

  Original release occurrence · 9.4.0/changes/033

• Add max_worker_processes parameter to limit the number of background workers Features

  Add max_worker_processes parameter to limit the number of background workers (Robert Haas)

  This is helpful in configuring a standby server to have the required number of worker processes (the same as the primary).

  Original release occurrence · 9.4.0/changes/034

• Add superuser-only session_preload_libraries parameter to load libraries at session start Features

  Add superuser-only session_preload_libraries parameter to load libraries at session start (Peter Eisentraut)

  In contrast to local_preload_libraries, this parameter can load any shared library, not just those in the $libdir/plugins directory.

  Original release occurrence · 9.4.0/changes/035

• Add wal_log_hints parameter to enable WAL logging of hint-bit changes Features

  Add wal_log_hints parameter to enable WAL logging of hint-bit changes (Sawada Masahiko)

  Hint bit changes are not normally logged, except when checksums are enabled. This is useful for external tools like pg_rewind.

  Original release occurrence · 9.4.0/changes/036

• Increase the default settings of work_mem and maintenance_work_mem by four times Features

  Increase the default settings of work_mem and maintenance_work_mem by four times (Bruce Momjian)

  The new defaults are 4MB and 64MB respectively.

  Original release occurrence · 9.4.0/changes/037

• Increase the default setting of effective_cache_size to 4GB Features

  Increase the default setting of effective_cache_size to 4GB (Bruce Momjian, Tom Lane)

  Original release occurrence · 9.4.0/changes/038

• Allow printf-style space padding to be specified in log_line_prefix Features

  Allow printf-style space padding to be specified in log_line_prefix (David Rowley)

  Original release occurrence · 9.4.0/changes/039

• Allow terabyte units (TB) to be used when specifying configuration variable values Features

  Allow terabyte units (TB) to be used when specifying configuration variable values (Simon Riggs)

  Original release occurrence · 9.4.0/changes/040

• Show PIDs of lock holders and waiters and improve information about relations in log_lock_waits log messages Features

  Show PIDs of lock holders and waiters and improve information about relations in log_lock_waits log messages (Christian Kruse)

  Original release occurrence · 9.4.0/changes/041

• Reduce server logging level when loading shared libraries Features

  Reduce server logging level when loading shared libraries (Peter Geoghegan)

  The previous level was LOG, which was too verbose for libraries loaded per-session.

  Original release occurrence · 9.4.0/changes/042

• On Windows, make SQL_ASCII-encoded databases and server processes (e.g., postmaster) emit messages in the character encoding of the server's Windows user locale Features

  On Windows, make SQL_ASCII-encoded databases and server processes (e.g., postmaster) emit messages in the character encoding of the server's Windows user locale (Alexander Law, Noah Misch)

  Previously these messages were output in the Windows ANSI code page.

  Original release occurrence · 9.4.0/changes/043

• Add replication slots to coordinate activity on streaming standbys with the node they are streaming from Features

  Add replication slots to coordinate activity on streaming standbys with the node they are streaming from (Andres Freund, Robert Haas)

  Replication slots allow preservation of resources like WAL files on the primary until they are no longer needed by standby servers.

  Original release occurrence · 9.4.0/changes/044

• Add recovery parameter recovery_min_apply_delay to delay replication Features

  Add recovery parameter recovery_min_apply_delay to delay replication (Robert Haas, Fabrízio de Royes Mello, Simon Riggs)

  Delaying replay on standby servers can be useful for recovering from user errors.

  Original release occurrence · 9.4.0/changes/045

• Add recovery_target option immediate to stop WAL recovery as soon as a consistent state is reached Features

  Add recovery_target option immediate to stop WAL recovery as soon as a consistent state is reached (MauMau, Heikki Linnakangas)

  Original release occurrence · 9.4.0/changes/046

• Improve recovery target processing Features

  Improve recovery target processing (Heikki Linnakangas)

  The timestamp reported by pg_last_xact_replay_timestamp() now reflects already-committed records, not transactions about to be committed. Recovering to a restore point now replays the restore point, rather than stopping just before the restore point.

  Original release occurrence · 9.4.0/changes/047

• pg_switch_xlog() now clears any unused trailing space in the old WAL file Features

  pg_switch_xlog() now clears any unused trailing space in the old WAL file (Heikki Linnakangas)

  This improves the compression ratio for WAL files.

  Original release occurrence · 9.4.0/changes/048

• Report failure return codes from external recovery commands Features

  Report failure return codes from external recovery commands (Peter Eisentraut)

  Original release occurrence · 9.4.0/changes/049

• Reduce spinlock contention during WAL replay Features

  Reduce spinlock contention during WAL replay (Heikki Linnakangas)

  Original release occurrence · 9.4.0/changes/050

• Write WAL records of running transactions more frequently Features

  Write WAL records of running transactions more frequently (Andres Freund)

  This allows standby servers to start faster and clean up resources more aggressively.

  Original release occurrence · 9.4.0/changes/051

• Add support for logical decoding of WAL data, to allow database changes to be streamed out in a customizable format Features

  Add support for logical decoding of WAL data, to allow database changes to be streamed out in a customizable format (Andres Freund)

  Original release occurrence · 9.4.0/changes/052

• Add new wal_level setting logical to enable logical change-set encoding in WAL Features

  Add new wal_level setting logical to enable logical change-set encoding in WAL (Andres Freund)

  Original release occurrence · 9.4.0/changes/053

• Add table-level parameter REPLICA IDENTITY to control logical replication Features

  Add table-level parameter REPLICA IDENTITY to control logical replication (Andres Freund)

  Original release occurrence · 9.4.0/changes/054

• Add relation option user_catalog_table to identify user-created tables involved in logical change-set encoding Features

  Add relation option user_catalog_table to identify user-created tables involved in logical change-set encoding (Andres Freund)

  Original release occurrence · 9.4.0/changes/055

• Add pg_recvlogical application to receive logical-decoding data Features

  Add pg_recvlogical application to receive logical-decoding data (Andres Freund)

  Original release occurrence · 9.4.0/changes/056

• Add test_decoding module to illustrate logical decoding at the SQL level Features

  Add test_decoding module to illustrate logical decoding at the SQL level (Andres Freund)

  Original release occurrence · 9.4.0/changes/057

• Add WITH ORDINALITY syntax to number the rows returned from a set-returning function in the FROM clause Features

  Add WITH ORDINALITY syntax to number the rows returned from a set-returning function in the FROM clause (Andrew Gierth, David Fetter)

  This is particularly useful for functions like unnest().

  Original release occurrence · 9.4.0/changes/058

• Add ROWS FROM() syntax to allow horizontal concatenation of set-returning functions in the FROM clause Features

  Add ROWS FROM() syntax to allow horizontal concatenation of set-returning functions in the FROM clause (Andrew Gierth)

  Original release occurrence · 9.4.0/changes/059

• Allow SELECT to have an empty target list Features

  Allow SELECT to have an empty target list (Tom Lane)

  This was added so that views that select from a table with zero columns can be dumped and restored correctly.

  Original release occurrence · 9.4.0/changes/060

• Ensure that SELECT ... FOR UPDATE NOWAIT does not wait in corner cases involving already-concurrently-updated tuples Features

  Ensure that SELECT ... FOR UPDATE NOWAIT does not wait in corner cases involving already-concurrently-updated tuples (Craig Ringer and Thomas Munro)

  Original release occurrence · 9.4.0/changes/061

• Add DISCARD SEQUENCES command to discard cached sequence-related state Features

  Add DISCARD SEQUENCES command to discard cached sequence-related state (Fabrízio de Royes Mello, Robert Haas)

  DISCARD ALL will now also discard such information.

  Original release occurrence · 9.4.0/changes/062

• Add FORCE NULL option to COPY FROM, which causes quoted strings matching the specified null string to be converted to NULLs in CSV mode Features

  Add FORCE NULL option to COPY FROM, which causes quoted strings matching the specified null string to be converted to NULLs in CSV mode (Ian Barwick, Michael Paquier)

  Without this option, only unquoted matching strings will be imported as null values.

  Original release occurrence · 9.4.0/changes/063

• Issue warnings for commands used outside of transaction blocks when they can have no effect Features

  Issue warnings for commands used outside of transaction blocks when they can have no effect (Bruce Momjian)

  New warnings are issued for SET LOCAL, SET CONSTRAINTS, SET TRANSACTION and ABORT when used outside a transaction block.

  Original release occurrence · 9.4.0/changes/064

• Make EXPLAIN ANALYZE show planning time Features

  Make EXPLAIN ANALYZE show planning time (Andreas Karlsson)

  Original release occurrence · 9.4.0/changes/065

• Make EXPLAIN show the grouping columns in Agg and Group nodes Features

  Make EXPLAIN show the grouping columns in Agg and Group nodes (Tom Lane)

  Original release occurrence · 9.4.0/changes/066

• Make EXPLAIN ANALYZE show exact and lossy block counts in bitmap heap scans Features

  Make EXPLAIN ANALYZE show exact and lossy block counts in bitmap heap scans (Etsuro Fujita)

  Original release occurrence · 9.4.0/changes/067

• Allow a materialized view to be refreshed without blocking other sessions from reading the view meanwhile Features

  Allow a materialized view to be refreshed without blocking other sessions from reading the view meanwhile (Kevin Grittner)

  This is done with REFRESH MATERIALIZED VIEW CONCURRENTLY.

  Original release occurrence · 9.4.0/changes/068

• Allow views to be automatically updated even if they contain some non-updatable columns Features

  Allow views to be automatically updated even if they contain some non-updatable columns (Dean Rasheed)

  Previously the presence of non-updatable output columns such as expressions, literals, and function calls prevented automatic updates. Now INSERTs, UPDATEs and DELETEs are supported, provided that they do not attempt to assign new values to any of the non-updatable columns.

  Original release occurrence · 9.4.0/changes/069

• Allow control over whether INSERTs and UPDATEs can add rows to an auto-updatable view that would not appear in the view Features

  Allow control over whether INSERTs and UPDATEs can add rows to an auto-updatable view that would not appear in the view (Dean Rasheed)

  This is controlled with the new CREATE VIEW clause WITH CHECK OPTION.

  Original release occurrence · 9.4.0/changes/070

• Allow security barrier views to be automatically updatable Features

  Allow security barrier views to be automatically updatable (Dean Rasheed)

  Original release occurrence · 9.4.0/changes/071

• Support triggers on foreign tables Features

  Support triggers on foreign tables (Ronan Dunklau)

  Original release occurrence · 9.4.0/changes/072

• Allow moving groups of objects from one tablespace to another using the ALL IN TABLESPACE ... SET TABLESPACE form of ALTER TABLE, ALTER INDEX, or ALTER MATERIALIZED VIEW Features

  Allow moving groups of objects from one tablespace to another using the ALL IN TABLESPACE ... SET TABLESPACE form of ALTER TABLE, ALTER INDEX, or ALTER MATERIALIZED VIEW (Stephen Frost)

  Original release occurrence · 9.4.0/changes/073

• Allow changing foreign key constraint deferrability via ALTER TABLE ... ALTER CONSTRAINT Features

  Allow changing foreign key constraint deferrability via ALTER TABLE ... ALTER CONSTRAINT (Simon Riggs)

  Original release occurrence · 9.4.0/changes/074

• Reduce lock strength for some ALTER TABLE commands Features

  Reduce lock strength for some ALTER TABLE commands (Simon Riggs, Noah Misch, Robert Haas)

  Specifically, VALIDATE CONSTRAINT, CLUSTER ON, SET WITHOUT CLUSTER, ALTER COLUMN SET STATISTICS, ALTER COLUMN SET (attribute_option), ALTER COLUMN RESET (attribute_option) no longer require ACCESS EXCLUSIVE locks.

  Original release occurrence · 9.4.0/changes/075

• Allow tablespace options to be set in CREATE TABLESPACE Features

  Allow tablespace options to be set in CREATE TABLESPACE (Vik Fearing)

  Formerly these options could only be set via ALTER TABLESPACE.

  Original release occurrence · 9.4.0/changes/076

• Allow CREATE AGGREGATE to define the estimated size of the aggregate's transition state data Features

  Allow CREATE AGGREGATE to define the estimated size of the aggregate's transition state data (Hadi Moshayedi)

  Proper use of this feature allows the planner to better estimate how much memory will be used by aggregates.

  Original release occurrence · 9.4.0/changes/077

• Fix DROP IF EXISTS to avoid errors for non-existent objects in more cases Bug fixes

  Fix DROP IF EXISTS to avoid errors for non-existent objects in more cases (Pavel Stehule, Dean Rasheed)

  Original release occurrence · 9.4.0/changes/078

• Improve how system relations are identified Features

  Improve how system relations are identified (Andres Freund, Robert Haas)

  Previously, relations once moved into the pg_catalog schema could no longer be modified or dropped.

  Original release occurrence · 9.4.0/changes/079

• Fully implement the line data type Features

  Fully implement the line data type (Peter Eisentraut)

  The line segment data type (lseg) has always been fully supported. The previous line data type (which was enabled only via a compile-time option) is not binary or dump-compatible with the new implementation.

  Original release occurrence · 9.4.0/changes/080

• Add pg_lsn data type to represent a WAL log sequence number (LSN) Features

  Add pg_lsn data type to represent a WAL log sequence number (LSN) (Robert Haas, Michael Paquier)

  Original release occurrence · 9.4.0/changes/081

• Allow single-point polygons to be converted to circles Features

  Allow single-point polygons to be converted to circles (Bruce Momjian)

  Original release occurrence · 9.4.0/changes/082

• Support time zone abbreviations that change UTC offset from time to time Features

  Support time zone abbreviations that change UTC offset from time to time (Tom Lane)

  Previously, PostgreSQL assumed that the UTC offset associated with a time zone abbreviation (such as EST) never changes in the usage of any particular locale. However this assumption fails in the real world, so introduce the ability for a zone abbreviation to represent a UTC offset that sometimes changes. Update the zone abbreviation definition files to make use of this feature in timezone locales that have changed the UTC offset of their abbreviations since 1970 (according to the IANA timezone database). In such timezones, PostgreSQL will now associate the correct UTC offset with the abbreviation depending on the given date.

  Original release occurrence · 9.4.0/changes/083

• Allow 5+ digit years for non-ISO timestamp and date strings, where appropriate Features

  Allow 5+ digit years for non-ISO timestamp and date strings, where appropriate (Bruce Momjian)

  Original release occurrence · 9.4.0/changes/084

• Add checks for overflow/underflow of interval values Features

  Add checks for overflow/underflow of interval values (Bruce Momjian)

  Original release occurrence · 9.4.0/changes/085

• Add jsonb, a more capable and efficient data type for storing JSON data Features

  Add jsonb, a more capable and efficient data type for storing JSON data (Oleg Bartunov, Teodor Sigaev, Alexander Korotkov, Peter Geoghegan, Andrew Dunstan)

  This new type allows faster access to values within a JSON document, and faster and more useful indexing of JSON columns. Scalar values in jsonb documents are stored as appropriate scalar SQL types, and the JSON document structure is pre-parsed rather than being stored as text as in the original json data type.

  Original release occurrence · 9.4.0/changes/086

• Add new JSON functions to allow for the construction of arbitrarily complex JSON trees Features

  Add new JSON functions to allow for the construction of arbitrarily complex JSON trees (Andrew Dunstan, Laurence Rowe)

  New functions include json_array_elements_text(), json_build_array(), json_object(), json_object_agg(), json_to_record(), and json_to_recordset().

  Original release occurrence · 9.4.0/changes/087

• Add json_typeof() to return the data type of a json value Features

  Add json_typeof() to return the data type of a json value (Andrew Tipton)

  Original release occurrence · 9.4.0/changes/088

• Add pg_sleep_for(interval) and pg_sleep_until(timestamp) to specify delays more flexibly Features

  Add pg_sleep_for(interval) and pg_sleep_until(timestamp) to specify delays more flexibly (Vik Fearing, Julien Rouhaud)

  The existing pg_sleep() function only supports delays specified in seconds.

  Original release occurrence · 9.4.0/changes/089

• Add cardinality() function for arrays Features

  Add cardinality() function for arrays (Marko Tiikkaja)

  This returns the total number of elements in the array, or zero for an array with no elements.

  Original release occurrence · 9.4.0/changes/090

• Add SQL functions to allow large object reads/writes at arbitrary offsets Features

  Add SQL functions to allow large object reads/writes at arbitrary offsets (Pavel Stehule)

  Original release occurrence · 9.4.0/changes/091

• Allow unnest() to take multiple arguments, which are individually unnested then horizontally concatenated Features

  Allow unnest() to take multiple arguments, which are individually unnested then horizontally concatenated (Andrew Gierth)

  Original release occurrence · 9.4.0/changes/092

• Add functions to construct times, dates, timestamps, timestamptzs, and intervals from individual values, rather than strings Features

  Add functions to construct times, dates, timestamps, timestamptzs, and intervals from individual values, rather than strings (Pavel Stehule)

  These functions' names are prefixed with make_, e.g. make_date().

  Original release occurrence · 9.4.0/changes/093

• Make to_char()'s TZ format specifier return a useful value for simple numeric time zone offsets Features

  Make to_char()'s TZ format specifier return a useful value for simple numeric time zone offsets (Tom Lane)

  Previously, to_char(CURRENT_TIMESTAMP, 'TZ') returned an empty string if the timezone was set to a constant like -4.

  Original release occurrence · 9.4.0/changes/094

• Add timezone offset format specifier OF to to_char() Features

  Add timezone offset format specifier OF to to_char() (Bruce Momjian)

  Original release occurrence · 9.4.0/changes/095

• Improve the random seed used for random() Features

  Improve the random seed used for random() (Honza Horak)

  Original release occurrence · 9.4.0/changes/096

• Tighten validity checking for Unicode code points in chr(int) Features

  Tighten validity checking for Unicode code points in chr(int) (Tom Lane)

  This function now only accepts values that are valid UTF8 characters according to RFC 3629.

  Original release occurrence · 9.4.0/changes/097

• Add functions for looking up objects in pg_class, pg_proc, pg_type, and pg_operator that do not generate errors for non-existent objects Features

  Add functions for looking up objects in pg_class, pg_proc, pg_type, and pg_operator that do not generate errors for non-existent objects (Yugo Nagata, Nozomi Anzai, Robert Haas)

  For example, to_regclass() does a lookup in pg_class similarly to the regclass input function, but it returns NULL for a non-existent object instead of failing.

  Original release occurrence · 9.4.0/changes/098

• Add function pg_filenode_relation() to allow for more efficient lookup of relation names from filenodes Features

  Add function pg_filenode_relation() to allow for more efficient lookup of relation names from filenodes (Andres Freund)

  Original release occurrence · 9.4.0/changes/099

• Add parameter_default column to information_schema.parameters view Features

  Add parameter_default column to information_schema.parameters view (Peter Eisentraut)

  Original release occurrence · 9.4.0/changes/100

• Make information_schema.schemata show all accessible schemas Features

  Make information_schema.schemata show all accessible schemas (Peter Eisentraut)

  Previously it only showed schemas owned by the current user.

  Original release occurrence · 9.4.0/changes/101

• Add control over which rows are passed into aggregate functions via the FILTER clause Features

  Add control over which rows are passed into aggregate functions via the FILTER clause (David Fetter)

  Original release occurrence · 9.4.0/changes/102

• Support ordered-set (WITHIN GROUP) aggregates Features

  Support ordered-set (WITHIN GROUP) aggregates (Atri Sharma, Andrew Gierth, Tom Lane)

  Original release occurrence · 9.4.0/changes/103

• Add standard ordered-set aggregates percentile_cont(), percentile_disc(), mode(), rank(), dense_rank(), percent_rank(), and cume_dist() Features

  Add standard ordered-set aggregates percentile_cont(), percentile_disc(), mode(), rank(), dense_rank(), percent_rank(), and cume_dist() (Atri Sharma, Andrew Gierth)

  Original release occurrence · 9.4.0/changes/104

• Support VARIADIC aggregate functions Features

  Support VARIADIC aggregate functions (Tom Lane)

  Original release occurrence · 9.4.0/changes/105

• Allow polymorphic aggregates to have non-polymorphic state data types Features

  Allow polymorphic aggregates to have non-polymorphic state data types (Tom Lane)

  This allows proper declaration in SQL of aggregates like the built-in aggregate array_agg().

  Original release occurrence · 9.4.0/changes/106

• Add event trigger support to PL/Perl and PL/Tcl Features

  Add event trigger support to PL/Perl and PL/Tcl (Dimitri Fontaine)

  Original release occurrence · 9.4.0/changes/107

• Convert numeric values to decimal in PL/Python Features

  Convert numeric values to decimal in PL/Python (Szymon Guz, Ronan Dunklau)

  Previously such values were converted to Python float values, risking loss of precision.

  Original release occurrence · 9.4.0/changes/108

• Add ability to retrieve the current PL/pgSQL call stack using GET DIAGNOSTICS Features

  Add ability to retrieve the current PL/pgSQL call stack using GET DIAGNOSTICS (Pavel Stehule, Stephen Frost)

  Original release occurrence · 9.4.0/changes/109

• Add option print_strict_params to display the parameters passed to a query that violated a STRICT constraint Features

  Add option print_strict_params to display the parameters passed to a query that violated a STRICT constraint (Marko Tiikkaja)

  Original release occurrence · 9.4.0/changes/110

• Add variables plpgsql.extra_warnings and plpgsql.extra_errors to enable additional PL/pgSQL warnings and errors Features

  Add variables plpgsql.extra_warnings and plpgsql.extra_errors to enable additional PL/pgSQL warnings and errors (Marko Tiikkaja, Petr Jelinek)

  Currently only warnings/errors about shadowed variables are available.

  Original release occurrence · 9.4.0/changes/111

• Make libpq's PQconndefaults() function ignore invalid service files Features

  Make libpq's PQconndefaults() function ignore invalid service files (Steve Singer, Bruce Momjian)

  Previously it returned NULL if an incorrect service file was encountered.

  Original release occurrence · 9.4.0/changes/112

• Accept TLS protocol versions beyond TLSv1 in libpq Features

  Accept TLS protocol versions beyond TLSv1 in libpq (Marko Kreen)

  Original release occurrence · 9.4.0/changes/113

• Add createuser option -g to specify role membership Features

  Add createuser option -g to specify role membership (Christopher Browne)

  Original release occurrence · 9.4.0/changes/114

• Add vacuumdb option --analyze-in-stages to analyze in stages of increasing granularity Features

  Add vacuumdb option --analyze-in-stages to analyze in stages of increasing granularity (Peter Eisentraut)

  This allows minimal statistics to be created quickly.

  Original release occurrence · 9.4.0/changes/115

• Make pg_resetxlog with option -n output current and potentially changed values Features

  Make pg_resetxlog with option -n output current and potentially changed values (Rajeev Rastogi)

  Original release occurrence · 9.4.0/changes/116

• Make initdb throw error for incorrect locale settings, rather than silently falling back to a default choice Features

  Make initdb throw error for incorrect locale settings, rather than silently falling back to a default choice (Tom Lane)

  Original release occurrence · 9.4.0/changes/117

• Make pg_ctl return exit code 4 for an inaccessible data directory Features

  Make pg_ctl return exit code 4 for an inaccessible data directory (Amit Kapila, Bruce Momjian)

  This behavior more closely matches the Linux Standard Base (LSB) Core Specification.

  Original release occurrence · 9.4.0/changes/118

• On Windows, ensure that a non-absolute -D path specification is interpreted relative to pg_ctl's current directory Features

  On Windows, ensure that a non-absolute -D path specification is interpreted relative to pg_ctl's current directory (Kumar Rajeev Rastogi)

  Previously it would be interpreted relative to whichever directory the underlying Windows service was started in.

  Original release occurrence · 9.4.0/changes/119

• Allow sizeof() in ECPG C array definitions Features

  Allow sizeof() in ECPG C array definitions (Michael Meskes)

  Original release occurrence · 9.4.0/changes/120

• Make ECPG properly handle nesting of C-style comments in both C and SQL text Features

  Make ECPG properly handle nesting of C-style comments in both C and SQL text (Michael Meskes)

  Original release occurrence · 9.4.0/changes/121

• Suppress "No rows" output in psql expanded mode when the footer is disabled Features

  Suppress "No rows" output in psql expanded mode when the footer is disabled (Bruce Momjian)

  Original release occurrence · 9.4.0/changes/122

• Allow Control-C to abort psql when it's hung at connection startup Features

  Allow Control-C to abort psql when it's hung at connection startup (Peter Eisentraut)

  Original release occurrence · 9.4.0/changes/123

• Make psql's \db+ show tablespace options Features

  Make psql's \db+ show tablespace options (Magnus Hagander)

  Original release occurrence · 9.4.0/changes/124

• Make \do+ display the functions that implement the operators Features

  Make \do+ display the functions that implement the operators (Marko Tiikkaja)

  Original release occurrence · 9.4.0/changes/125

• Make \d+ output an OID line only if an oid column exists in the table Features

  Make \d+ output an OID line only if an oid column exists in the table (Bruce Momjian)

  Previously, the presence or absence of an oid column was always reported.

  Original release occurrence · 9.4.0/changes/126

• Make \d show disabled system triggers Features

  Make \d show disabled system triggers (Bruce Momjian)

  Previously, if you disabled all triggers, only user triggers would show as disabled.

  Original release occurrence · 9.4.0/changes/127

• Fix \copy to no longer require a space between stdin and a semicolon Bug fixes

  Fix \copy to no longer require a space between stdin and a semicolon (Etsuro Fujita)

  Original release occurrence · 9.4.0/changes/128

• Output the row count at the end of \copy, just like COPY already did Features

  Output the row count at the end of \copy, just like COPY already did (Kumar Rajeev Rastogi)

  Original release occurrence · 9.4.0/changes/129

• Fix \conninfo to display the server's IP address for connections using hostaddr Bug fixes

  Fix \conninfo to display the server's IP address for connections using hostaddr (Fujii Masao)

  Previously \conninfo could not display the server's IP address in such cases.

  Original release occurrence · 9.4.0/changes/130

• Show the SSL protocol version in \conninfo Features

  Show the SSL protocol version in \conninfo (Marko Kreen)

  Original release occurrence · 9.4.0/changes/131

• Add tab completion for \pset Features

  Add tab completion for \pset (Pavel Stehule)

  Original release occurrence · 9.4.0/changes/132

• Allow \pset with no arguments to show all settings Features

  Allow \pset with no arguments to show all settings (Gilles Darold)

  Original release occurrence · 9.4.0/changes/133

• Make \s display the name of the history file it wrote without converting it to an absolute path Features

  Make \s display the name of the history file it wrote without converting it to an absolute path (Tom Lane)

  The code previously attempted to convert a relative file name to an absolute path for display, but frequently got it wrong.

  Original release occurrence · 9.4.0/changes/134

• Allow pg_restore options -I, -P, -T and -n to be specified multiple times Features

  Allow pg_restore options -I, -P, -T and -n to be specified multiple times (Heikki Linnakangas)

  This allows multiple objects to be restored in one operation.

  Original release occurrence · 9.4.0/changes/135

• Optionally add IF EXISTS clauses to the DROP commands emitted when removing old objects during a restore Features

  Optionally add IF EXISTS clauses to the DROP commands emitted when removing old objects during a restore (Pavel Stehule)

  This change prevents unnecessary errors when removing old objects. The new --if-exists option for pg_dump, pg_dumpall, and pg_restore is only available when --clean is also specified.

  Original release occurrence · 9.4.0/changes/136

• Add pg_basebackup option --xlogdir to specify the pg_xlog directory location Features

  Add pg_basebackup option --xlogdir to specify the pg_xlog directory location (Haribabu Kommi)

  Original release occurrence · 9.4.0/changes/137

• Allow pg_basebackup to relocate tablespaces in the backup copy Features

  Allow pg_basebackup to relocate tablespaces in the backup copy (Steeve Lennmark)

  This is particularly useful for using pg_basebackup on the same machine as the primary.

  Original release occurrence · 9.4.0/changes/138

• Allow network-stream base backups to be throttled Features

  Allow network-stream base backups to be throttled (Antonin Houska)

  This can be controlled with the pg_basebackup --max-rate parameter.

  Original release occurrence · 9.4.0/changes/139

• Improve the way tuples are frozen to preserve forensic information Features

  Improve the way tuples are frozen to preserve forensic information (Robert Haas, Andres Freund)

  This change removes the main objection to freezing tuples as soon as possible. Code that inspects tuple flag bits will need to be modified.

  Original release occurrence · 9.4.0/changes/140

• No longer require function prototypes for functions marked with the PG_FUNCTION_INFO_V1 macro Features

  No longer require function prototypes for functions marked with the PG_FUNCTION_INFO_V1 macro (Peter Eisentraut)

  This change eliminates the need to write boilerplate prototypes. Note that the PG_FUNCTION_INFO_V1 macro must appear before the corresponding function definition to avoid compiler warnings.

  Original release occurrence · 9.4.0/changes/141

• Remove SnapshotNow and HeapTupleSatisfiesNow() Features

  Remove SnapshotNow and HeapTupleSatisfiesNow() (Robert Haas)

  All existing uses have been switched to more appropriate snapshot types. Catalog scans now use MVCC snapshots.

  Original release occurrence · 9.4.0/changes/142

• Add an API to allow memory allocations over one gigabyte Features

  Add an API to allow memory allocations over one gigabyte (Noah Misch)

  Original release occurrence · 9.4.0/changes/143

• Add psprintf() to simplify memory allocation during string composition Features

  Add psprintf() to simplify memory allocation during string composition (Peter Eisentraut, Tom Lane)

  Original release occurrence · 9.4.0/changes/144

• Support printf() size modifier z to print size_t values Features

  Support printf() size modifier z to print size_t values (Andres Freund)

  Original release occurrence · 9.4.0/changes/145

• Change API of appendStringInfoVA() to better use vsnprintf() Features

  Change API of appendStringInfoVA() to better use vsnprintf() (David Rowley, Tom Lane)

  Original release occurrence · 9.4.0/changes/146

• Allow new types of external toast datums to be created Features

  Allow new types of external toast datums to be created (Andres Freund)

  Original release occurrence · 9.4.0/changes/147

• Add single-reader, single-writer, lightweight shared message queue Features

  Add single-reader, single-writer, lightweight shared message queue (Robert Haas)

  Original release occurrence · 9.4.0/changes/148

• Improve spinlock speed on x86_64 CPUs Features

  Improve spinlock speed on x86_64 CPUs (Heikki Linnakangas)

  Original release occurrence · 9.4.0/changes/149

• Remove spinlock support for unsupported platforms SINIX, Sun3, and NS32K Features

  Remove spinlock support for unsupported platforms SINIX, Sun3, and NS32K (Robert Haas)

  Original release occurrence · 9.4.0/changes/150

• Remove IRIX port Features

  Remove IRIX port (Robert Haas)

  Original release occurrence · 9.4.0/changes/151

• Reduce the number of semaphores required by --disable-spinlocks builds Features

  Reduce the number of semaphores required by --disable-spinlocks builds (Robert Haas)

  Original release occurrence · 9.4.0/changes/152

• Rewrite duplicate_oids Unix shell script in Perl Features

  Rewrite duplicate_oids Unix shell script in Perl (Andrew Dunstan)

  Original release occurrence · 9.4.0/changes/153

• Add Test Anything Protocol (TAP) tests for client programs Features

  Add Test Anything Protocol (TAP) tests for client programs (Peter Eisentraut)

  Currently, these tests are run by make check-world only if the --enable-tap-tests option was given to configure. This might become the default behavior in some future release.

  Original release occurrence · 9.4.0/changes/154

• Add make targets check-tests and installcheck-tests, which allow selection of individual tests to be run Features

  Add make targets check-tests and installcheck-tests, which allow selection of individual tests to be run (Andrew Dunstan)

  Original release occurrence · 9.4.0/changes/155

• Remove maintainer-check makefile rule Features

  Remove maintainer-check makefile rule (Peter Eisentraut)

  The default build rules now include all the formerly-optional tests.

  Original release occurrence · 9.4.0/changes/156

• Improve support for VPATH builds of PGXS modules Features

  Improve support for VPATH builds of PGXS modules (Cédric Villemain, Andrew Dunstan, Peter Eisentraut)

  Original release occurrence · 9.4.0/changes/157

• Upgrade to Autoconf 2.69 Features

  Upgrade to Autoconf 2.69 (Peter Eisentraut)

  Original release occurrence · 9.4.0/changes/158

• Add a configure flag that appends custom text to the PG_VERSION string Features

  Add a configure flag that appends custom text to the PG_VERSION string (Oskari Saarenmaa)

  This is useful for packagers building custom binaries.

  Original release occurrence · 9.4.0/changes/159

• Improve DocBook XML validity Features

  Improve DocBook XML validity (Peter Eisentraut)

  Original release occurrence · 9.4.0/changes/160

• Fix various minor security and sanity issues reported by the Coverity scanner Bug fixes

  Fix various minor security and sanity issues reported by the Coverity scanner (Stephen Frost)

  Original release occurrence · 9.4.0/changes/161

• Improve detection of invalid memory usage when testing PostgreSQL with Valgrind Features

  Improve detection of invalid memory usage when testing PostgreSQL with Valgrind (Noah Misch)

  Original release occurrence · 9.4.0/changes/162

• Improve sample Emacs configuration file emacs.samples Features

  Improve sample Emacs configuration file emacs.samples (Peter Eisentraut)

  Also add .dir-locals.el to the top of the source tree.

  Original release occurrence · 9.4.0/changes/163

• Allow pgindent to accept a command-line list of typedefs Features

  Allow pgindent to accept a command-line list of typedefs (Bruce Momjian)

  Original release occurrence · 9.4.0/changes/164

• Make pgindent smarter about blank lines around preprocessor conditionals Features

  Make pgindent smarter about blank lines around preprocessor conditionals (Bruce Momjian)

  Original release occurrence · 9.4.0/changes/165

• Avoid most uses of dlltool in Cygwin and Mingw builds Features

  Avoid most uses of dlltool in Cygwin and Mingw builds (Marco Atzeri, Hiroshi Inoue)

  Original release occurrence · 9.4.0/changes/166

• Support client-only installs in MSVC (Windows) builds Features

  Support client-only installs in MSVC (Windows) builds (MauMau)

  Original release occurrence · 9.4.0/changes/167

• Add pg_prewarm extension to preload relation data into the shared buffer cache at server start Features

  Add pg_prewarm extension to preload relation data into the shared buffer cache at server start (Robert Haas)

  This allows reaching full operating performance more quickly.

  Original release occurrence · 9.4.0/changes/168

• Add UUID random number generator gen_random_uuid() to pgcrypto Features

  Add UUID random number generator gen_random_uuid() to pgcrypto (Oskari Saarenmaa)

  This allows creation of version 4 UUIDs without requiring installation of uuid-ossp.

  Original release occurrence · 9.4.0/changes/169

• Allow uuid-ossp to work with the BSD or e2fsprogs UUID libraries, not only the OSSP UUID library Features

  Allow uuid-ossp to work with the BSD or e2fsprogs UUID libraries, not only the OSSP UUID library (Matteo Beccati)

  This improves the uuid-ossp module's portability since it no longer has to have the increasingly-obsolete OSSP library. The module's name is now rather a misnomer, but we won't change it.

  Original release occurrence · 9.4.0/changes/170

• Add option to auto_explain to include trigger execution time Features

  Add option to auto_explain to include trigger execution time (Horiguchi Kyotaro)

  Original release occurrence · 9.4.0/changes/171

• Fix pgstattuple to not report rows from uncommitted transactions as dead Bug fixes

  Fix pgstattuple to not report rows from uncommitted transactions as dead (Robert Haas)

  Original release occurrence · 9.4.0/changes/172

• Make pgstattuple functions use regclass-type arguments Features

  Make pgstattuple functions use regclass-type arguments (Satoshi Nagayasu)

  While text-type arguments are still supported, they may be removed in a future major release.

  Original release occurrence · 9.4.0/changes/173

• Improve consistency of pgrowlocks output to honor snapshot rules more consistently Features

  Improve consistency of pgrowlocks output to honor snapshot rules more consistently (Robert Haas)

  Original release occurrence · 9.4.0/changes/174

• Improve pg_trgm's choice of trigrams for indexed regular expression searches Features

  Improve pg_trgm's choice of trigrams for indexed regular expression searches (Alexander Korotkov)

  This change discourages use of trigrams containing whitespace, which are usually less selective.

  Original release occurrence · 9.4.0/changes/175

• Allow pg_xlogdump to report a live log stream with --follow Features

  Allow pg_xlogdump to report a live log stream with --follow (Heikki Linnakangas)

  Original release occurrence · 9.4.0/changes/176

• Store cube data more compactly Features

  Store cube data more compactly (Stas Kelvich)

  Existing data must be dumped/restored to use the new format. The old format can still be read.

  Original release occurrence · 9.4.0/changes/177

• Reduce vacuumlo client-side memory usage by using a cursor Features

  Reduce vacuumlo client-side memory usage by using a cursor (Andrew Dunstan)

  Original release occurrence · 9.4.0/changes/178

• Dramatically reduce memory consumption in pg_upgrade Features

  Dramatically reduce memory consumption in pg_upgrade (Bruce Momjian)

  Original release occurrence · 9.4.0/changes/179

• Pass pg_upgrade's user name (-U) option to generated analyze scripts Features

  Pass pg_upgrade's user name (-U) option to generated analyze scripts (Bruce Momjian)

  Original release occurrence · 9.4.0/changes/180

• Remove line length limit for pgbench scripts Features

  Remove line length limit for pgbench scripts (Sawada Masahiko)

  The previous line limit was BUFSIZ.

  Original release occurrence · 9.4.0/changes/181

• Add long option names to pgbench Features

  Add long option names to pgbench (Fabien Coelho)

  Original release occurrence · 9.4.0/changes/182

• Add pgbench option --rate to control the transaction rate Features

  Add pgbench option --rate to control the transaction rate (Fabien Coelho)

  Original release occurrence · 9.4.0/changes/183

• Add pgbench option --progress to print periodic progress reports Features

  Add pgbench option --progress to print periodic progress reports (Fabien Coelho)

  Original release occurrence · 9.4.0/changes/184

• Make pg_stat_statements use a file, rather than shared memory, for query text storage Features

  Make pg_stat_statements use a file, rather than shared memory, for query text storage (Peter Geoghegan)

  This removes the previous limitation on query text length, and allows a higher number of unique statements to be tracked by default.

  Original release occurrence · 9.4.0/changes/185

• Allow reporting of pg_stat_statements's internal query hash identifier Features

  Allow reporting of pg_stat_statements's internal query hash identifier (Daniel Farina, Sameer Thakur, Peter Geoghegan)

  Original release occurrence · 9.4.0/changes/186

• Add the ability to retrieve all pg_stat_statements information except the query text Features

  Add the ability to retrieve all pg_stat_statements information except the query text (Peter Geoghegan)

  This allows monitoring tools to fetch query text only for just-created entries, improving performance during repeated querying of the statistics.

  Original release occurrence · 9.4.0/changes/187

• Make pg_stat_statements ignore DEALLOCATE commands Features

  Make pg_stat_statements ignore DEALLOCATE commands (Fabien Coelho)

  It already ignored PREPARE, as well as planning time in general, so this seems more consistent.

  Original release occurrence · 9.4.0/changes/188

• Save the statistics file into $PGDATA/pg_stat at server shutdown, rather than $PGDATA/global Features

  Save the statistics file into $PGDATA/pg_stat at server shutdown, rather than $PGDATA/global (Fujii Masao)

  Original release occurrence · 9.4.0/changes/189

Security evidence

36 records from the official security matrix and release-note mentions. A fixed version is shown only when the security snapshot explicitly names this branch. A mention alone does not establish applicability or a new fix.