PostgreSQL 9.1

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 9.1.0, including feature changes and compatibility notes. Categories aid browsing; they are not upstream classifications.

203 of 203 original entries.

• Change the default value of standard_conforming_strings to on Compatibility Migration

  Change the default value of standard_conforming_strings to on (Robert Haas)

  By default, backslashes are now ordinary characters in string literals, not escape characters. This change removes a long-standing incompatibility with the SQL standard. escape_string_warning has produced warnings about this usage for years. E'' strings are the proper way to embed backslash escapes in strings and are unaffected by this change.

  Warning

  This change can break applications that are not expecting it and do their own string escaping according to the old rules. The consequences could be as severe as introducing SQL-injection security holes. Be sure to test applications that are exposed to untrusted input, to ensure that they correctly handle single quotes and backslashes in text strings.

  Original release occurrence · 9.1.0/migration/001

• Disallow function-style and attribute-style data type casts for composite types Compatibility Migration

  Disallow function-style and attribute-style data type casts for composite types (Tom Lane)

  For example, disallow composite_value.text and text(composite_value). Unintentional uses of this syntax have frequently resulted in bug reports; although it was not a bug, it seems better to go back to rejecting such expressions. The CAST and :: syntaxes are still available for use when a cast of an entire composite value is actually intended.

  Original release occurrence · 9.1.0/migration/002

• Tighten casting checks for domains based on arrays Compatibility Migration

  Tighten casting checks for domains based on arrays (Tom Lane)

  When a domain is based on an array type, it is allowed to "look through" the domain type to access the array elements, including subscripting the domain value to fetch or assign an element. Assignment to an element of such a domain value, for instance via UPDATE ... SET domaincol[5] = ..., will now result in rechecking the domain type's constraints, whereas before the checks were skipped.

  Original release occurrence · 9.1.0/migration/003

• Change string_to_array() to return an empty array for a zero-length string Compatibility Migration

  Change string_to_array() to return an empty array for a zero-length string (Pavel Stehule)

  Previously this returned a null value.

  Original release occurrence · 9.1.0/migration/004

• Change string_to_array() so a NULL separator splits the string into characters Compatibility Migration

  Change string_to_array() so a NULL separator splits the string into characters (Pavel Stehule)

  Previously this returned a null value.

  Original release occurrence · 9.1.0/migration/005

• Fix improper checks for before/after triggers Compatibility Migration

  Fix improper checks for before/after triggers (Tom Lane)

  Triggers can now be fired in three cases: BEFORE, AFTER, or INSTEAD OF some action. Trigger function authors should verify that their logic behaves sanely in all three cases.

  Original release occurrence · 9.1.0/migration/006

• Require superuser or CREATEROLE permissions in order to set comments on roles Compatibility Migration

  Require superuser or CREATEROLE permissions in order to set comments on roles (Tom Lane)

  Original release occurrence · 9.1.0/migration/007

• Change pg_last_xlog_receive_location() so it never moves backwards Compatibility Migration

  Change pg_last_xlog_receive_location() so it never moves backwards (Fujii Masao)

  Previously, the value of pg_last_xlog_receive_location() could move backward when streaming replication is restarted.

  Original release occurrence · 9.1.0/migration/008

• Have logging of replication connections honor log_connections Compatibility Migration

  Have logging of replication connections honor log_connections (Magnus Hagander)

  Previously, replication connections were always logged.

  Original release occurrence · 9.1.0/migration/009

• Change PL/pgSQL's RAISE command without parameters to be catchable by the attached exception block Compatibility Migration

  Change PL/pgSQL's RAISE command without parameters to be catchable by the attached exception block (Piyush Newe)

  Previously RAISE in a code block was always scoped to an attached exception block, so it was uncatchable at the same scope.

  Original release occurrence · 9.1.0/migration/010

• Adjust PL/pgSQL's error line numbering code to be consistent with other PLs Compatibility Migration

  Adjust PL/pgSQL's error line numbering code to be consistent with other PLs (Pavel Stehule)

  Previously, PL/pgSQL would ignore (not count) an empty line at the start of the function body. Since this was inconsistent with all other languages, the special case was removed.

  Original release occurrence · 9.1.0/migration/011

• Make PL/pgSQL complain about conflicting IN and OUT parameter names Compatibility Migration

  Make PL/pgSQL complain about conflicting IN and OUT parameter names (Tom Lane)

  Formerly, the collision was not detected, and the name would just silently refer to only the OUT parameter.

  Original release occurrence · 9.1.0/migration/012

• Type modifiers of PL/pgSQL variables are now visible to the SQL parser Compatibility Migration

  Type modifiers of PL/pgSQL variables are now visible to the SQL parser (Tom Lane)

  A type modifier (such as a varchar length limit) attached to a PL/pgSQL variable was formerly enforced during assignments, but was ignored for all other purposes. Such variables will now behave more like table columns declared with the same modifier. This is not expected to make any visible difference in most cases, but it could result in subtle changes for some SQL commands issued by PL/pgSQL functions.

  Original release occurrence · 9.1.0/migration/013

• All contrib modules are now installed with CREATE EXTENSION rather than by manually invoking their SQL scripts Compatibility Migration

  All contrib modules are now installed with CREATE EXTENSION rather than by manually invoking their SQL scripts (Dimitri Fontaine, Tom Lane)

  To update an existing database containing the 9.0 version of a contrib module, use CREATE EXTENSION ... FROM unpackaged to wrap the existing contrib module's objects into an extension. When updating from a pre-9.0 version, drop the contrib module's objects using its old uninstall script, then use CREATE EXTENSION.

  Original release occurrence · 9.1.0/migration/014

• Make pg_stat_reset() reset all database-level statistics Compatibility Migration

  Make pg_stat_reset() reset all database-level statistics (Tomas Vondra)

  Some pg_stat_database counters were not being reset.

  Original release occurrence · 9.1.0/migration/015

• Fix some information_schema.triggers column names to match the new SQL-standard names Compatibility Migration

  Fix some information_schema.triggers column names to match the new SQL-standard names (Dean Rasheed)

  Original release occurrence · 9.1.0/migration/016

• Treat ECPG cursor names as case-insensitive Compatibility Migration

  Treat ECPG cursor names as case-insensitive (Zoltan Boszormenyi)

  Original release occurrence · 9.1.0/migration/017

• Support unlogged tables using the UNLOGGED option in CREATE TABLE Features

  Support unlogged tables using the UNLOGGED option in CREATE TABLE (Robert Haas)

  Such tables provide better update performance than regular tables, but are not crash-safe: their contents are automatically cleared in case of a server crash. Their contents do not propagate to replication slaves, either.

  Original release occurrence · 9.1.0/changes/001

• Allow FULL OUTER JOIN to be implemented as a hash join, and allow either side of a LEFT OUTER JOIN or RIGHT OUTER JOIN to be hashed Features

  Allow FULL OUTER JOIN to be implemented as a hash join, and allow either side of a LEFT OUTER JOIN or RIGHT OUTER JOIN to be hashed (Tom Lane)

  Previously FULL OUTER JOIN could only be implemented as a merge join, and LEFT OUTER JOIN and RIGHT OUTER JOIN could hash only the nullable side of the join. These changes provide additional query optimization possibilities.

  Original release occurrence · 9.1.0/changes/002

• Merge duplicate fsync requests Features

  Merge duplicate fsync requests (Robert Haas, Greg Smith)

  This greatly improves performance under heavy write loads.

  Original release occurrence · 9.1.0/changes/003

• Improve performance of commit_siblings Performance

  Improve performance of commit_siblings (Greg Smith)

  This allows the use of commit_siblings with less overhead.

  Original release occurrence · 9.1.0/changes/004

• Reduce the memory requirement for large ispell dictionaries Features

  Reduce the memory requirement for large ispell dictionaries (Pavel Stehule, Tom Lane)

  Original release occurrence · 9.1.0/changes/005

• Avoid leaving data files open after "blind writes" Features

  Avoid leaving data files open after "blind writes" (Alvaro Herrera)

  This fixes scenarios in which backends might hold files open long after they were deleted, preventing the kernel from reclaiming disk space.

  Original release occurrence · 9.1.0/changes/006

• Allow inheritance table scans to return meaningfully-sorted results Features

  Allow inheritance table scans to return meaningfully-sorted results (Greg Stark, Hans-Jurgen Schonig, Robert Haas, Tom Lane)

  This allows better optimization of queries that use ORDER BY, LIMIT, or MIN/MAX with inherited tables.

  Original release occurrence · 9.1.0/changes/007

• Improve GIN index scan cost estimation Features

  Improve GIN index scan cost estimation (Teodor Sigaev)

  Original release occurrence · 9.1.0/changes/008

• Improve cost estimation for aggregates and window functions Features

  Improve cost estimation for aggregates and window functions (Tom Lane)

  Original release occurrence · 9.1.0/changes/009

• Support host names and host suffixes (e.g. .example.com) in pg_hba.conf Features

  Support host names and host suffixes (e.g. .example.com) in pg_hba.conf (Peter Eisentraut)

  Previously only host IP addresses and CIDR values were supported.

  Original release occurrence · 9.1.0/changes/010

• Support the key word all in the host column of pg_hba.conf Features

  Support the key word all in the host column of pg_hba.conf (Peter Eisentraut)

  Previously people used 0.0.0.0/0 or ::/0 for this.

  Original release occurrence · 9.1.0/changes/011

• Reject local lines in pg_hba.conf on platforms that don't support Unix-socket connections Features

  Reject local lines in pg_hba.conf on platforms that don't support Unix-socket connections (Magnus Hagander)

  Formerly, such lines were silently ignored, which could be surprising. This makes the behavior more like other unsupported cases.

  Original release occurrence · 9.1.0/changes/012

• Allow GSSAPI to be used to authenticate to servers via SSPI Features

  Allow GSSAPI to be used to authenticate to servers via SSPI (Christian Ullrich)

  Specifically this allows Unix-based GSSAPI clients to do SSPI authentication with Windows servers.

  Original release occurrence · 9.1.0/changes/013

• ident authentication over local sockets is now known as peer Features

  ident authentication over local sockets is now known as peer (Magnus Hagander)

  The old term is still accepted for backward compatibility, but since the two methods are fundamentally different, it seemed better to adopt different names for them.

  Original release occurrence · 9.1.0/changes/014

• Rewrite peer authentication to avoid use of credential control messages Features

  Rewrite peer authentication to avoid use of credential control messages (Tom Lane)

  This change makes the peer authentication code simpler and better-performing. However, it requires the platform to provide the getpeereid function or an equivalent socket operation. So far as is known, the only platform for which peer authentication worked before and now will not is pre-5.0 NetBSD.

  Original release occurrence · 9.1.0/changes/015

• Add details to the logging of restartpoints and checkpoints, which is controlled by log_checkpoints Features

  Add details to the logging of restartpoints and checkpoints, which is controlled by log_checkpoints (Fujii Masao, Greg Smith)

  New details include WAL file and sync activity.

  Original release occurrence · 9.1.0/changes/016

• Add log_file_mode which controls the permissions on log files created by the logging collector Features

  Add log_file_mode which controls the permissions on log files created by the logging collector (Martin Pihlak)

  Original release occurrence · 9.1.0/changes/017

• Reduce the default maximum line length for syslog logging to 900 bytes plus prefixes Features

  Reduce the default maximum line length for syslog logging to 900 bytes plus prefixes (Noah Misch)

  This avoids truncation of long log lines on syslog implementations that have a 1KB length limit, rather than the more common 2KB.

  Original release occurrence · 9.1.0/changes/018

• Add client_hostname column to pg_stat_activity Features

  Add client_hostname column to pg_stat_activity (Peter Eisentraut)

  Previously only the client address was reported.

  Original release occurrence · 9.1.0/changes/019

• Add pg_stat_xact_* statistics functions and views Features

  Add pg_stat_xact_* statistics functions and views (Joel Jacobson)

  These are like the database-wide statistics counter views, but reflect counts for only the current transaction.

  Original release occurrence · 9.1.0/changes/020

• Add time of last reset in database-level and background writer statistics views Features

  Add time of last reset in database-level and background writer statistics views (Tomas Vondra)

  Original release occurrence · 9.1.0/changes/021

• Add columns showing the number of vacuum and analyze operations in pg_stat_*_tables views Features

  Add columns showing the number of vacuum and analyze operations in pg_stat_*_tables views (Magnus Hagander)

  Original release occurrence · 9.1.0/changes/022

• Add buffers_backend_fsync column to pg_stat_bgwriter Features

  Add buffers_backend_fsync column to pg_stat_bgwriter (Greg Smith)

  This new column counts the number of times a backend fsyncs a buffer.

  Original release occurrence · 9.1.0/changes/023

• Provide auto-tuning of wal_buffers Features

  Provide auto-tuning of wal_buffers (Greg Smith)

  By default, the value of wal_buffers is now chosen automatically based on the value of shared_buffers.

  Original release occurrence · 9.1.0/changes/024

• Increase the maximum values for deadlock_timeout, log_min_duration_statement, and log_autovacuum_min_duration Features

  Increase the maximum values for deadlock_timeout, log_min_duration_statement, and log_autovacuum_min_duration (Peter Eisentraut)

  The maximum value for each of these parameters was previously only about 35 minutes. Much larger values are now allowed.

  Original release occurrence · 9.1.0/changes/025

• Allow synchronous replication Features

  Allow synchronous replication (Simon Riggs, Fujii Masao)

  This allows the primary server to wait for a standby to write a transaction's information to disk before acknowledging the commit. One standby at a time can take the role of the synchronous standby, as controlled by the synchronous_standby_names setting. Synchronous replication can be enabled or disabled on a per-transaction basis using the synchronous_commit setting.

  Original release occurrence · 9.1.0/changes/026

• Add protocol support for sending file system backups to standby servers using the streaming replication network connection Features

  Add protocol support for sending file system backups to standby servers using the streaming replication network connection (Magnus Hagander, Heikki Linnakangas)

  This avoids the requirement of manually transferring a file system backup when setting up a standby server.

  Original release occurrence · 9.1.0/changes/027

• Add replication_timeout setting Features

  Add replication_timeout setting (Fujii Masao, Heikki Linnakangas)

  Replication connections that are idle for more than the replication_timeout interval will be terminated automatically. Formerly, a failed connection was typically not detected until the TCP timeout elapsed, which is inconveniently long in many situations.

  Original release occurrence · 9.1.0/changes/028

• Add command-line tool pg_basebackup for creating a new standby server or database backup Features

  Add command-line tool pg_basebackup for creating a new standby server or database backup (Magnus Hagander)

  Original release occurrence · 9.1.0/changes/029

• Add a replication permission for roles Features

  Add a replication permission for roles (Magnus Hagander)

  This is a read-only permission used for streaming replication. It allows a non-superuser role to be used for replication connections. Previously only superusers could initiate replication connections; superusers still have this permission by default.

  Original release occurrence · 9.1.0/changes/030

• Add system view pg_stat_replication which displays activity of WAL sender processes Features

  Add system view pg_stat_replication which displays activity of WAL sender processes (Itagaki Takahiro, Simon Riggs)

  This reports the status of all connected standby servers.

  Original release occurrence · 9.1.0/changes/031

• Add monitoring function pg_last_xact_replay_timestamp() Features

  Add monitoring function pg_last_xact_replay_timestamp() (Fujii Masao)

  This returns the time at which the primary generated the most recent commit or abort record applied on the standby.

  Original release occurrence · 9.1.0/changes/032

• Add configuration parameter hot_standby_feedback to enable standbys to postpone cleanup of old row versions on the primary Features

  Add configuration parameter hot_standby_feedback to enable standbys to postpone cleanup of old row versions on the primary (Simon Riggs)

  This helps avoid canceling long-running queries on the standby.

  Original release occurrence · 9.1.0/changes/033

• Add the pg_stat_database_conflicts system view to show queries that have been canceled and the reason Features

  Add the pg_stat_database_conflicts system view to show queries that have been canceled and the reason (Magnus Hagander)

  Cancellations can occur because of dropped tablespaces, lock timeouts, old snapshots, pinned buffers, and deadlocks.

  Original release occurrence · 9.1.0/changes/034

• Add a conflicts count to pg_stat_database Features

  Add a conflicts count to pg_stat_database (Magnus Hagander)

  This is the number of conflicts that occurred in the database.

  Original release occurrence · 9.1.0/changes/035

• Increase the maximum values for max_standby_archive_delay and max_standby_streaming_delay Features

  Increase the maximum values for max_standby_archive_delay and max_standby_streaming_delay

  The maximum value for each of these parameters was previously only about 35 minutes. Much larger values are now allowed.

  Original release occurrence · 9.1.0/changes/036

• Add ERRCODE_T_R_DATABASE_DROPPED error code to report recovery conflicts due to dropped databases Features

  Add ERRCODE_T_R_DATABASE_DROPPED error code to report recovery conflicts due to dropped databases (Tatsuo Ishii)

  This is useful for connection pooling software.

  Original release occurrence · 9.1.0/changes/037

• Add functions to control streaming replication replay Features

  Add functions to control streaming replication replay (Simon Riggs)

  The new functions are pg_xlog_replay_pause(), pg_xlog_replay_resume(), and the status function pg_is_xlog_replay_paused().

  Original release occurrence · 9.1.0/changes/038

• Add recovery.conf setting pause_at_recovery_target to pause recovery at target Features

  Add recovery.conf setting pause_at_recovery_target to pause recovery at target (Simon Riggs)

  This allows a recovery server to be queried to check whether the recovery point is the one desired.

  Original release occurrence · 9.1.0/changes/039

• Add the ability to create named restore points using pg_create_restore_point() Features

  Add the ability to create named restore points using pg_create_restore_point() (Jaime Casanova)

  These named restore points can be specified as recovery targets using the new recovery.conf setting recovery_target_name.

  Original release occurrence · 9.1.0/changes/040

• Allow standby recovery to switch to a new timeline automatically Features

  Allow standby recovery to switch to a new timeline automatically (Heikki Linnakangas)

  Now standby servers scan the archive directory for new timelines periodically.

  Original release occurrence · 9.1.0/changes/041

• Add restart_after_crash setting which disables automatic server restart after a backend crash Features

  Add restart_after_crash setting which disables automatic server restart after a backend crash (Robert Haas)

  This allows external cluster management software to control whether the database server restarts or not.

  Original release occurrence · 9.1.0/changes/042

• Allow recovery.conf to use the same quoting behavior as postgresql.conf Features

  Allow recovery.conf to use the same quoting behavior as postgresql.conf (Dimitri Fontaine)

  Previously all values had to be quoted.

  Original release occurrence · 9.1.0/changes/043

• Add a true serializable isolation level Features

  Add a true serializable isolation level (Kevin Grittner, Dan Ports)

  Previously, asking for serializable isolation guaranteed only that a single MVCC snapshot would be used for the entire transaction, which allowed certain documented anomalies. The old snapshot isolation behavior is still available by requesting the REPEATABLE READ isolation level.

  Original release occurrence · 9.1.0/changes/044

• Allow data-modification commands (INSERT/UPDATE/DELETE) in WITH clauses Features

  Allow data-modification commands (INSERT/UPDATE/DELETE) in WITH clauses (Marko Tiikkaja, Hitoshi Harada)

  These commands can use RETURNING to pass data up to the containing query.

  Original release occurrence · 9.1.0/changes/045

• Allow WITH clauses to be attached to INSERT, UPDATE, DELETE statements Features

  Allow WITH clauses to be attached to INSERT, UPDATE, DELETE statements (Marko Tiikkaja, Hitoshi Harada)

  Original release occurrence · 9.1.0/changes/046

• Allow non-GROUP BY columns in the query target list when the primary key is specified in the GROUP BY clause Features

  Allow non-GROUP BY columns in the query target list when the primary key is specified in the GROUP BY clause (Peter Eisentraut)

  The SQL standard allows this behavior, and because of the primary key, the result is unambiguous.

  Original release occurrence · 9.1.0/changes/047

• Allow use of the key word DISTINCT in UNION/INTERSECT/EXCEPT clauses Features

  Allow use of the key word DISTINCT in UNION/INTERSECT/EXCEPT clauses (Tom Lane)

  DISTINCT is the default behavior so use of this key word is redundant, but the SQL standard allows it.

  Original release occurrence · 9.1.0/changes/048

• Fix ordinary queries with rules to use the same snapshot behavior as EXPLAIN ANALYZE Bug fixes

  Fix ordinary queries with rules to use the same snapshot behavior as EXPLAIN ANALYZE (Marko Tiikkaja)

  Previously EXPLAIN ANALYZE used slightly different snapshot timing for queries involving rules. The EXPLAIN ANALYZE behavior was judged to be more logical.

  Original release occurrence · 9.1.0/changes/049

• Add per-column collation support Features

  Add per-column collation support (Peter Eisentraut, Tom Lane)

  Previously collation (the sort ordering of text strings) could only be chosen at database creation. Collation can now be set per column, domain, index, or expression, via the SQL-standard COLLATE clause.

  Original release occurrence · 9.1.0/changes/050

• Add extensions which simplify packaging of additions to PostgreSQL Features

  Add extensions which simplify packaging of additions to PostgreSQL (Dimitri Fontaine, Tom Lane)

  Extensions are controlled by the new CREATE/ALTER/DROP EXTENSION commands. This replaces ad-hoc methods of grouping objects that are added to a PostgreSQL installation.

  Original release occurrence · 9.1.0/changes/051

• Add support for foreign tables Features

  Add support for foreign tables (Shigeru Hanada, Robert Haas, Jan Urbanski, Heikki Linnakangas)

  This allows data stored outside the database to be used like native PostgreSQL-stored data. Foreign tables are currently read-only, however.

  Original release occurrence · 9.1.0/changes/052

• Allow new values to be added to an existing enum type via ALTER TYPE Features

  Allow new values to be added to an existing enum type via ALTER TYPE (Andrew Dunstan)

  Original release occurrence · 9.1.0/changes/053

• Add ALTER TYPE ... ADD/DROP/ALTER/RENAME ATTRIBUTE Features

  Add ALTER TYPE ... ADD/DROP/ALTER/RENAME ATTRIBUTE (Peter Eisentraut)

  This allows modification of composite types.

  Original release occurrence · 9.1.0/changes/054

• Add RESTRICT/CASCADE to ALTER TYPE operations on typed tables Features

  Add RESTRICT/CASCADE to ALTER TYPE operations on typed tables (Peter Eisentraut)

  This controls ADD/DROP/ALTER/RENAME ATTRIBUTE cascading behavior.

  Original release occurrence · 9.1.0/changes/055

• Support ALTER TABLE name {OF | NOT OF} type Features

  Support ALTER TABLE name {OF | NOT OF} type (Noah Misch)

  This syntax allows a standalone table to be made into a typed table, or a typed table to be made standalone.

  Original release occurrence · 9.1.0/changes/056

• Add support for more object types in ALTER ... SET SCHEMA commands Features

  Add support for more object types in ALTER ... SET SCHEMA commands (Dimitri Fontaine)

  This command is now supported for conversions, operators, operator classes, operator families, text search configurations, text search dictionaries, text search parsers, and text search templates.

  Original release occurrence · 9.1.0/changes/057

• Add ALTER TABLE ... ADD UNIQUE/PRIMARY KEY USING INDEX Features

  Add ALTER TABLE ... ADD UNIQUE/PRIMARY KEY USING INDEX (Gurjeet Singh)

  This allows a primary key or unique constraint to be defined using an existing unique index, including a concurrently created unique index.

  Original release occurrence · 9.1.0/changes/058

• Allow ALTER TABLE to add foreign keys without validation Features

  Allow ALTER TABLE to add foreign keys without validation (Simon Riggs)

  The new option is called NOT VALID. The constraint's state can later be modified to VALIDATED and validation checks performed. Together these allow you to add a foreign key with minimal impact on read and write operations.

  Original release occurrence · 9.1.0/changes/059

• Allow ALTER TABLE ... SET DATA TYPE to avoid table rewrites in appropriate cases Features

  Allow ALTER TABLE ... SET DATA TYPE to avoid table rewrites in appropriate cases (Noah Misch, Robert Haas)

  For example, converting a varchar column to text no longer requires a rewrite of the table. However, increasing the length constraint on a varchar column still requires a table rewrite.

  Original release occurrence · 9.1.0/changes/060

• Add CREATE TABLE IF NOT EXISTS syntax Features

  Add CREATE TABLE IF NOT EXISTS syntax (Robert Haas)

  This allows table creation without causing an error if the table already exists.

  Original release occurrence · 9.1.0/changes/061

• Fix possible "tuple concurrently updated" error when two backends attempt to add an inheritance child to the same table at the same time Bug fixes

  Fix possible "tuple concurrently updated" error when two backends attempt to add an inheritance child to the same table at the same time (Robert Haas)

  ALTER TABLE now takes a stronger lock on the parent table, so that the sessions cannot try to update it simultaneously.

  Original release occurrence · 9.1.0/changes/062

• Add a SECURITY LABEL command Features

  Add a SECURITY LABEL command (KaiGai Kohei)

  This allows security labels to be assigned to objects.

  Original release occurrence · 9.1.0/changes/063

• Add transaction-level advisory locks Features

  Add transaction-level advisory locks (Marko Tiikkaja)

  These are similar to the existing session-level advisory locks, but such locks are automatically released at transaction end.

  Original release occurrence · 9.1.0/changes/064

• Make TRUNCATE ... RESTART IDENTITY restart sequences transactionally Features

  Make TRUNCATE ... RESTART IDENTITY restart sequences transactionally (Steve Singer)

  Previously the counter could have been left out of sync if a backend crashed between the on-commit truncation activity and commit completion.

  Original release occurrence · 9.1.0/changes/065

• Add ENCODING option to COPY TO/FROM Features

  Add ENCODING option to COPY TO/FROM (Hitoshi Harada, Itagaki Takahiro)

  This allows the encoding of the COPY file to be specified separately from client encoding.

  Original release occurrence · 9.1.0/changes/066

• Add bidirectional COPY protocol support Features

  Add bidirectional COPY protocol support (Fujii Masao)

  This is currently only used by streaming replication.

  Original release occurrence · 9.1.0/changes/067

• Make EXPLAIN VERBOSE show the function call expression in a FunctionScan node Features

  Make EXPLAIN VERBOSE show the function call expression in a FunctionScan node (Tom Lane)

  Original release occurrence · 9.1.0/changes/068

• Add additional details to the output of VACUUM FULL VERBOSE and CLUSTER VERBOSE Features

  Add additional details to the output of VACUUM FULL VERBOSE and CLUSTER VERBOSE (Itagaki Takahiro)

  New information includes the live and dead tuple count and whether CLUSTER is using an index to rebuild.

  Original release occurrence · 9.1.0/changes/069

• Prevent autovacuum from waiting if it cannot acquire a table lock Features

  Prevent autovacuum from waiting if it cannot acquire a table lock (Robert Haas)

  It will try to vacuum that table later.

  Original release occurrence · 9.1.0/changes/070

• Allow CLUSTER to sort the table rather than scanning the index when it seems likely to be cheaper Features

  Allow CLUSTER to sort the table rather than scanning the index when it seems likely to be cheaper (Leonardo Francalanci)

  Original release occurrence · 9.1.0/changes/071

• Add nearest-neighbor (order-by-operator) searching to GiST indexes Features

  Add nearest-neighbor (order-by-operator) searching to GiST indexes (Teodor Sigaev, Tom Lane)

  This allows GiST indexes to quickly return the N closest values in a query with LIMIT. For example

  SELECT * FROM places ORDER BY location <-> point '(101,456)' LIMIT 10;
  

  finds the ten places closest to a given target point.

  Original release occurrence · 9.1.0/changes/072

• Allow GIN indexes to index null and empty values Features

  Allow GIN indexes to index null and empty values (Tom Lane)

  This allows full GIN index scans, and fixes various corner cases in which GIN scans would fail.

  Original release occurrence · 9.1.0/changes/073

• Allow GIN indexes to better recognize duplicate search entries Features

  Allow GIN indexes to better recognize duplicate search entries (Tom Lane)

  This reduces the cost of index scans, especially in cases where it avoids unnecessary full index scans.

  Original release occurrence · 9.1.0/changes/074

• Fix GiST indexes to be fully crash-safe Bug fixes

  Fix GiST indexes to be fully crash-safe (Heikki Linnakangas)

  Previously there were rare cases where a REINDEX would be required (you would be informed).

  Original release occurrence · 9.1.0/changes/075

• Allow numeric to use a more compact, two-byte header in common cases Features

  Allow numeric to use a more compact, two-byte header in common cases (Robert Haas)

  Previously all numeric values had four-byte headers; this change saves on disk storage.

  Original release occurrence · 9.1.0/changes/076

• Add support for dividing money by money Features

  Add support for dividing money by money (Andy Balholm)

  Original release occurrence · 9.1.0/changes/077

• Allow binary I/O on type void Features

  Allow binary I/O on type void (Radoslaw Smogura)

  Original release occurrence · 9.1.0/changes/078

• Improve hypotenuse calculations for geometric operators Features

  Improve hypotenuse calculations for geometric operators (Paul Matthews)

  This avoids unnecessary overflows, and may also be more accurate.

  Original release occurrence · 9.1.0/changes/079

• Support hashing array values Features

  Support hashing array values (Tom Lane)

  This provides additional query optimization possibilities.

  Original release occurrence · 9.1.0/changes/080

• Don't treat a composite type as sortable unless all its column types are sortable Features

  Don't treat a composite type as sortable unless all its column types are sortable (Tom Lane)

  This avoids possible "could not identify a comparison function" failures at runtime, if it is possible to implement the query without sorting. Also, ANALYZE won't try to use inappropriate statistics-gathering methods for columns of such composite types.

  Original release occurrence · 9.1.0/changes/081

• Add support for casting between money and numeric Features

  Add support for casting between money and numeric (Andy Balholm)

  Original release occurrence · 9.1.0/changes/082

• Add support for casting from int4 and int8 to money Features

  Add support for casting from int4 and int8 to money (Joey Adams)

  Original release occurrence · 9.1.0/changes/083

• Allow casting a table's row type to the table's supertype if it's a typed table Features

  Allow casting a table's row type to the table's supertype if it's a typed table (Peter Eisentraut)

  This is analogous to the existing facility that allows casting a row type to a supertable's row type.

  Original release occurrence · 9.1.0/changes/084

• Add XML function XMLEXISTS and xpath_exists() functions Features

  Add XML function XMLEXISTS and xpath_exists() functions (Mike Fowler)

  These are used for XPath matching.

  Original release occurrence · 9.1.0/changes/085

• Add XML functions xml_is_well_formed(), xml_is_well_formed_document(), xml_is_well_formed_content() Features

  Add XML functions xml_is_well_formed(), xml_is_well_formed_document(), xml_is_well_formed_content() (Mike Fowler)

  These check whether the input is properly-formed XML. They provide functionality that was previously available only in the deprecated contrib/xml2 module.

  Original release occurrence · 9.1.0/changes/086

• Add SQL function format(text, ...), which behaves analogously to C's printf() Features

  Add SQL function format(text, ...), which behaves analogously to C's printf() (Pavel Stehule, Robert Haas)

  It currently supports formats for strings, SQL literals, and SQL identifiers.

  Original release occurrence · 9.1.0/changes/087

• Add string functions concat(), concat_ws(), left(), right(), and reverse() Features

  Add string functions concat(), concat_ws(), left(), right(), and reverse() (Pavel Stehule)

  These improve compatibility with other database products.

  Original release occurrence · 9.1.0/changes/088

• Add function pg_read_binary_file() to read binary files Features

  Add function pg_read_binary_file() to read binary files (Dimitri Fontaine, Itagaki Takahiro)

  Original release occurrence · 9.1.0/changes/089

• Add a single-parameter version of function pg_read_file() to read an entire file Features

  Add a single-parameter version of function pg_read_file() to read an entire file (Dimitri Fontaine, Itagaki Takahiro)

  Original release occurrence · 9.1.0/changes/090

• Add three-parameter forms of array_to_string() and string_to_array() for null value processing control Features

  Add three-parameter forms of array_to_string() and string_to_array() for null value processing control (Pavel Stehule)

  Original release occurrence · 9.1.0/changes/091

• Add the pg_describe_object() function Features

  Add the pg_describe_object() function (Alvaro Herrera)

  This function is used to obtain a human-readable string describing an object, based on the pg_class OID, object OID, and sub-object ID. It can be used to help interpret the contents of pg_depend.

  Original release occurrence · 9.1.0/changes/092

• Update comments for built-in operators and their underlying functions Features

  Update comments for built-in operators and their underlying functions (Tom Lane)

  Functions that are meant to be used via an associated operator are now commented as such.

  Original release occurrence · 9.1.0/changes/093

• Add variable quote_all_identifiers to force the quoting of all identifiers in EXPLAIN and in system catalog functions like pg_get_viewdef() Features

  Add variable quote_all_identifiers to force the quoting of all identifiers in EXPLAIN and in system catalog functions like pg_get_viewdef() (Robert Haas)

  This makes exporting schemas to tools and other databases with different quoting rules easier.

  Original release occurrence · 9.1.0/changes/094

• Add columns to the information_schema.sequences system view Features

  Add columns to the information_schema.sequences system view (Peter Eisentraut)

  Previously, though the view existed, the columns about the sequence parameters were unimplemented.

  Original release occurrence · 9.1.0/changes/095

• Allow public as a pseudo-role name in has_table_privilege() and related functions Features

  Allow public as a pseudo-role name in has_table_privilege() and related functions (Alvaro Herrera)

  This allows checking for public permissions.

  Original release occurrence · 9.1.0/changes/096

• Support INSTEAD OF triggers on views Features

  Support INSTEAD OF triggers on views (Dean Rasheed)

  This feature can be used to implement fully updatable views.

  Original release occurrence · 9.1.0/changes/097

• Add FOREACH IN ARRAY to PL/pgSQL Features

  Add FOREACH IN ARRAY to PL/pgSQL (Pavel Stehule)

  This is more efficient and readable than previous methods of iterating through the elements of an array value.

  Original release occurrence · 9.1.0/changes/098

• Allow RAISE without parameters to be caught in the same places that could catch a RAISE ERROR from the same location Features

  Allow RAISE without parameters to be caught in the same places that could catch a RAISE ERROR from the same location (Piyush Newe)

  The previous coding threw the error from the block containing the active exception handler. The new behavior is more consistent with other DBMS products.

  Original release occurrence · 9.1.0/changes/099

• Allow generic record arguments to PL/Perl functions Features

  Allow generic record arguments to PL/Perl functions (Andrew Dunstan)

  PL/Perl functions can now be declared to accept type record. The behavior is the same as for any named composite type.

  Original release occurrence · 9.1.0/changes/100

• Convert PL/Perl array arguments to Perl arrays Features

  Convert PL/Perl array arguments to Perl arrays (Alexey Klyukin, Alex Hunsaker)

  String representations are still available.

  Original release occurrence · 9.1.0/changes/101

• Convert PL/Perl composite-type arguments to Perl hashes Features

  Convert PL/Perl composite-type arguments to Perl hashes (Alexey Klyukin, Alex Hunsaker)

  String representations are still available.

  Original release occurrence · 9.1.0/changes/102

• Add table function support for PL/Python Features

  Add table function support for PL/Python (Jan Urbanski)

  PL/Python can now return multiple OUT parameters and record sets.

  Original release occurrence · 9.1.0/changes/103

• Add a validator to PL/Python Features

  Add a validator to PL/Python (Jan Urbanski)

  This allows PL/Python functions to be syntax-checked at function creation time.

  Original release occurrence · 9.1.0/changes/104

• Allow exceptions for SQL queries in PL/Python Features

  Allow exceptions for SQL queries in PL/Python (Jan Urbanski)

  This allows access to SQL-generated exception error codes from PL/Python exception blocks.

  Original release occurrence · 9.1.0/changes/105

• Add explicit subtransactions to PL/Python Features

  Add explicit subtransactions to PL/Python (Jan Urbanski)

  Original release occurrence · 9.1.0/changes/106

• Add PL/Python functions for quoting strings Features

  Add PL/Python functions for quoting strings (Jan Urbanski)

  These functions are plpy.quote_ident, plpy.quote_literal, and plpy.quote_nullable.

  Original release occurrence · 9.1.0/changes/107

• Add traceback information to PL/Python errors Features

  Add traceback information to PL/Python errors (Jan Urbanski)

  Original release occurrence · 9.1.0/changes/108

• Report PL/Python errors from iterators with PLy_elog Features

  Report PL/Python errors from iterators with PLy_elog (Jan Urbanski)

  Original release occurrence · 9.1.0/changes/109

• Fix exception handling with Python 3 Bug fixes

  Fix exception handling with Python 3 (Jan Urbanski)

  Exception classes were previously not available in plpy under Python 3.

  Original release occurrence · 9.1.0/changes/110

• Mark createlang and droplang as deprecated now that they just invoke extension commands Features

  Mark createlang and droplang as deprecated now that they just invoke extension commands (Tom Lane)

  Original release occurrence · 9.1.0/changes/111

• Add psql command \conninfo to show current connection information Features

  Add psql command \conninfo to show current connection information (David Christensen)

  Original release occurrence · 9.1.0/changes/112

• Add psql command \sf to show a function's definition Features

  Add psql command \sf to show a function's definition (Pavel Stehule)

  Original release occurrence · 9.1.0/changes/113

• Add psql command \dL to list languages Features

  Add psql command \dL to list languages (Fernando Ike)

  Original release occurrence · 9.1.0/changes/114

• Add the S ("system") option to psql's \dn (list schemas) command Features

  Add the S ("system") option to psql's \dn (list schemas) command (Tom Lane)

  \dn without S now suppresses system schemas.

  Original release occurrence · 9.1.0/changes/115

• Allow psql's \e and \ef commands to accept a line number to be used to position the cursor in the editor Features

  Allow psql's \e and \ef commands to accept a line number to be used to position the cursor in the editor (Pavel Stehule)

  This is passed to the editor according to the PSQL_EDITOR_LINENUMBER_ARG environment variable.

  Original release occurrence · 9.1.0/changes/116

• Have psql set the client encoding from the operating system locale by default Features

  Have psql set the client encoding from the operating system locale by default (Heikki Linnakangas)

  This only happens if the PGCLIENTENCODING environment variable is not set.

  Original release occurrence · 9.1.0/changes/117

• Make \d distinguish between unique indexes and unique constraints Features

  Make \d distinguish between unique indexes and unique constraints (Josh Kupershmidt)

  Original release occurrence · 9.1.0/changes/118

• Make \dt+ report pg_table_size instead of pg_relation_size when talking to 9.0 or later servers Features

  Make \dt+ report pg_table_size instead of pg_relation_size when talking to 9.0 or later servers (Bernd Helmle)

  This is a more useful measure of table size, but note that it is not identical to what was previously reported in the same display.

  Original release occurrence · 9.1.0/changes/119

• Additional tab completion support Features

  Additional tab completion support (Itagaki Takahiro, Pavel Stehule, Andrey Popp, Christoph Berg, David Fetter, Josh Kupershmidt)

  Original release occurrence · 9.1.0/changes/120

• Add pg_dump and pg_dumpall option --quote-all-identifiers to force quoting of all identifiers Features

  Add pg_dump and pg_dumpall option --quote-all-identifiers to force quoting of all identifiers (Robert Haas)

  Original release occurrence · 9.1.0/changes/121

• Add directory format to pg_dump Features

  Add directory format to pg_dump (Joachim Wieland, Heikki Linnakangas)

  This is internally similar to the tar pg_dump format.

  Original release occurrence · 9.1.0/changes/122

• Fix pg_ctl so it no longer incorrectly reports that the server is not running Bug fixes

  Fix pg_ctl so it no longer incorrectly reports that the server is not running (Bruce Momjian)

  Previously this could happen if the server was running but pg_ctl could not authenticate.

  Original release occurrence · 9.1.0/changes/123

• Improve pg_ctl start's "wait" (-w) option Features

  Improve pg_ctl start's "wait" (-w) option (Bruce Momjian, Tom Lane)

  The wait mode is now significantly more robust. It will not get confused by non-default postmaster port numbers, non-default Unix-domain socket locations, permission problems, or stale postmaster lock files.

  Original release occurrence · 9.1.0/changes/124

• Add promote option to pg_ctl to switch a standby server to primary Features

  Add promote option to pg_ctl to switch a standby server to primary (Fujii Masao)

  Original release occurrence · 9.1.0/changes/125

• Add a libpq connection option client_encoding which behaves like the PGCLIENTENCODING environment variable Features

  Add a libpq connection option client_encoding which behaves like the PGCLIENTENCODING environment variable (Heikki Linnakangas)

  The value auto sets the client encoding based on the operating system locale.

  Original release occurrence · 9.1.0/changes/126

• Add PQlibVersion() function which returns the libpq library version Features

  Add PQlibVersion() function which returns the libpq library version (Magnus Hagander)

  libpq already had PQserverVersion() which returns the server version.

  Original release occurrence · 9.1.0/changes/127

• Allow libpq-using clients to check the user name of the server process when connecting via Unix-domain sockets, with the new requirepeer connection option Features

  Allow libpq-using clients to check the user name of the server process when connecting via Unix-domain sockets, with the new requirepeer connection option (Peter Eisentraut)

  PostgreSQL already allowed servers to check the client user name when connecting via Unix-domain sockets.

  Original release occurrence · 9.1.0/changes/128

• Add PQping() and PQpingParams() to libpq Features

  Add PQping() and PQpingParams() to libpq (Bruce Momjian, Tom Lane)

  These functions allow detection of the server's status without trying to open a new session.

  Original release occurrence · 9.1.0/changes/129

• Allow ECPG to accept dynamic cursor names even in WHERE CURRENT OF clauses Features

  Allow ECPG to accept dynamic cursor names even in WHERE CURRENT OF clauses (Zoltan Boszormenyi)

  Original release occurrence · 9.1.0/changes/130

• Make ecpglib write double values with a precision of 15 digits, not 14 as formerly Features

  Make ecpglib write double values with a precision of 15 digits, not 14 as formerly (Akira Kurosawa)

  Original release occurrence · 9.1.0/changes/131

• Use +Olibmerrno compile flag with HP-UX C compilers that accept it Features

  Use +Olibmerrno compile flag with HP-UX C compilers that accept it (Ibrar Ahmed)

  This avoids possible misbehavior of math library calls on recent HP platforms.

  Original release occurrence · 9.1.0/changes/132

• Improved parallel make support Features

  Improved parallel make support (Peter Eisentraut)

  This allows for faster compiles. Also, make -k now works more consistently.

  Original release occurrence · 9.1.0/changes/133

• Require GNU make 3.80 or newer Features

  Require GNU make 3.80 or newer (Peter Eisentraut)

  This is necessary because of the parallel-make improvements.

  Original release occurrence · 9.1.0/changes/134

• Add make maintainer-check target Features

  Add make maintainer-check target (Peter Eisentraut)

  This target performs various source code checks that are not appropriate for either the build or the regression tests. Currently: duplicate_oids, SGML syntax and tabs check, NLS syntax check.

  Original release occurrence · 9.1.0/changes/135

• Support make check in contrib Features

  Support make check in contrib (Peter Eisentraut)

  Formerly only make installcheck worked, but now there is support for testing in a temporary installation. The top-level make check-world target now includes testing contrib this way.

  Original release occurrence · 9.1.0/changes/136

• On Windows, allow pg_ctl to register the service as auto-start or start-on-demand Features

  On Windows, allow pg_ctl to register the service as auto-start or start-on-demand (Quan Zongliang)

  Original release occurrence · 9.1.0/changes/137

• Add support for collecting crash dumps on Windows Features

  Add support for collecting crash dumps on Windows (Craig Ringer, Magnus Hagander)

  minidumps can now be generated by non-debug Windows binaries and analyzed by standard debugging tools.

  Original release occurrence · 9.1.0/changes/138

• Enable building with the MinGW64 compiler Features

  Enable building with the MinGW64 compiler (Andrew Dunstan)

  This allows building 64-bit Windows binaries even on non-Windows platforms via cross-compiling.

  Original release occurrence · 9.1.0/changes/139

• Revise the API for GUC variable assign hooks Features

  Revise the API for GUC variable assign hooks (Tom Lane)

  The previous functions of assign hooks are now split between check hooks and assign hooks, where the former can fail but the latter shouldn't. This change will impact add-on modules that define custom GUC parameters.

  Original release occurrence · 9.1.0/changes/140

• Add latches to the source code to support waiting for events Features

  Add latches to the source code to support waiting for events (Heikki Linnakangas)

  Original release occurrence · 9.1.0/changes/141

• Centralize data modification permissions-checking logic Features

  Centralize data modification permissions-checking logic (KaiGai Kohei)

  Original release occurrence · 9.1.0/changes/142

• Add missing get_object_oid() functions, for consistency Features

  Add missing get_object_oid() functions, for consistency (Robert Haas)

  Original release occurrence · 9.1.0/changes/143

• Improve ability to use C++ compilers for compiling add-on modules by removing conflicting key words Features

  Improve ability to use C++ compilers for compiling add-on modules by removing conflicting key words (Tom Lane)

  Original release occurrence · 9.1.0/changes/144

• Add support for DragonFly BSD Features

  Add support for DragonFly BSD (Rumko)

  Original release occurrence · 9.1.0/changes/145

• Expose quote_literal_cstr() for backend use Features

  Expose quote_literal_cstr() for backend use (Robert Haas)

  Original release occurrence · 9.1.0/changes/146

• Run regression tests in the default encoding Features

  Run regression tests in the default encoding (Peter Eisentraut)

  Regression tests were previously always run with SQL_ASCII encoding.

  Original release occurrence · 9.1.0/changes/147

• Add src/tools/git_changelog to replace cvs2cl and pgcvslog Features

  Add src/tools/git_changelog to replace cvs2cl and pgcvslog (Robert Haas, Tom Lane)

  Original release occurrence · 9.1.0/changes/148

• Add git-external-diff script to src/tools Features

  Add git-external-diff script to src/tools (Bruce Momjian)

  This is used to generate context diffs from git.

  Original release occurrence · 9.1.0/changes/149

• Improve support for building with Clang Features

  Improve support for building with Clang (Peter Eisentraut)

  Original release occurrence · 9.1.0/changes/150

• Add source code hooks to check permissions Features

  Add source code hooks to check permissions (Robert Haas, Stephen Frost)

  Original release occurrence · 9.1.0/changes/151

• Add post-object-creation function hooks for use by security frameworks Features

  Add post-object-creation function hooks for use by security frameworks (KaiGai Kohei)

  Original release occurrence · 9.1.0/changes/152

• Add a client authentication hook Features

  Add a client authentication hook (KaiGai Kohei)

  Original release occurrence · 9.1.0/changes/153

• Modify contrib modules and procedural languages to install via the new extension mechanism Features

  Modify contrib modules and procedural languages to install via the new extension mechanism (Tom Lane, Dimitri Fontaine)

  Original release occurrence · 9.1.0/changes/154

• Add contrib/file_fdw foreign-data wrapper Features

  Add contrib/file_fdw foreign-data wrapper (Shigeru Hanada)

  Foreign tables using this foreign data wrapper can read flat files in a manner very similar to COPY.

  Original release occurrence · 9.1.0/changes/155

• Add nearest-neighbor search support to contrib/pg_trgm and contrib/btree_gist Features

  Add nearest-neighbor search support to contrib/pg_trgm and contrib/btree_gist (Teodor Sigaev)

  Original release occurrence · 9.1.0/changes/156

• Add contrib/btree_gist support for searching on not-equals Features

  Add contrib/btree_gist support for searching on not-equals (Jeff Davis)

  Original release occurrence · 9.1.0/changes/157

• Fix contrib/fuzzystrmatch's levenshtein() function to handle multibyte characters Bug fixes

  Fix contrib/fuzzystrmatch's levenshtein() function to handle multibyte characters (Alexander Korotkov)

  Original release occurrence · 9.1.0/changes/158

• Add ssl_cipher() and ssl_version() functions to contrib/sslinfo Features

  Add ssl_cipher() and ssl_version() functions to contrib/sslinfo (Robert Haas)

  Original release occurrence · 9.1.0/changes/159

• Fix contrib/intarray and contrib/hstore to give consistent results with indexed empty arrays Bug fixes

  Fix contrib/intarray and contrib/hstore to give consistent results with indexed empty arrays (Tom Lane)

  Previously an empty-array query that used an index might return different results from one that used a sequential scan.

  Original release occurrence · 9.1.0/changes/160

• Allow contrib/intarray to work properly on multidimensional arrays Features

  Allow contrib/intarray to work properly on multidimensional arrays (Tom Lane)

  Original release occurrence · 9.1.0/changes/161

• In contrib/intarray, avoid errors complaining about the presence of nulls in cases where no nulls are actually present Features

  In contrib/intarray, avoid errors complaining about the presence of nulls in cases where no nulls are actually present (Tom Lane)

  Original release occurrence · 9.1.0/changes/162

• In contrib/intarray, fix behavior of containment operators with respect to empty arrays Bug fixes

  In contrib/intarray, fix behavior of containment operators with respect to empty arrays (Tom Lane)

  Empty arrays are now correctly considered to be contained in any other array.

  Original release occurrence · 9.1.0/changes/163

• Remove contrib/xml2's arbitrary limit on the number of parameter=value pairs that can be handled by xslt_process() Features

  Remove contrib/xml2's arbitrary limit on the number of parameter=value pairs that can be handled by xslt_process() (Pavel Stehule)

  The previous limit was 10.

  Original release occurrence · 9.1.0/changes/164

• In contrib/pageinspect, fix heap_page_item to return infomasks as 32-bit values Bug fixes

  In contrib/pageinspect, fix heap_page_item to return infomasks as 32-bit values (Alvaro Herrera)

  This avoids returning negative values, which was confusing. The underlying value is a 16-bit unsigned integer.

  Original release occurrence · 9.1.0/changes/165

• Add contrib/sepgsql to interface permission checks with SELinux Features

  Add contrib/sepgsql to interface permission checks with SELinux (KaiGai Kohei)

  This uses the new SECURITY LABEL facility.

  Original release occurrence · 9.1.0/changes/166

• Add contrib module auth_delay Features

  Add contrib module auth_delay (KaiGai Kohei)

  This causes the server to pause before returning authentication failure; it is designed to make brute force password attacks more difficult.

  Original release occurrence · 9.1.0/changes/167

• Add dummy_seclabel contrib module Features

  Add dummy_seclabel contrib module (KaiGai Kohei)

  This is used for permission regression testing.

  Original release occurrence · 9.1.0/changes/168

• Add support for LIKE and ILIKE index searches to contrib/pg_trgm Features

  Add support for LIKE and ILIKE index searches to contrib/pg_trgm (Alexander Korotkov)

  Original release occurrence · 9.1.0/changes/169

• Add levenshtein_less_equal() function to contrib/fuzzystrmatch, which is optimized for small distances Features

  Add levenshtein_less_equal() function to contrib/fuzzystrmatch, which is optimized for small distances (Alexander Korotkov)

  Original release occurrence · 9.1.0/changes/170

• Improve performance of index lookups on contrib/seg columns Performance

  Improve performance of index lookups on contrib/seg columns (Alexander Korotkov)

  Original release occurrence · 9.1.0/changes/171

• Improve performance of pg_upgrade for databases with many relations Performance

  Improve performance of pg_upgrade for databases with many relations (Bruce Momjian)

  Original release occurrence · 9.1.0/changes/172

• Add flag to contrib/pgbench to report per-statement latencies Features

  Add flag to contrib/pgbench to report per-statement latencies (Florian Pflug)

  Original release occurrence · 9.1.0/changes/173

• Move src/tools/test_fsync to contrib/pg_test_fsync Features

  Move src/tools/test_fsync to contrib/pg_test_fsync (Bruce Momjian, Tom Lane)

  Original release occurrence · 9.1.0/changes/174

• Add O_DIRECT support to contrib/pg_test_fsync Features

  Add O_DIRECT support to contrib/pg_test_fsync (Bruce Momjian)

  This matches the use of O_DIRECT by wal_sync_method.

  Original release occurrence · 9.1.0/changes/175

• Add new tests to contrib/pg_test_fsync Features

  Add new tests to contrib/pg_test_fsync (Bruce Momjian)

  Original release occurrence · 9.1.0/changes/176

• Extensive ECPG documentation improvements Features

  Extensive ECPG documentation improvements (Satoshi Nagayasu)

  Original release occurrence · 9.1.0/changes/177

• Extensive proofreading and documentation improvements Features

  Extensive proofreading and documentation improvements (Thom Brown, Josh Kupershmidt, Susanne Ebrecht)

  Original release occurrence · 9.1.0/changes/178

• Add documentation for exit_on_error Features

  Add documentation for exit_on_error (Robert Haas)

  This parameter causes sessions to exit on any error.

  Original release occurrence · 9.1.0/changes/179

• Add documentation for pg_options_to_table() Features

  Add documentation for pg_options_to_table() (Josh Berkus)

  This function shows table storage options in a readable form.

  Original release occurrence · 9.1.0/changes/180

• Document that it is possible to access all composite type fields using (compositeval).* syntax Features

  Document that it is possible to access all composite type fields using (compositeval).* syntax (Peter Eisentraut)

  Original release occurrence · 9.1.0/changes/181

• Document that translate() removes characters in from that don't have a corresponding to character Features

  Document that translate() removes characters in from that don't have a corresponding to character (Josh Kupershmidt)

  Original release occurrence · 9.1.0/changes/182

• Merge documentation for CREATE CONSTRAINT TRIGGER and CREATE TRIGGER Features

  Merge documentation for CREATE CONSTRAINT TRIGGER and CREATE TRIGGER (Alvaro Herrera)

  Original release occurrence · 9.1.0/changes/183

• Centralize permission and upgrade documentation Features

  Centralize permission and upgrade documentation (Bruce Momjian)

  Original release occurrence · 9.1.0/changes/184

• Add kernel tuning documentation for Solaris 10 Features

  Add kernel tuning documentation for Solaris 10 (Josh Berkus)

  Previously only Solaris 9 kernel tuning was documented.

  Original release occurrence · 9.1.0/changes/185

• Handle non-ASCII characters consistently in HISTORY file Features

  Handle non-ASCII characters consistently in HISTORY file (Peter Eisentraut)

  While the HISTORY file is in English, we do have to deal with non-ASCII letters in contributor names. These are now transliterated so that they are reasonably legible without assumptions about character set.

  Original release occurrence · 9.1.0/changes/186

Security evidence

35 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.