Release 9.5Release Date2015-??-??Current as of 2015-08-03Overview
Major enhancements in PostgreSQL> 9.5 include:
... to be filled in ...
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)
The precedence of <=, >=
and <> has been reduced to match that of
<, >
and =. The precedence of IS> tests
(e.g., x> IS NULL>) has been reduced to be
just below these six comparison operators.
Also, multi-keyword operators beginning with NOT> now have
the precedence of their base operator (for example, NOT
BETWEEN> now has the same precedence as BETWEEN>) whereas
before they had inconsistent precedence, behaving like NOT>
with respect to their left operand but like their base operator with
respect to their right operand. The new configuration
parameter can be
enabled to warn about queries in which these precedence changes result
in different parsing choices.
Change pg_ctl>'s default shutdown mode from
smart> to fast> (Bruce Momjian)
Use assignment cast behavior for data type conversions
in PL/pgSQL> assignments, rather than converting to and
from text (Tom Lane)
This change causes conversions of booleans to strings to
produce true> or false>, not t>
or f>. Other type conversions may succeed in more cases
than before; for example, assigning a numeric value 3.9> to
an integer variable will now assign 4 rather than failing. If no
assignment-grade cast is defined for the particular source and
destination types, PL/pgSQL> will fall back to its old
I/O conversion behavior.
Allow characters in server
command-line options> to be escaped with a backslash (Andres Freund)
Formerly, spaces in the options string always separated options, so
there was no way to include a space in an option value. Including
a backslash in an option value now requires writing \\>.
Change the default value of include_realm>> to 1, so that
by default the realm is not removed from a GSS>
or SSPI> principal name (Stephen Frost)
Fix REASSIGN OWNED>>
and ALTER OWNER TO>>
to properly update permissions lists (ACLs) when changing ownership of
types, foreign data wrappers, and foreign servers (Bruce Momjian)
Remove server configuration
parameter ssl_renegotiation_limit>, which was deprecated
in earlier releases (Andres Freund)
While SSL renegotiation is a good idea in theory, it has caused enough
bugs to be considered a net negative in practice, and it is due to be
removed from future versions of the relevant standards. We have
therefore removed support for it from PostgreSQL>.
Remove server configuration parameter autocommit>, which
was already deprecated and non-operational (Tom Lane)
Remove pg_authid>>'s
rolcatupdate> field, as it had no value (Adam Brightwell)
Allow json> and jsonb> array extraction operators to
accept negative subscripts, which count from the end of JSON arrays.
Previously, these operators returned NULL> for negative
subscripts. (Peter Geoghegan, Andrew Dunstan)
Changes
Below you will find a detailed account of the changes between
PostgreSQL 9.5 and the previous major
release.
ServerIndexes
Add Block Range Indexes> (BRIN>)
(Álvaro Herrera)
BRIN> indexes are very compact and cheap to update by
storing 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 configuration parameter
to control the size of GIN> pending lists (Fujii Masao)
Previously the list size was controlled
by . 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
(Peter Geoghegan, Andrew Gierth, Robert Haas)
Extend the infrastructure that allows sorting to be performed by
inlined, non-SQL-callable comparison functions to
cover CREATE INDEX>, REINDEX>, and
CLUSTER> (Peter Geoghegan)
Improve in-memory hash performance (Tomas Vondra, Robert Haas)
Improve concurrency of shared buffer replacement
(Robert Haas, Amit Kapila)
Reduce the number of page locks and pins during index scans (Kevin Grittner)
The primary benefit of this is to allow index vacuums to be blocked
less often.
Make backend local tracking of buffer pins memory efficient (Andres Freund)
Previously each session allocated an array with space for every buffer
in shared_buffers>.
Improve lock scalability (Andres Freund)
This particularly addresses scalability problems when running on
systems with multiple CPU> sockets.
Allow the optimizer to remove unnecessary references to left
outer join subqueries (David Rowley)
Allow pushdown of query restrictions into window functions>, where appropriate
(David Rowley)
Allow non-LEAKPROOF functions to be passed into security barrier
views if the function does not reference any table columns
(Dean Rasheed)
Speed up CRC> (cyclic redundancy check) computations
and switch to CRC-32C (Abhijit Menon-Sen, Heikki Linnakangas)
Improve bitmap index scan performance (Teodor Sigaev, Tom Lane)
Speed up CREATE INDEX by avoiding unneccessary memory copies (Robert Haas)
Monitoring
Add per-table autovacuum logging control via
log_min_autovacuum_duration> (Michael Paquier)
NOT DOCUMENTED?
Add new configuration parameter
(Thomas Munro)
This string, typically set in postgresql.conf>>,
allows clients to identify the cluster. This name also appears
in the process title of all server processes, allowing for easier
identification of processes belonging to the same cluster.
Prevent non-superusers from changing on connection startup (Fujii Masao)
SSL>
Check Subject Alternative
Names>> in SSL> server certificates, if present
(Alexey Klyukin)
When they are present, this 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 call OpenSSL>
functions, PQsslAttribute()> returns SSL>
information in an SSL>-implementation-independent way.
(Future versions of libpq might support other SSL>
implementations.)
Make libpq> honor any OpenSSL>
thread callbacks (Jan Urbanski)
Previously they were overwritten.
Server Settings
Replace configuration parameter checkpoint_segments>
with
and (Heikki Linnakangas)
This allows the allocation of a large number of WAL> files
without keeping them if they are not needed. Thus the default
for has been increased
to 1GB>.
Add configuration parameter to
control compression of full page images stored in WAL>
(Rahila Syed, Michael Paquier)
Allow recording of transaction
commit timestamps when configuration parameter
is enabled (Álvaro Herrera, Petr Jelínek)
Timestamp information can be accessed using functions pg_xact_commit_timestamp()>>
and pg_last_committed_xact()>.
Allow to be set
by ALTER ROLE SET> (Peter Eisentraut, Kyotaro Horiguchi)
Allow running autovacuum workers>
to respond to configuration parameter changes (Michael Paquier)
Make configuration parameter
read-only (Andres Freund)
This means that assertions can no longer be turned
off if they were enabled at compile time, allowing for more
efficient code optimization. This change also removed the postgres>
Allow setting on
systems where it has no effect (Peter Eisentraut)
Add environment variables PG_OOM_ADJUST_FILE>>
and PG_OOM_ADJUST_VALUE>>
to help control the Linux OOM> killer (Gurjeet Singh)
The previous OOM> control infrastructure involved a
compile-time option.
Add system view pg_file_settings>>
to show the contents of the server's 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 command removes the setting from postgresql.auto.conf>.
Replication and Recovery
Add recovery.conf>>
parameter recovery_target_action>>
to control post-recovery activity (Petr Jelínek)
This replaces the old parameter pause_at_recovery_target>.
Add new value
always> to allow standbys to always archive received
WAL> files (Fujii Masao)
Add configuration
parameter 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 configuration parameter
to log replication commands (Fujii Masao)
By default, replication commands, e.g. IDENTIFY_SYSTEM>>,
are not logged, even when is set
to all>.
Allow labeling> of
the origin progress of logical replication changes (Andres Freund)
This is helpful when implementing replication solutions.
Report the processes 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 URI>s, e.g. postgres://>
(Alexander Shulgin)
Queries
Allow INSERTS>>
that would generate constraint conflicts to be turned into
UPDATE>s 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 to set multiple columns in
an UPDATE>> to the result of 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
Jelínek)
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)
Allow REINDEX> to reindex an entire schema using the
SCHEMA> option (Sawada Masahiko)
Add VERBOSE> option to REINDEX> (Sawada
Masahiko)
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 changing of the WAL
logging status of a table ater 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 some commands (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.
Add support for IMPORT FOREIGN
SCHEMA>> (Ronan Dunklau, Michael Paquier, Tom Lane)
This command allows automatic creation of local foreign tables
that match the structure of existing tables on a remote server.
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 constraints are assumed to be enforced on the remote server,
and are not enforced locally. However, they are assumed to hold for
purposes of query optimization, such
as constraint
exclusion>.
Allow foreign data wrappers and custom scans to implement join
pushdown (KaiGai Kohei)
Add a set-returning function pg_event_trigger_ddl_commands()>>, 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, potentially leading to
invalid XML>.
Allow MACADDR>> input
using the format xxxx-xxxx-xxxx> (Herwin Weststrate)
Tighten syntax 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)
JSON>
Add JSONB> functions jsonb_set()>>
and jsonb_pretty()>>
(Dmitry Dolgov, Andrew Dunstan, Petr Jelínek)
Add several generator functions for JSONB> that already
existed for JSON> (Andrew Dunstan)
These 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 a width_bucket()>>
variant that supports any sortable data type and non-uniform bucket
widths (Petr Jelínek)
Add an optional missing_ok> argument to pg_read_file()>>
and related functions (Michael Paquier, Heikki Linnakangas)
Allow =>>>
to specify named parameters in function calls (Pavel Stehule)
Previously only :=> could be used. This requires removing
the possibility for =>> to be a user-defined operator.
Creation of user-defined =>> operators has been issuing
warnings since Postgres 9.0.
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 OID>s that uniquely
identify an object, and function pg_identify_object_as_address()>>
to return object information based on OID>s (Álvaro
Herrera)
Loosen security checks for viewing queries in pg_stat_activity>>,
executing pg_cancel_backend()>>,
and executing pg_terminate_backend()>>
(Stephen Frost)
Now, role membership is sufficient; previously only the same
role could perform these operations.
Add pg_stat_get_snapshot_timestamp()>>
to output the timestamp of the statistics snapshot (Matt Kelly)
This represents the last time the snapshot files was written to
the file system.
Add mxid_age()>>
to compute multi-xid age (Bruce Momjian)
Add data types regrole> regnamespace>> that returns
the OID> of a role (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)
Allow specification of conversion routines between SQL>
data types and data types of procedural languages (Peter Eisentraut)
This change adds new commands CREATE>>/DROP TRANSFORM>>.
This also adds optional transformations between the hstore>> and ltree>> types to/from PL/Perl>> and PL/Python>>.
PL/pgSQL 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)
Add pg_rewind>>,
which allows re-synchronizing a master server after failback
(Heikki Linnakangas)
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
Without this, WAL> files are fsynced only on close.
Allow vacuumdb>> to
vacuum in parallel using
Add
Make pg_basebackup>>
use a tablespace mapping file when using tar> format,
to support symbolic links and file paths of 100+ characters in length
on MS Windows> (Amit Kapila)
Add pg_xlogdump>> option
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>> variables option
(%l>) to display the multi-line statement line number
(Sawada Masahiko)
Add psql> setting pager_min_lines>>
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
variable (Jeff Janes)
Currently only the first schema can be tab-completed.
Improve psql>'s tab completion for triggers and rules
(Andreas Karlsson)
Backslash Commands
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>'s \watch> to output
\timing> information (Fujii Masao)
Also prevent
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 role names
in psql> \c> commands (Ian Barwick)
Allow pg_dump> to share a snapshot taken by another
session using
The remote snapshot must have been exported by
pg_export_snapshot()> or logical replication slot
creation. This can be used by another pg_dump> to
use a share a consistent snapshot across pg_dump>
processes.
Always have pg_dump> print server and
pg_dump> versions (Jing Wang)
Previously, version information was only printed in
Remove the long-ignored
Allow multiple pg_ctl>
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>.
Move pg_upgrade> from contrib> to
src/bin> (Peter Eisentraut)
In connection with this change, the functionality previously
provided by the pg_upgrade_support> module has been
moved into the core server.
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 support for upgrading from 8.3 clusters (Bruce Momjian)
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)
Allow pgbench>'s \set> command to handle
multi-operator expressions (Robert Haas, Fabien Coelho)
Source Code
Simplify WAL>> record format
(Heikki Linnakangas)
This allows external tools to more easily track what blocks
are modified.
Add atomic memory operations API> (Andres Freund)
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)
Foreign tables can now take part in INSERT ... ON CONFLICT
DO NOTHING> queries (Peter Geoghegan, Heikki Linnakangas,
Andres Freund)
Foreign data wrappers must be modified to handle this.
INSERT ... ON CONFLICT DO UPDATE> is not supported on
foreign tables.
Improve hash_create()>'s API for selecting
simple-binary-key hash functions (Teodor Sigaev, Tom Lane)
Improve parallel execution infrastructure (Robert Haas, Amit
Kapila, Noah Misch, Rushabh Lathia, Jeevan Chalke)
Remove Alpha> (CPU>) and Tru64> (OS) ports (Andres Freund)
Remove swap-byte-based spinlock implementation for
ARM>v5 and earlier CPU>s (Robert Haas)
ARM>v5'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 index opclass for columns pg_seclabel>>.provider>
and pg_shseclabel>>.provider>
to be text_pattern_ops> (Tom Lane)
This avoids possible problems with these indexes when different
databases of a cluster have different default collations.
Change the spinlock primitives to function as compiler barriers
(Robert Haas)
MS Windows
Allow higher-precision timestamp resolution on Windows 8> or Windows
Server 2012> and later Windows systems (Craig Ringer)
Install shared libraries to bin> in MS Windows> (Peter Eisentraut, Michael Paquier)
Install src/test/modules> together with
contrib> on MSVC> builds (Michael
Paquier)
Allow configure's
Pass PGFILEDESC> into MSVC> contrib builds
(Michael Paquier)
Add icons to all MSVC>-built binaries and version
information to all MS Windows>
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 statistics for minimum, maximum,
mean, and standard deviation times to pg_stat_statements>>
(Mitsumasa Kondo, Andrew Dunstan)
Add pgcrypto>> function
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 Jelínek)
Add GIN>>
index inspection functions to pageinspect>> (Heikki
Linnakangas, Peter Geoghegan, Michael Paquier)
Add information about buffer pins to pg_buffercache>> display
(Andres Freund)
Allow pgstattuple>>
to report approximate answers with less overhead using
pgstattuple_approx()> (Abhijit Menon-Sen)
Move dummy_seclabel>, test_shm_mq>,
test_parser>, and worker_spi>
from contrib> to src/test/modules>
(Álvaro Herrera)
These modules are only meant for server testing, so they do not need
to be built or installed when packaging PostgreSQL>.