--- /dev/null
+
+
+
+
+
Release 9.5
+
+
+
Release Date
+ 2015-XX-XX
+
+
+
+
Overview
+
+ Major enhancements in
PostgreSQL 9.5 include:+
+
+
+
+
+
+
+
+
+
+
+
+ The above items are explained in more detail in the sections below.
+
+
+
+
+
+
+
Migration to Version 9.5
+
+ A dump/restore using , or use
+ of , is required for those wishing to migrate
+ data from any previous release.
+
+
+ Version 9.5 contains a number of changes that may affect compatibility
+ with previous releases. Observe the following incompatibilities:
+
+
+
+
+
+ Adjust operator precedence to match the
SQL standard+ (Tom Lane)
+
+
+ "<" and ">" now have the same precedence as "<="
+ ">=" and "<>", and IS now has lower
+ precedence. NOT now also has symmetric precedence.
+ The
GUC operator_precedence_warning can be+ enabled to warn about queries where the precedence has changed.
+
+
+
+
+ Use cast conversions for
PL/pgSQL type conversions,+ rather than converting to and from text (Tom Lane)
+
+
+ This causes conversions of booleans to strings to
+ return true or false, not
+ t/f.
+
+
+
+
+ Allow special characters in server startup option values to be
+ escaped with a backslash (Andres Freund)
+
+
+ This allows characters like spaces to be passed inside option values.
+ Passing a backslash now requires supplying a double-backslash.
+
+
+
+
+ Set the default value of include_realm to not remove
+ the
GSS and SSPI realm from the principal+ (Stephen Frost)
+
+
+
+
+ Fix REASSIGN and ALTER OWNER TO to properly
+ reassign ownership of types, foreign data wrappers, and foreign
+ servers (Bruce Momjian)
+
+
+
+
+ Remove server-side
GUC autocommit, which+ was already deprecated and non-operational (Tom Lane)
+
+
+
+
+ Remove pg_authid.rolcatupdate, as it
+ had no purpose (Adam Brightwell)
+
+
+
+
+
+
+
+
+
Changes
+
+ Below you will find a detailed account of the changes between
+
PostgreSQL 9.5 and the previous major
+ release.
+
+
+
+
Server
+
+
+
Indexes
+
+
+
+
+ Add Block Range Indexes (
BRIN) (Álvaro Herrera,+ Heikki Linnakangas, Emre Hasegeli)
+
+
+
BRIN indexes are very compact and store the min/max+ values for a range of heap blocks.
+
+
+
+
+ Allow queries to perform accurate distance filtering of
+ bounding-box-indexed objects (polygons, circles) using GiST indexes
+ (Alexander Korotkov, Heikki Linnakangas)
+
+
+ Previously, a common table expression was required to return a
+ large number of rows ordered by bounding-box distance, and then
+ filtered further with a more accurate non-bounding-box distance
+ calculation.
+
+
+
+
+ Allow GiST indexes to perform index-only scans (Anastasia
+ Lubennikova, Heikki Linnakangas, Andreas Karlsson)
+
+
+
+
+ Add
GUC gin_pending_list_limit to control+ the size of
GIN pending lists (Fujii Masao)+
+
+ Previously this was controlled by work_mem. This can
+ also be set as an index storage parameter.
+
+
+
+
+ Issue a warning during the creation of hash indexes because they
+ are not crash-safe (Bruce Momjian)
+
+
+
+
+
+
+
+
+
General Performance
+
+
+
+
+ Improve the speed of sorting character and numeric fields (Robert
+ Haas, Peter Geoghegan, Andrew Gierth)
+
+
+
+
+ Improve hash creation performance (Tomas Vondra, Teodor Sigaev,
+ Tom Lane)
+
+
+
+
+ Improve concurrency of shared buffer replacement (Robert Haas,
+ Amit Kapila)
+
+
+
+
+ Improve concurrent locking and buffer scan performance (Andres
+ Freund, Kevin Grittner)
+
+
+
+
+ Speed up
CRC (cyclic redundancy check) computations+ (Abhijit Menon-Sen, Heikki Linnakangas)
+
+
+ Also use
CPU instructions for CRC+ calculations, if supported
+
+
+
+
+
+
+
+
+
Monitoring
+
+
+
+
+ Add per-table autovacuum logging control via
+ log_min_autovacuum_duration (Michael Paquier)
+
+
+
+
+ Add
GUC variable cluster_name (Thomas+ Munro)
+
+
+ This string, set in postgresql.conf, allows clients
+ to query the cluster name. This name also appears in the process
+ title, allowing for easier grouping of processes belonging to
+ the same cluster.
+
+
+
+
+ Prevent non-superusers from changing log_disconnections
+ on connection startup (Fujii Masao)
+
+
+
+
+
+
+
+
+
<acronym>SSL</>
+
+
+
+
+ Check
Subject Alternative Names in SSL
+ server certificates, if present (Alexey Klyukin)
+
+
+ Their presence replaces checks against the certificate's
+ Common Name.
+
+
+
+
+ Add system view pg_stat_ssl to report
+
SSL connection information (Magnus Hagander)+
+
+
+
+ Add
libpq function PQsslAttribute()+ that returns
SSL information (Heikki Linnakangas)+
+
+ While PQgetssl() can still be used
+ to then call
OpenSSL functions,+
PQsslAttribute() returns SSL+ information in an
SSL-implementation-independent way.+ (Future versions of libpq might support other
SSL+ implementations.)
+
+
+
+
+ Have
libpq honor any OpenSSL+ thread callbacks (Jan Urbanski)
+
+
+ Previously they were overwritten.
+
+
+
+
+
+
+
+
+
Server Settings
+
+
+
+
+ Replace checkpoint_segments with
+ min_wal_size and max_wal_size (Heikki
+ Linnakangas)
+
+
+ This allows the allocation of a large number of
WAL+ files without keeping them if they are not needed.
+
+
+
+
+ Add
GUC wal_compression to enable+ compression of full page images stored in
WAL+ (Rahila Syed, Michael Paquier)
+
+
+
+
+ Allow the recording of transaction commit timestamps when
+
GUC track_commit_timestamp is enabled+ (Álvaro Herrera, Petr Jelinek)
+
+
+ Timestamp information can be accessed using
+ functions pg_xact_commit_timestamp() and
+ pg_last_committed_xact().
+
+
+
+
+ Allow local_preload_libraries to be set by
+ ALTER ROLE SET (Peter Eisentraut, Kyotaro Horiguchi)
+
+
+
+
+ Allow running autovacuum workers to respond to configuration
+ parameter changes (Michael Paquier)
+
+
+
+
+ Make
GUC debug_assertions read-only+ (Andres Freund)
+
+
+ This means that assertions can no longer be turned off once enabled
+ at compile-time, allowing for more efficient code optimization.
+ This also removed the postgres
+
+
+
+
+ Allow setting effective_io_concurrency on systems
+ where it has no effect (Peter Eisentraut)
+
+
+
+
+ Add environment variables PG_OOM_ADJUST_FILE and
+
PG_OOM_ADJUST_VALUE to control Linux OOM+ killer (Gurjeet Singh)
+
+
+ The previous
OOM control involved a compile-time+ option.
+
+
+
+
+ Add function and view pg_file_settings to show
+ the source of
GUC values set in configuration files+ (Sawada Masahiko)
+
+
+
+
+ Add pending_restart to the system view
+ pg_settings to indicate a change is pending a
+ restart (Peter Eisentraut)
+
+
+
+
+ Allow ALTER SYSTEM values to be reset with
+ ALTER SYSTEM RESET (Vik Fearing)
+
+
+ This removes the setting from postgresql.auto.conf.
+
+
+
+
+
+
+
+
+
+
+
Replication and Recovery
+
+
+
+
+ Add recovery.conf parameter
+ recovery_target_action to control post-recovery
+ activity (Petr Jelinek)
+
+
+
GUC pause_at_recovery_target was also+ removed.
+
+
+
+
+
+ Add archive_mode always to allow standbys
+ to always archive received
WAL files (Fujii Masao)+
+
+
+
+ Add
GUC wal_retrieve_retry_interval to+ control
WAL read retry after failure (Alexey Vasiliev,+ Michael Paquier)
+
+
+ This is particularly helpful for warm standbys.
+
+
+
+
+ Archive
WAL files with suffix .partial+ during standby promotion (Heikki Linnakangas)
+
+
+
+
+ Add
GUC log_replication_commands to log+ replication commands (Fujii Masao)
+
+
+ By default, replication commands,
+ e.g. IDENTIFY_COMMAND, are not logged, even when
+ log_statements is set to all.
+
+
+
+
+ Allow the labeling of the origin of logical replication changes
+ (Andres Freund)
+
+
+ This helps with change tracking.
+
+
+
+
+ Report the backends holding replication slots in
+ pg_replication_slots (Craig Ringer)
+
+
+ The new output column is active_pid.
+
+
+
+
+ Allow recovery.conf's primary_conninfo
+ to use connection
URIs, e.g. postgres://+ (Alex Shulgin)
+
+
+
+
+
+
+
+
+
Queries
+
+
+
+
+ Allow INSERTS that would generate constraint conflicts
+ to be turned into UPDATEs or ignored (Peter Geoghegan,
+ Heikki Linnakangas, Andres Freund)
+
+
+ The syntax is INSERT ... ON CONFLICT DO NOTHING/UPDATE.
+ This is the Postgres implementation of the popular
+ UPSERT command.
+
+
+
+
+ Add GROUP BY analysis functions GROUPING
+ SETS, CUBE and ROLLUP (Andrew Gierth,
+ Atri Sharma)
+
+
+
+
+ Allow multi-column UPDATEs with a single subselect
+ (Tom Lane)
+
+
+ This is accomplished using the syntax UPDATE tab SET
+ (col1, col2, ...) = (SELECT ...).
+
+
+
+
+ Add new SELECT option SKIP LOCKED to skip
+ locked rows (Thomas Munro)
+
+
+ This does not throw an error for locked rows like
+ NOWAIT does.
+
+
+
+
+ Add SELECT option TABLESAMPLE to return
+ a subset of a table (Petr Jelinek)
+
+
+
+
+ Suggest possible matches for mistyped column names (Peter
+ Geoghegan, Robert Haas)
+
+
+
+
+
+
+
+
+
Utility Commands
+
+
+
+
+ Add more details about sort ordering in EXPLAIN output
+ (Marius Timmer, Lukas Kreft, Arne Scheffer)
+
+
+ Details include COLLATE, DESC,
+ USING, and NULLS FIRST/LAST.
+
+
+
+
+ Have VACUUM log the number of pages skipped due to pins
+ (Jim Nasby)
+
+
+
+
+ Have TRUNCATE properly update the pg_stat*
+ tuple counters (Alexander Shulgin)
+
+
+
+
+
+
+
<xref linkend="SQL-REINDEX">
+
+
+
+
+ Allow REINDEX to reindex an entire schema using the
+ SCHEMA option (Sawada Masahiko)
+
+
+
+
+ Add VERBOSE option to REINDEX (Fujii Masao)
+
+
+
+
+ Prevent REINDEX DATABASE and SCHEMA
+ from outputting object names, unless VERBOSE is used
+ (Simon Riggs)
+
+
+
+
+ Remove obsolete FORCE option from REINDEX
+ (Fujii Masao)
+
+
+
+
+
+
+
+
+
+
Object Manipulation
+
+
+
+
+ Add row-level security control (Craig Ringer, KaiGai Kohei,
+ Adam Brightwell, Dean Rasheed, Stephen Frost)
+
+
+ This controls viewing and adding/modifying rows via new commands
+ CREATE/ALTER/DROP POLICY
+ and ALTER TABLE ... ENABLE/DISABLE ROW SECURITY.
+
+
+
+
+ Allow control of table
WAL logging after table+ creation with ALTER TABLE .. SET LOGGED / UNLOGGED
+ (Fabrízio de Royes Mello)
+
+
+
+
+ Add IF NOT EXISTS clause to CREATE TABLE
+ AS, CREATE INDEX, CREATE SEQUENCE,
+ and CREATE MATERIALIZED VIEW (Fabrízio de
+ Royes Mello)
+
+
+
+
+ Add support for IF EXISTS to ALTER TABLE
+ ... RENAME CONSTRAINT (Bruce Momjian)
+
+
+
+
+ Allow CURRENT/SESSION_USER to specify the
+ current user in certain (Kyotaro Horiguchi, Álvaro Herrera)
+
+
+ Commands include ALTER USER, ALTER
+ GROUP, ALTER ROLE, GRANT, and various
+ ALTER OBJECT / OWNER TO commands.
+
+
+
+
+ Allow comments on domain constraints (Álvaro Herrera)
+
+
+
+
+ Reduce lock levels of some create and alter trigger and foreign
+ key commands (Simon Riggs, Andreas Karlsson)
+
+
+
+
+ Allow LOCK TABLE .. ROW EXCLUSIVE MODE for those with
+ INSERT privileges (Stephen Frost)
+
+
+ Previously only UPDATE, DELETE, and
+ TRUNCATE privileges allowed this.
+
+
+
+
+ Apply table and domain CHECK constraints in name order
+ (Tom Lane)
+
+
+ The previous order was indeterminate.
+
+
+
+
+ Allow CREATE/ALTER DATABASE to manipulate
+ datistemplate and datallowconn
+ (Vik Fearing)
+
+
+ This allows these database settings to be changed more easily
+ than modifying the pg_database system table.
+
+
+
+
+ Have CREATE TABLE AS and REFRESH return
+ an OID (Álvaro Herrera)
+
+
+ RETURN WHERE
+
+
+
+
+
+
+
<xref linkend="SQL-CREATEFOREIGNDATAWRAPPER">
+
+
+
+
+ Add support for IMPORT FOREIGN SCHEMA (Ronan Dunklau,
+ Michael Paquier, Tom Lane)
+
+
+ This allows the creation of local foreign tables definitions
+ that match the remote table structure. Currently, only the
+
postgres_fdw foreign data wrapper supports this+ feature.
+
+
+
+
+ Allow foreign tables to participate in inheritance (Shigeru Hanada,
+ Etsuro Fujita)
+
+
+ This also allows foreign tables to mark check constraints as not
+ valid, and to set storage and OID characteristics.
+
+
+
+
+ Allow CHECK constraints to be placed on foreign tables
+ (Shigeru Hanada, Etsuro Fujita)
+
+
+ These checks are assumed to be enforced on the remote server,
+ and are not checked locally. However, they are considered for
+ optimization and constraint-exclusion checking.
+
+
+
+
+ Allow foreign data wrappers and custom scans to implement join
+ pushdown (KaiGai Kohei)
+
+
+
+
+
+
+
+
+
<xref linkend="SQL-CREATEEVENTTRIGGER">
+
+
+
+
+ Add pg_event_trigger_ddl_commands set-returning
+ function, which returns
DDL activity associated with+ event triggers (Álvaro Herrera)
+
+
+
+
+ Allow event triggers on table rewrites caused by ALTER
+ TABLE (Dimitri Fontaine)
+
+
+
+
+ Add event trigger support for database-level
+ COMMENT, SECURITY LABEL, and
+ GRANT/REVOKE (Álvaro Herrera)
+
+
+
+
+ Add columns to the output of
+ pg_event_trigger_dropped_objects (Álvaro
+ Herrera)
+
+
+ This allows simpler processing of delete operations.
+
+
+
+
+
+
+
+
+
+
+
Data Types
+
+
+
+
+ Allow the XML data type to accept empty or all-whitespace
+ values (Peter Eisentraut)
+
+
+ This is required by the
SQL/XML+ specification.
+
+
+
+
+ Fix XML xpath handling to return namespace declarations
+ even if the namespace is in a parent element (Ali Akbar)
+
+
+ Previously the namespace was not returned, leading to invalid
+ XML.
+
+
+
+
+ Allow macaddr input using the format
+ xxxx-xxxx-xxxx (Herwin Weststrate)
+
+
+
+
+ Tighten specification of INTERVAL precision specifications
+ (Bruce Momjian)
+
+
+ Only allow interval precision to be specified after the
+ INTERVAL keyword if no units are specified.
+
+
+
+
+ Add selectivity estimators for INET/CIDR operators
+ and improve estimators for text search functions (Emre Hasegeli,
+ Tom Lane)
+
+
+
+
+
+
+
<link linkend="datatype-json"><acronym>JSON</></link>
+
+
+
+
+ Add JSONB functions jsonb_set() and
+ jsonb_pretty (Dmitry Dolgov, Andrew Dunstan)
+
+
+
+
+ Add several generator functions for JSONB that exist
+ for JSON (Andrew Dunstan)
+
+
+ The functions are to_jsonb(),
+ jsonb_object(), jsonb_build_object(),
+ jsonb_build_array(), jsonb_agg(),
+ and jsonb_object_agg().
+
+
+
+
+ Reduce casting requirements to/from JSON and
+ JSONB (Tom Lane)
+
+
+
+
+ Allow TEXT, TEXT array, and INTEGER
+ values to be subtracted from JSONB documents (Dmitry
+ Dolgov, Andrew Dunstan)
+
+
+
+
+ Add JSONB operator || (Dmitry Dolgov, Andrew Dunstan)
+
+
+
+
+ Add json_strip_nulls() and
+ jsonb_strip_nulls() functions to remove JSON
+ null values from documents (Andrew Dunstan)
+
+
+
+
+
+
+
+
+
+
+
Functions
+
+
+
+
+ Add generate_series() for NUMERIC values
+ (Plato Malugin)
+
+
+
+
+ Allow array_agg() and ARRAY() to take
+ arrays as inputs (Ali Akbar, Tom Lane)
+
+
+
+
+ Add functions array_position() and
+ array_positions() to return subscripts of array values
+ (Pavel Stehule)
+
+
+
+
+ Add point-to-polygon distance operator
+ (<->) (Alexander Korotkov)
+
+
+
+
+ Allow multi-byte characters as escape in SIMILAR TO
+ and SUBSTRING (Jeff Davis)
+
+
+ Previously, only a single-byte character was allowed as an escape.
+
+
+
+
+ Add width_bucket() which supports any sortable data
+ type and non-uniform bucket widths (Petr Jelinek)
+
+
+
+
+ Allow => to specify named parameters in function calls
+ (Pavel Stehule)
+
+
+ User-defined => operators have been issuing warnings since
+ Postgres 9.0, and were removed in hstore in 9.2. Previously only
+ := could be used.
+
+
+
+
+ Add
POSIX-compliant rounding for platforms that use+ Postgres-supplied rounding functions (Pedro Gimeno Fortea)
+
+
+
+
+
+
+
System Information Functions and Views
+
+
+
+
+ Add function pg_get_object_address() to return
+ OIDs that uniquely identify an object (Álvaro
+ Herrera)
+
+
+
+
+ Add function pg_identify_object_as_address() to return
+ object information based on OIDs (Álvaro Herrera)
+
+
+
+
+ Loosen security checks for viewing pg_stat_activity,
+ pg_cancel_backend(), and
+ pg_terminate_backend (Stephen Frost)
+
+
+ Now, role membership is sufficient; previously only the same
+ role could perform such operations.
+
+
+
+
+ Add pg_stat_get_snapshot_timestamp() to output the
+ timestamp of the statistics snapshot (Matt Kelly)
+
+
+ WHAT IS A STATISTICS SNAPSHOT?
+
+
+
+
+ Add mxid_age() to compute multi-xid age (Bruce
+ Momjian)
+
+
+
+
+ Add data type regrole that returns the OID
+ of a role (Kyotaro Horiguchi)
+
+
+
+
+ Add data type regnamespace that returns the OID
+ of a schema (Kyotaro Horiguchi)
+
+
+
+
+
+
+
+
+
Aggregates
+
+
+
+
+ Add MIN()/MAX() aggregates for
+ INET/CIDR data types (Haribabu Kommi)
+
+
+
+
+ Use 128-bit integers, where supported, as aggregate accumulators
+ (Andreas Karlsson)
+
+
+
+
+
+
+
+
+
+
+
Server-Side Languages
+
+
+
+
+ Improve support for composite types in
PL/Python+ (Ed Behn, Ronan Dunklau)
+
+
+ This allows
PL/Python functions to return arrays+ of composite types.
+
+
+
+
+ Reduce lossiness of
PL/Python floating value+ conversions (Marko Kreen)
+
+
+
+
+ Add specification of conversion routines to/from
SQL+ data types to procedural languages data types (Peter Eisentraut)
+
+
+ This adds new commands CREATE/DROP
+ TRANSFORM. This also adds transformations between
+
hstore and ltree to/from+
+
+
+
+
+
+
<link linkend="plpgsql">PL/pgSQL</link> Server-Side Language
+
+
+
+
+ Improve
PL/pgSQL array performance (Tom Lane)+
+
+
+
+ Add
ASSERT statement in PL/pgSQL+ (Pavel Stehule)
+
+
+
+
+ Allow more
PL/pgSQL keywords to be used as+ identifiers (Tom Lane)
+
+
+
+
+
+
+
+
+
+
+
Client Applications
+
+
+
+
+ Move
pg_archivecleanup,+
pg_test_fsync, pg_test_timing,+ and
pg_xlogdump from contrib to+ src/bin (Peter Eisentraut)
+
+
+
+
+ Allow
pg_receivexlog to manage physical replication+ slots (Michael Paquier)
+
+
+ This is controlled via new
+
+
+
+
+
+ Allow the
pg_receivexlog to synchronously flush+
WAL to storage using + Osamu, Fujii Masao)
+
+
+ Without this,
WAL files are fsynced only on close.+
+
+
+
+ Allow vacuumdb to vacuum in parallel using
+
+
+
+
+
+ Add
+ (Sawada Masahiko)
+
+
+
+
+ Have
pg_basebackup use a tablespace mapping file,+ to allow for file paths of 100+ characters in length (Amit Kapila)
+
+
+
+
+
+
+
<xref linkend="APP-PSQL">
+
+
+
+
+ Allow
psql to produce AsciiDoc output (Szymon Guz)+
+
+
+
+ Add
errors mode to psql's+ ECHO variable to display only failed commands
+ (Pavel Stehule)
+
+
+ This can also be enabled with the
psql+
+
+
+
+
+ Allow column, header, and border control to
psql's+ Unicode style (Pavel Stehule)
+
+
+ Single or double output is supported; the default is
+ single.
+
+
+
+
+ Add
psql PROMPT variable option+ (%l) to display the multi-line statement line number
+ (Sawada Masahiko)
+
+
+
+
+ Add
psql setting pager_min_lines+ setting to control pager invocation (Andrew Dunstan)
+
+
+
+
+ Improve
psql line counting used when deciding+ to invoke the pager (Andrew Dunstan)
+
+
+
+
+ Add
psql tab completion when setting the+ search_path variable (Jeff Janes)
+
+
+ Currently only the first schema can be tab-completed.
+
+
+
+
+ Improve
psql tab-completion for triggers and rules+ (Andreas Karlsson)
+
+
+
+
+
+
+
<link linkend="APP-PSQL-meta-commands">Backslash Commands</link>
+
+
+
+
+ Add
psql \? help sections+ variables and options (Pavel Stehule)
+
+
+
variables outputs psql variables+ and options shows command-line options.
+ \? commands is the default output. This help
+ information can also be output via --help=section.
+
+
+
+
+ Show tablespace size in
psql's \db++ (Fabrízio de Royes Mello)
+
+
+
+
+ Show data type owners in
psql's \dT++ (Magnus Hagander)
+
+
+
+
+ Allow
psql \watch to output+ \timing information (Fujii Masao)
+
+
+ Also prevent
+ \watch queries.
+
+
+
+
+ Allow
psql's \sf and \ef+ to honor ECHO_HIDDEN (Andrew Dunstan)
+
+
+
+
+ Improve
psql tab completion for \set,+ \unset, and :variable names (Pavel
+ Stehule)
+
+
+
+
+ Allow tab completion of
psql \c+ role names (Ian Barwick)
+
+
+
+
+
+
+
+
+
+
+
<xref linkend="APP-PGDUMP">
+
+
+
+
+ Allow
pg_dump to share a snapshot taken by another+ session using
+
+
+ The remote snapshot must have been exported by
+ pg_export_snapshot() or been defined as a
+ logical replication slot. This can be used by parallel
+
pg_dump to use a consistent snapshot across+
+
+
+
+ Always have
pg_dump print server and+
pg_dump versions (Jing Wang)+
+
+ Previously, version information was only printed in
+
+
+
+
+
+
+
+
+
+
<xref linkend="app-pg-ctl">
+
+
+
+
+ Change
pg_ctl default shutdown mode from+ smart to fast (Bruce Momjian)
+
+
+
+
+ Allow multiple
pg_ctl + be appended (Bruce Momjian)
+
+
+
+
+ Allow control of
pg_ctl's event source logging+ on MS Windows (MauMau)
+
+
+ This only controls
pg_ctl, not the server, which+ has separate settings in postgresql.conf.
+
+
+
+
+
+
+
+
+
<xref linkend="pgupgrade">
+
+
+
+
+ Move
pg_upgrade from contrib to+ src/bin (Peter Eisentraut)
+
+
+
+
+ Allow multiple
pg_upgrade+
+
+
+
+
+ Improve database collation comparisons in
+
pg_upgrade (Heikki Linnakangas)+
+
+
+
+ Document the use of
rsync for standby server+ upgrades using
pg_upgrade (Stephen Frost,+ Bruce Momjian)
+
+
+
+
+ Remove
pg_upgrade support for 8.3 old clusters+ (Bruce Momjian)
+
+
+
+
+
+
+
+
+
+
+
Source Code
+
+
+
+
+ Simplify
WAL record format (Heikki Linnakangas)+
+
+ This allows external tools to more easily process
WAL+ files.
+
+
+
+
+ Add basic atomics
API support (Andres Freund, Oskari+ Saarenmaa)
+
+
+
+
+ Add native compiler and memory barriers for
Solaris+ Studio (Oskari Saarenmaa)
+
+
+ IS THIS PART OF ATOMICS?
+
+
+
+
+ Allow custom path and scan methods (KaiGai Kohei, Tom Lane)
+
+
+ This allows extensions greater control over the optimizer and
+ executor.
+
+
+
+
+ Allow foreign data wrappers to do post-filter locking (Etsuro
+ Fujita)
+
+
+
+
+ Improve parallel execution infrastructure (Robert Haas, Amit
+ Kapila, Noah Misch, Rushabh Lathia, Jeevan Chalke)
+
+
+
+
+ Remove
Alpha (CPU) and
+ class="osname">Tru64 (OS) ports (Andres Freund)
+
+
+
+
+ Remove swap-byte-based spinlock implementation for
+
ARMv5 and earlier CPUs (Robert Haas)+
+
+
ARMv5's weak memory ordering made this locking+ implementation unsafe. Spinlock support is still possible on
+ newer gcc implementations with atomics support.
+
+
+
+
+ Generate an error when excessively long (100+ character) file
+ paths are written to tar files (Peter Eisentraut)
+
+
+ Tar does not support such overly-long paths.
+
+
+
+
+ Change columns pg_seclabel.provider
+ and pg_shseclabel.provider to
+ TEXT (Tom Lane)
+
+
+ This allows these columns to store 64+ characters.
+
+
+
+
+
+
+
MS Windows
+
+
+
+
+ Allow higher-precision timestamp resolution on
+ class="osname">Windows 8 or Windows
+ Server 2012 and later Windows systems (Craig Ringer)
+
+
+
+
+ Install shared libraries to
bin in
+ class="osname">MS Windows (Peter Eisentraut, Michael Paquier)
+
+
+
+
+ Install src/test/modules together with
+
contrib on MSVC builds (Michael+ Paquier)
+
+
+
+
+ Allow configure's
+ by the
MSVC build (Michael Paquier)+
+
+
+
+ Pass
PGFILEDESC into MSVC contrib builds+ (Michael Paquier)
+
+
+
+
+ Add icons to all
MSVC-built binaries (Noah Misch)+
+
+ MinGW already had such icons.
+
+
+
+
+ Add optional-argument support to the internal
+ getopt_long() implementation (Michael Paquier,
+ Andres Freund)
+
+
+ This is used by the
MSVC build.+
+
+
+
+
+
+
+
+
+
+
Additional Modules
+
+
+
+
+ Add
pg_rewind, which allows re-synchronizing a+ master server after failback (Heikki Linnakangas)
+
+
+
+
+ Add statistics for minimum, maximum, mean, and standard deviation
+ times to
pg_stat_statements (Mitsumasa Kondo,+ Andrew Dunstan)
+
+
+
+
+
pgp_armor_headers() to extract PGP+ armor headers (Marko Tiikkaja, Heikki Linnakangas)
+
+
+
+
+ Allow empty replacement strings in
unaccent+ (Mohammad Alhashash)
+
+
+ This is useful in languages where diacritic signs are represented
+ as separate characters.
+
+
+
+
+ Allow multi-character source strings in
unaccent+ (Tom Lane)
+
+
+ This could be useful in languages where diacritic signs are
+ represented as separate characters. It also allows more complex
+ unaccent dictionaries.
+
+
+
+
+ Add
contrib modules tsm_system_rows+ and
tsm_system_time to allow additional table+ sampling methods (Petr Jelinek)
+
+
+
+
+ Add
pg_xlogdump option + display summary statistics (Abhijit Menon-Sen)
+
+
+
+
+ Allow
GIN index inspection functions to+
pageinspect (Heikki Linnakangas, Peter Geoghegan,+ Michael Paquier)
+
+
+
+
+ Allow
pgstattuple to report approximate answers+ with less overhead using pgstattuple_approx()
+ (Abhijit Menon-Sen)
+
+
+
+
+ Move
pg_upgrade_support code into backend and+ remove the module (Peter Eisentraut)
+
+
+
+
+ Move
dummy_seclabel, test_shm_mq,+
test_parser, and worker_spi+ from contrib to src/test/modules
+ (Álvaro Herrera)
+
+
+
+
+
+
+
<xref linkend="pgbench">
+
+
+
+
+ Move pgbench from contrib to src/bin
+ (Peter Eisentraut)
+
+
+
+
+ Allow counting of pgbench transactions that take over a specified
+ amount of time (Fabien Coelho)
+
+
+ This is controlled by new
+
+
+
+
+ Allow pgbench to generate Gaussian/exponential distributions
+ using \setrandom (Kondo Mitsumasa, Fabien Coelho)
+
+
+
+
+ Add information about buffer pins to
pg_buffercache+ display (Andres Freund)
+
+
+
+
+ Allow
pgbench's \set command to handle+ multi-operator expressions (Robert Haas, Fabien Coelho)
+
+
+
+
+
+
+
+
+
+
+
+
The reason for splitting the release notes this way is so that appropriate
subsets can easily be copied into back branches.
-->
+&release-9.5;
&release-9.4;
&release-9.3;
&release-9.2;
projects / postgresql.git / commitdiff