Release date: 2020-09-24
PostgreSQL 13 contains many new features and enhancements, including:
Space savings and performance gains from de-duplication of B-tree index entries
Improved performance for queries that use aggregates or partitioned tables
Better query planning when using extended statistics
Parallelized vacuuming of indexes
Incremental sorting
The above items and other new features of PostgreSQL 13 are explained in more detail in the sections below.
A dump/restore using pg_dumpall or use of pg_upgrade or logical replication is required for those wishing to migrate data from any previous release. See Section 18.6 for general information on migrating to new major releases.
Version 13 contains a number of changes that may affect compatibility with previous releases. Observe the following incompatibilities:
Change SIMILAR
TO ... ESCAPE NULL to return NULL
(Tom Lane)
§
This new behavior matches the SQL specification.
Previously a null ESCAPE value was taken to mean
using the default escape string (a backslash character). This also
applies to substring(. The previous
behavior has been retained in old views by keeping the original
function unchanged.
text
FROM pattern
ESCAPE text)
Make json[b]_to_tsvector()
fully check the spelling of its string option
(Dominik Czarnota)
§
Change the way non-default effective_io_concurrency values affect concurrency (Thomas Munro) §
Previously, this value was adjusted before setting the number of concurrent requests. The value is now used directly. Conversion of old values to new ones can be done using:
SELECT round(sum(OLDVALUE/ n::float)) AS newvalue FROM generate_series(1,OLDVALUE) s(n);
Prevent display of auxiliary processes in pg_stat_ssl and pg_stat_gssapi system views (Euler Taveira) §
Queries that join these views to pg_stat_activity and wish to see auxiliary processes will need to use left joins.
Rename various wait events to improve consistency (Fujii Masao, Tom Lane) § § § § §
Fix ALTER FOREIGN
TABLE ... RENAME COLUMN to return a more appropriate
command tag (Fujii Masao)
§
Previously it returned ALTER TABLE; now it returns
ALTER FOREIGN TABLE.
Fix ALTER
MATERIALIZED VIEW ... RENAME COLUMN to return a more
appropriate command tag (Fujii Masao)
§
Previously it returned ALTER TABLE; now it returns
ALTER MATERIALIZED VIEW.
Rename configuration parameter wal_keep_segments
to wal_keep_size (Fujii Masao)
§
This determines how much WAL to retain for standby servers.
It is specified in megabytes, rather than number of files as with
the old parameter. If you
previously used wal_keep_segments,
the following formula will give you an approximately equivalent setting:
wal_keep_size = wal_keep_segments * wal_segment_size (typically 16MB)
Remove support for defining operator classes using pre-PostgreSQL 8.0 syntax (Daniel Gustafsson) §
Remove support for defining foreign key constraints using pre-PostgreSQL 7.3 syntax (Daniel Gustafsson) §
Remove support for "opaque" pseudo-types used by pre-PostgreSQL 7.3 servers (Daniel Gustafsson) §
Remove support for upgrading unpackaged (pre-9.1) extensions (Tom Lane) §
The FROM option
of CREATE
EXTENSION is no longer supported. Any installations
still using unpackaged extensions should upgrade them to a packaged
version before updating to PostgreSQL 13.
Remove support for posixrules files in the
timezone database (Tom Lane)
§
IANA's timezone group has deprecated this feature, meaning that it
will gradually disappear from systems' timezone databases over the
next few years. Rather than have a behavioral change appear
unexpectedly with a timezone data update, we have
removed PostgreSQL's support for this
feature as of version 13. This affects only the behavior
of POSIX-style time
zone specifications that lack an explicit daylight savings
transition rule; formerly the transition rule could be determined
by installing a custom posixrules file, but
now it is hard-wired. The recommended fix for any affected
installations is to start using a geographical time zone name.
In ltree, when an lquery pattern
contains adjacent asterisks with braces,
e.g., *{2}.*{3}, properly interpret that
as *{5} (Nikita Glukhov)
§
Fix pageinspect's bt_metap()
to return more appropriate data types that are less likely to overflow
(Peter Geoghegan)
§
Below you will find a detailed account of the changes between PostgreSQL 13 and the previous major release.
Allow pruning of partitions to happen in more cases (Yuzuko Hosoya, Amit Langote, Álvaro Herrera) § §
Allow partitionwise joins to happen in more cases (Ashutosh Bapat, Etsuro Fujita, Amit Langote, Tom Lane) § §
For example, partitionwise joins can now happen between partitioned tables even when their partition bounds do not match exactly.
Support row-level BEFORE triggers on partitioned tables (Álvaro
Herrera)
§
However, such a trigger is not allowed to change which partition is the destination.
Allow partitioned tables to be logically replicated via publications (Amit Langote) § §
Previously, partitions had to be replicated individually. Now a
partitioned table can be published explicitly, causing all its
partitions to be published automatically. Addition/removal of a
partition causes it to be likewise added to or removed from the
publication.
The CREATE
PUBLICATION option
publish_via_partition_root controls whether changes
to partitions are published as their own changes or their parent's.
Allow logical replication into partitioned tables on subscribers (Amit Langote) §
Previously, subscribers could only receive rows into non-partitioned tables.
Allow whole-row variables (that
is, table.*) to be
used in partitioning expressions (Amit Langote)
§
More efficiently store duplicates in B-tree indexes (Anastasia Lubennikova, Peter Geoghegan) §
This allows efficient B-tree indexing of low-cardinality columns
by storing duplicate keys only once. Users upgrading with pg_upgrade
will need to use REINDEX to make an
existing index use this feature.
Allow GiST and SP-GiST indexes on box
columns to support ORDER BY queries (Nikita
Glukhov)
§
§
box
<-> point
Allow GIN indexes to
more efficiently handle ! (NOT) clauses
in tsquery searches (Nikita
Glukhov, Alexander Korotkov, Tom Lane, Julien Rouhaud)
§
Allow index operator classes to take parameters (Nikita Glukhov) §
Allow CREATE INDEX to specify the GiST signature
length and maximum number of integer ranges (Nikita Glukhov)
§
Indexes created on four and eight-byte integer array, tsvector, pg_trgm, ltree, and hstore columns can now control these GiST index parameters, rather than using the defaults.
Prevent indexes that use non-default collations from being added as a table's unique or primary key constraint (Tom Lane) §
The index's collation must match that of the underlying column,
but ALTER TABLE previously failed to check
this.
Improve the optimizer's selectivity estimation for containment/match operators (Tom Lane) §
Allow setting the statistics target for extended statistics (Tomas Vondra) §
This is controlled with the new command option ALTER
STATISTICS ... SET STATISTICS. Previously this was computed
based on more general statistics target settings.
Allow use of multiple extended statistics objects in a single query (Tomas Vondra) § §
Allow use of extended statistics objects for OR clauses and IN/ANY constant
lists (Pierre Ducroquet, Tomas Vondra)
§
§
§
Allow functions in FROM clauses to be pulled up
(inlined) if they evaluate to constants (Alexander Kuzmenkov,
Aleksandr Parfenov)
§
§
Implement incremental sorting (James Coleman, Alexander Korotkov, Tomas Vondra) § §
If an intermediate query result is known to be sorted by one or more leading keys of a required sort ordering, the additional sorting can be done considering only the remaining keys, if the rows are sorted in batches that have equal leading keys.
If necessary, this can be controlled using enable_incremental_sort.
Improve the performance of sorting inet values (Brandur Leach) §
Allow hash aggregation to use disk storage for large aggregation result sets (Jeff Davis) § § §
Previously, hash aggregation was avoided if it was expected to use
more than work_mem memory. Now, a hash
aggregation plan can be chosen despite that. The hash table will
be spilled to disk if it exceeds work_mem times
hash_mem_multiplier.
This behavior is normally preferable to the old behavior, in which
once hash aggregation had been chosen, the hash table would be
kept in memory no matter how large it got -- which could be
very large if the planner had misestimated. If necessary,
behavior similar to that can be obtained by
increasing hash_mem_multiplier.
Allow inserts, not only updates and deletes, to trigger vacuuming activity in autovacuum (Laurenz Albe, Darafei Praliaskouski) §
Previously, insert-only activity would trigger auto-analyze but not auto-vacuum, on the grounds that there could not be any dead tuples to remove. However, a vacuum scan has other useful side-effects such as setting page-all-visible bits, which improves the efficiency of index-only scans. Also, allowing an insert-only table to receive periodic vacuuming helps to spread out the work of « freezing » old tuples, so that there is not suddenly a large amount of freezing work to do when the entire table reaches the anti-wraparound threshold all at once.
If necessary, this behavior can be adjusted with the new parameters autovacuum_vacuum_insert_threshold and autovacuum_vacuum_insert_scale_factor, or the equivalent table storage options.
Add maintenance_io_concurrency parameter to control I/O concurrency for maintenance operations (Thomas Munro) §
Allow WAL writes to be skipped during a transaction
that creates or rewrites a relation, if wal_level is minimal (Kyotaro
Horiguchi)
§
Relations larger than wal_skip_threshold
will have their files fsync'ed rather than generating
WAL. Previously this was done only for
COPY operations, but the implementation had a bug
that could cause data loss during crash recovery.
Improve performance when replaying DROP DATABASE
commands when many tablespaces are in use (Fujii Masao)
§
Improve performance for truncation of very large relations (Kirk Jamison) §
Improve retrieval of the leading bytes of TOAST'ed values (Binguo Bao, Andrey Borodin) §
Previously, compressed out-of-line TOAST values were fully fetched even when it's known that only some leading bytes are needed. Now, only enough data to produce the result is fetched.
Improve performance of LISTEN/NOTIFY
(Martijn van Oosterhout, Tom Lane)
§
§
§
Speed up conversions of integers to text (David Fetter) §
Reduce memory usage for query strings and extension scripts that contain many SQL statements (Amit Langote) §
Allow EXPLAIN,
auto_explain, autovacuum, and pg_stat_statements to track WAL usage
statistics (Kirill Bychik, Julien Rouhaud)
§
§
§
Allow a sample of SQL statements, rather than all statements, to be logged (Adrien Nayrat) §
A log_statement_sample_rate fraction of those statements taking more than log_min_duration_sample duration will be logged.
Add the backend type to csvlog and optionally log_line_prefix log output (Peter Eisentraut) §
Improve control of prepared statement parameter logging (Alexey Bashtanov, Álvaro Herrera) § §
The GUC setting log_parameter_max_length controls the maximum length of parameter values output during logging of non-error statements, while log_parameter_max_length_on_error does the same for logging of statements with errors. Previously, prepared statement parameters were never logged during errors.
Allow function call backtraces to be logged after errors (Peter Eisentraut, Álvaro Herrera) § §
The new parameter backtrace_functions specifies which C functions should generate backtraces on error.
Make vacuum buffer counters 64-bits wide to avoid overflow (Álvaro Herrera) §
Add leader_pid to pg_stat_activity to report a parallel worker's
leader process (Julien Rouhaud)
§
Add system view pg_stat_progress_basebackup
to report the progress of streaming base backups (Fujii Masao)
§
Add system view pg_stat_progress_analyze
to report ANALYZE progress
(Álvaro Herrera, Tatsuro Yamada, Vinayak Pokale)
§
Add system view pg_shmem_allocations
to display shared memory usage (Andres Freund, Robert Haas)
§
Add system view pg_stat_slru
to monitor internal SLRU caches
(Tomas Vondra)
§
Allow track_activity_query_size to be set as high as 1MB (Vyacheslav Makarov) §
The previous maximum was 100kB.
Report a wait event while creating a DSM segment
with posix_fallocate() (Thomas Munro)
§
Add wait event VacuumDelay to report on cost-based vacuum delay (Justin Pryzby) §
Add wait events for WAL archive and recovery pause (Fujii Masao) §
The new events are BackupWaitWalArchive and RecoveryPause.
Add wait events RecoveryConflictSnapshot and RecoveryConflictTablespace to monitor recovery conflicts (Masahiko Sawada) §
Improve performance of wait events on BSD-based systems (Thomas Munro) §
Allow only superusers to view the ssl_passphrase_command setting (Insung Moon) §
This was changed as a security precaution.
Change the server's default minimum TLS version for encrypted connections from 1.0 to 1.2 (Peter Eisentraut) §
This choice can be controlled by ssl_min_protocol_version.
Tighten rules on which utility commands are allowed in read-only transaction mode (Robert Haas) §
This change also increases the number of utility commands that can run in parallel queries.
Allow allow_system_table_mods to be changed after server start (Peter Eisentraut) §
Disallow non-superusers from modifying system tables when allow_system_table_mods is set (Peter Eisentraut) §
Previously, if allow_system_table_mods
was set at server start, non-superusers could issue
INSERT/UPDATE/DELETE
commands on system tables.
Enable support for Unix-domain sockets on Windows (Peter Eisentraut) §
Allow streaming replication configuration settings to be changed by reload (Sergei Kornilov) §
Previously, a server restart was required to change primary_conninfo and primary_slot_name.
Allow WAL receivers to use a temporary replication slot when a permanent one is not specified (Peter Eisentraut, Sergei Kornilov) § §
This behavior can be enabled using wal_receiver_create_temp_slot.
Allow WAL storage for replication slots to be limited by max_slot_wal_keep_size (Kyotaro Horiguchi) §
Replication slots that would require exceeding this value are marked invalid.
Allow standby promotion to cancel any requested pause (Fujii Masao) §
Previously, promotion could not happen while the standby was in paused state.
Generate an error if recovery does not reach the specified recovery target (Leif Gunnar Erlandsen, Peter Eisentraut) §
Previously, a standby would promote itself upon reaching the end of WAL, even if the target was not reached.
Allow control over how much memory is used by logical decoding before it is spilled to disk (Tomas Vondra, Dilip Kumar, Amit Kapila) §
This is controlled by logical_decoding_work_mem.
Allow recovery to continue even if invalid pages are referenced by WAL (Fujii Masao) §
This is enabled using ignore_invalid_pages.
Allow VACUUM
to process a table's indexes in parallel (Masahiko Sawada, Amit Kapila)
§
The new PARALLEL option controls this.
Allow FETCH FIRST
to use WITH TIES to return any additional rows
that match the last result row (Surafel Temesgen)
§
Report planning-time buffer usage in EXPLAIN's
BUFFER output (Julien Rouhaud)
§
Make CREATE TABLE
LIKE propagate a CHECK
constraint's NO INHERIT property to the created
table (Ildar Musin, Chris Travers)
§
When using LOCK
TABLE on a partitioned table, do not check permissions
on the child tables (Amit Langote)
§
Allow OVERRIDING USER
VALUE on inserts into identity columns (Dean Rasheed)
§
Add ALTER
TABLE ... DROP EXPRESSION
to allow removing the GENERATED
property from a column (Peter Eisentraut)
§
Fix bugs in multi-step ALTER TABLE commands (Tom
Lane)
§
IF NOT EXISTS clauses now work as expected, in
that derived actions (such as index creation) do not execute if the
column already exists. Also, certain cases of combining related
actions into one ALTER TABLE now work when they
did not before.
Add ALTER VIEW
syntax to rename view columns (Fujii Masao)
§
Renaming view columns was already possible, but one had to
write ALTER TABLE RENAME COLUMN, which is
confusing.
Add ALTER TYPE
options to modify a base type's TOAST properties
and support functions (Tomas Vondra, Tom Lane)
§
Add CREATE
DATABASE LOCALE option (Peter
Eisentraut)
§
This combines the existing options LC_COLLATE and
LC_CTYPE into a single option.
Allow DROP
DATABASE to disconnect sessions using the target
database, allowing the drop to succeed (Pavel Stehule, Amit Kapila)
§
This is enabled by the FORCE option.
Add structure member tg_updatedcols
to allow C-language update triggers to know which column(s) were updated
(Peter Eisentraut)
§
Add polymorphic data types for use by functions requiring compatible arguments (Pavel Stehule) §
The new data types are anycompatible,
anycompatiblearray, anycompatiblenonarray,
and anycompatiblerange.
Add SQL data type xid8 to expose
FullTransactionId (Thomas Munro)
§
The existing xid data type is only four bytes so it
does not provide the transaction epoch.
Add data
type regcollation
and associated functions, to represent OIDs of collation objects
(Julien Rouhaud)
§
Use the glibc version in some cases as a collation version identifier (Thomas Munro) §
If the glibc version changes, a warning will be issued about possible corruption of collation-dependent indexes.
Add support for collation versions on Windows (Thomas Munro) §
Allow ROW
expressions to have their members extracted with suffix
notation (Tom Lane)
§
For example, (ROW(4, 5.0)).f1 now returns 4.
Add alternate version of jsonb_set()
with improved NULL handling (Andrew Dunstan)
§
The new function, jsonb_set_lax(), handles a
NULL new value by either setting the specified
key to a JSON null, deleting the key, raising an
exception, or returning the jsonb value unmodified, as
requested.
Add jsonpath .datetime()
method (Nikita Glukhov, Teodor Sigaev, Oleg Bartunov, Alexander
Korotkov)
§
This function allows JSON values to be converted
to timestamps, which can then be processed in jsonpath
expressions. This change also adds jsonpath functions
that support time-zone-aware output.
Add SQL functions NORMALIZE()
to normalize Unicode strings, and IS
NORMALIZED to check for normalization (Peter
Eisentraut)
§
Add min() and
max() aggregates for pg_lsn (Fabrízio
de Royes Mello)
§
These are particularly useful in monitoring queries.
Allow Unicode
escapes,
e.g., E'\u
or nnnn'U&'\, to
specify any character available in the database encoding, even when
the database encoding is not UTF-8 (Tom Lane)
§
nnnn'
Allow to_date()
and to_timestamp() to recognize non-English
month/day names (Juan José Santamaría Flecha, Tom Lane)
§
The names recognized are the same as those output by to_char()
with the same format patterns.
Add datetime format patterns FF1
– FF6 to specify input or output of
1 to 6 fractional-second digits (Alexander
Korotkov, Nikita Glukhov, Teodor Sigaev, Oleg Bartunov)
§
These patterns can be used by to_char(),
to_timestamp(), and jsonpath's
.datetime().
Add SSSSS datetime format pattern as an
SQL-standard alias for SSSS
(Nikita Glukhov, Alexander Korotkov)
§
Add function gen_random_uuid()
to generate version-4 UUIDs (Peter Eisentraut)
§
Previously UUID generation functions were only available in the external modules uuid-ossp and pgcrypto.
Add greatest-common-denominator
(gcd)
and least-common-multiple (lcm) functions (Vik
Fearing)
§
Improve the performance and accuracy of the numeric
type's square root
(sqrt) and natural log
(ln) functions (Dean Rasheed)
§
§
Add function min_scale()
that returns the number of digits to the right of the decimal point
that are required to represent a numeric value with
full accuracy (Pavel Stehule)
§
Add function trim_scale()
to reduce the scale of a numeric value by removing
trailing zeros (Pavel Stehule)
§
Add commutators of distance operators (Nikita Glukhov) §
For example, previously only point
<-> line was supported,
now line <-> point
works too.
Create xid8 versions of all transaction ID functions
(Thomas Munro)
§
The old xid-based functions still exist, for backward
compatibility.
Allow get_bit()
and set_bit() to set bits beyond the first
256MB of a bytea value (Movead Li)
§
Allow advisory-lock functions to be used in some parallel operations (Tom Lane) §
Add the ability to remove an object's dependency on an extension (Álvaro Herrera) §
The object can be a function, materialized view, index, or trigger.
The syntax is ALTER .. NO DEPENDS ON.
Allow libpq clients to require channel binding for encrypted connections (Jeff Davis) §
Using the libpq connection parameter channel_binding
forces the other end of the TLS connection to prove
it knows the user's password. This prevents man-in-the-middle attacks.
Add libpq connection parameters to control the minimum and maximum TLS version allowed for an encrypted connection (Daniel Gustafsson) § § §
The settings are ssl_min_protocol_version and ssl_max_protocol_version. By default, the minimum TLS version is 1.2 (this represents a behavioral change from previous releases).
Allow use of passwords to unlock client certificates (Craig Ringer, Andrew Dunstan) §
This is enabled by libpq's sslpassword connection parameter.
Allow libpq to use DER-encoded client certificates (Craig Ringer, Andrew Dunstan) §
Fix ecpg's EXEC SQL
elif directive to work correctly (Tom Lane)
§
Previously it behaved the same as endif followed
by ifdef, so that a successful previous branch
of the same if construct did not prevent
expansion of the elif branch or following
branches.
Add transaction status (%x)
to psql's default
prompts (Vik Fearing)
§
Allow the secondary psql prompt to be blank but the same width as the primary prompt (Thomas Munro) §
This is accomplished by setting PROMPT2
to %w.
Allow psql's
\g
and \gx commands to
change \pset output
options for the duration of that single command (Tom Lane)
§
This feature allows syntax like \g (expand=on),
which is equivalent to \gx.
Add psql commands to display operator classes and operator families (Sergey Cherkashin, Nikita Glukhov, Alexander Korotkov) §
The new commands are \dAc,
\dAf, \dAo,
and \dAp.
Show table persistence in psql's \dt+
and related commands (David Fetter)
§
In verbose mode, the table/index/view shows if the object is permanent, temporary, or unlogged.
Improve output of psql's \d
for TOAST tables (Justin Pryzby)
§
Fix redisplay after psql's \e
command (Tom Lane)
§
When exiting the editor, if the query doesn't end with a semicolon
or \g, the query buffer contents will now be
displayed.
Add \warn
command to psql (David Fetter)
§
This is like \echo except that the text is sent
to stderr instead of stdout.
Add the PostgreSQL home page to command-line
--help output (Peter Eisentraut)
§
Allow pgbench to partition its « accounts » table (Fabien Coelho) §
This allows performance testing of partitioning.
Add pgbench command \aset, which behaves
like \gset, but for multiple queries (Fabien
Coelho)
§
Allow pgbench to generate its initial data server-side, rather than client-side (Fabien Coelho) §
Allow pgbench to show script contents using option
--show-script (Fabien Coelho)
§
Generate backup manifests for base backups, and verify them (Robert Haas) § §
A new tool pg_verifybackup can verify backups.
Have pg_basebackup estimate the total backup size by default (Fujii Masao) §
This computation allows pg_stat_progress_basebackup
to show progress. If that is not needed, it can be disabled by
using the --no-estimate-size option. Previously,
this computation happened only if the --progress
option was used.
Add an option to pg_rewind to configure standbys (Paul Guo, Jimmy Yih, Ashwin Agrawal) §
This matches pg_basebackup's
--write-recovery-conf option.
Allow pg_rewind to use the target cluster's restore_command to retrieve needed WAL (Alexey Kondratov) §
This is enabled using the
-c/--restore-target-wal option.
Have pg_rewind automatically run crash recovery before rewinding (Paul Guo, Jimmy Yih, Ashwin Agrawal) §
This can be disabled by using --no-ensure-shutdown.
Increase the PREPARE
TRANSACTION-related information reported by
pg_waldump (Fujii Masao)
§
Add pg_waldump
option --quiet to suppress non-error output (Andres
Freund, Robert Haas)
§
Add pg_dump
option --include-foreign-data to dump data from
foreign servers (Luis Carril)
§
Allow vacuum commands run by vacuumdb to operate in parallel mode (Masahiko Sawada) §
This is enabled with the new --parallel option.
Allow reindexdb to operate in parallel (Julien Rouhaud) §
Parallel mode is enabled with the new --jobs option.
Allow dropdb to disconnect sessions using the target database, allowing the drop to succeed (Pavel Stehule) §
This is enabled with the -f option.
Remove --adduser and --no-adduser
from createuser (Alexander
Lakhin)
§
The long-supported preferred options for this are called
--superuser and --no-superuser.
Use the directory of the pg_upgrade
program as the default --new-bindir setting when
running pg_upgrade (Daniel Gustafsson)
§
Add a glossary to the documentation (Corey Huinker, Jürgen Purtz, Roger Harkavy, Álvaro Herrera) §
Reformat tables containing function and operator information for better clarity (Tom Lane) §
Upgrade to use DocBook 4.5 (Peter Eisentraut) §
Add support for building on Visual Studio 2019 (Haribabu Kommi) §
Add build support for MSYS2 (Peter Eisentraut) §
Add compare_exchange and fetch_add assembly language code for Power PC compilers (Noah Misch) §
Update Snowball stemmer dictionaries used by full text search (Panagiotis Mavrogiorgos) §
This adds Greek stemming and improves Danish and French stemming.
Remove support for Windows 2000 (Michael Paquier) §
Remove support for non-ELF BSD systems (Peter Eisentraut) §
Remove support for Python versions 2.5.X and earlier (Peter Eisentraut) §
Remove support for OpenSSL 0.9.8 and 1.0.0 (Michael Paquier) §
Remove configure options
--disable-float8-byval
and --disable-float4-byval (Peter Eisentraut)
§
§
These were needed for compatibility with some version-zero C functions, but those are no longer supported.
Pass the query string to planner hook functions (Pascal Legrand, Julien Rouhaud) §
Add TLS init hook (Andrew Dunstan) §
Allow building with no predefined Unix-domain socket directory (Peter Eisentraut) §
Reduce the probability of SysV resource key collision on Unix platforms (Tom Lane) §
Use operating system functions to reliably erase memory that contains sensitive information (Peter Eisentraut) §
For example, this is used for clearing passwords stored in memory.
Add headerscheck script to test C header-file
compatibility (Tom Lane)
§
Implement internal lists as arrays, rather than a chain of cells (Tom Lane) §
This improves performance for queries that access many objects.
Change the API for TS_execute() (Tom Lane,
Pavel Borisov)
§
§
TS_execute callbacks must now provide ternary
(yes/no/maybe) logic. Calculating NOT queries accurately is now
the default.
Allow extensions to be specified as trusted (Tom Lane) §
Such extensions can be installed in a database by users with
database-level CREATE privileges, even if they
are not superusers. This change also removes
the pg_pltemplate system catalog.
Allow non-superusers to connect to postgres_fdw foreign servers without using a password (Craig Ringer) §
Specifically, allow a superuser to set
password_required to false for
a user mapping. Care
must still be taken to prevent non-superusers from using superuser
credentials to connect to the foreign server.
Allow postgres_fdw to use certificate authentication (Craig Ringer) §
Different users can use different certificates.
Allow sepgsql to control access to the
TRUNCATE command (Yuli Khodorkovskiy)
§
Add extension bool_plperl which transforms SQL booleans to/from PL/Perl booleans (Ivan Panchenko) §
Have pg_stat_statements treat SELECT
... FOR UPDATE commands as distinct from those
without FOR UPDATE (Andrew Gierth, Vik Fearing)
§
Allow pg_stat_statements to optionally track the planning time of statements (Julien Rouhaud, Pascal Legrand, Thomas Munro, Fujii Masao) § §
Previously only execution time was tracked.
Overhaul ltree's lquery syntax to treat
NOT (!) more logically (Filip Rembialkowski,
Tom Lane, Nikita Glukhov)
§
§
Also allow non-* queries to use a numeric range ({}) of matches.
Add support for binary I/O of ltree, lquery, and ltxtquery types (Nino Floris) §
Add an option to dict_int to ignore the sign of integers (Jeff Janes) §
Add adminpack function
pg_file_sync() to allow fsync'ing a file
(Fujii Masao)
§
Add pageinspect functions to output
t_infomask/t_infomask2
values in human-readable format (Craig Ringer, Sawada Masahiko,
Michael Paquier)
§
§
Add B-tree index de-duplication processing columns to pageinspect output (Peter Geoghegan) §
The following individuals (in alphabetical order) have contributed to this release as patch authors, committers, reviewers, testers, or reporters of issues.
| Abhijit Menon-Sen |
| Adam Lee |
| Adam Scott |
| Adé Heyward |
| Adrien Nayrat |
| Ahsan Hadi |
| Alastair McKinley |
| Aleksandr Parfenov |
| Alex Aktsipetrov |
| Alex Macy |
| Alex Shulgin |
| Alexander Korotkov |
| Alexander Kukushkin |
| Alexander Kuzmenkov |
| Alexander Lakhin |
| Alexey Bashtanov |
| Alexey Kondratov |
| Álvaro Herrera |
| Amit Kapila |
| Amit Khandekar |
| Amit Langote |
| Amul Sul |
| Anastasia Lubennikova |
| Andreas Joseph Krogh |
| Andreas Karlsson |
| Andreas Kunert |
| Andreas Seltenreich |
| Andrei Zubkov |
| Andres Freund |
| Andrew Bille |
| Andrew Dunstan |
| Andrew Gierth |
| Andrey Borodin |
| Andrey Klychkov |
| Andrey Lepikhov |
| Anna Akenteva |
| Anna Endo |
| Anthony Nowocien |
| Anton Vlasov |
| Antonin Houska |
| Ants Aasma |
| Arne Roland |
| Arnold Müller |
| Arseny Sher |
| Arthur Nascimento |
| Arthur Zakirov |
| Ashutosh Bapat |
| Ashutosh Sharma |
| Ashwin Agrawal |
| Asif Rehman |
| Asim Praveen |
| Atsushi Torikoshi |
| Augustinas Jokubauskas |
| Austin Drenski |
| Basil Bourque |
| Beena Emerson |
| Ben Cornett |
| Benjie Gillam |
| Benoît Lobréau |
| Bernd Helmle |
| Bharath Rupireddy |
| Bhargav Kamineni |
| Binguo Bao |
| Brad DeJong |
| Brandur Leach |
| Brent Bates |
| Brian Williams |
| Bruce Momjian |
| Cameron Ezell |
| Cary Huang |
| Chapman Flack |
| Charles Offenbacher |
| Chen Huajun |
| Chenyang Lu |
| Chris Bandy |
| Chris Travers |
| Christoph Berg |
| Christophe Courtois |
| Corey Huinker |
| Craig Ringer |
| Cuiping Lin |
| Dagfinn Ilmari Mannsåker |
| Daniel Fiori |
| Daniel Gustafsson |
| Daniel Vérité |
| Daniel Westermann |
| Darafei Praliaskouski |
| Daryl Waycott |
| Dave Cramer |
| David Christensen |
| David Fetter |
| David G. Johnston |
| David Gilman |
| David Harper |
| David Rowley |
| David Steele |
| David Zhang |
| Davinder Singh |
| Dean Rasheed |
| Denis Stuchalin |
| Dent John |
| Didier Gautheron |
| Dilip Kumar |
| Dmitry Belyavsky |
| Dmitry Dolgov |
| Dmitry Ivanov |
| Dmitry Telpt |
| Dmitry Uspenskiy |
| Dominik Czarnota |
| Dongming Liu |
| Ed Morley |
| Edmund Horner |
| Emre Hasegeli |
| Eric Gillum |
| Erik Rijkers |
| Erwin Brandstetter |
| Ethan Waldo |
| Etsuro Fujita |
| Eugen Konkov |
| Euler Taveira |
| Fabien Coelho |
| Fabrízio de Royes Mello |
| Felix Lechner |
| Filip Janus |
| Filip Rembialkowski |
| Frank Gagnepain |
| Georgios Kokolatos |
| Gilles Darold |
| Greg Nancarrow |
| Grigory Smolkin |
| Guancheng Luo |
| Guillaume Lelarge |
| Hadi Moshayedi |
| Haiying Tang |
| Hamid Akhtar |
| Hans Buschmann |
| Hao Wu |
| Haribabu Kommi |
| Haruka Takatsuka |
| Heath Lord |
| Heikki Linnakangas |
| Himanshu Upadhyaya |
| Hironobu Suzuki |
| Hugh McMaster |
| Hugh Ranalli |
| Hugh Wang |
| Ian Barwick |
| Ibrar Ahmed |
| Ildar Musin |
| Insung Moon |
| Ireneusz Pluta |
| Isaac Morland |
| Ivan Kartyshov |
| Ivan Panchenko |
| Ivan Sergio Borgonovo |
| Jaime Casanova |
| James Coleman |
| James Gray |
| James Hunter |
| James Inform |
| James Lucas |
| Jan Mussler |
| Jaroslav Sivy |
| Jeevan Chalke |
| Jeevan Ladhe |
| Jeff Davis |
| Jeff Janes |
| Jehan-Guillaume de Rorthais |
| Jeremy Evans |
| Jeremy Schneider |
| Jeremy Smith |
| Jerry Sievers |
| Jesper Pedersen |
| Jesse Kinkead |
| Jesse Zhang |
| Jian Zhang |
| Jie Zhang |
| Jim Nasby |
| Jimmy Yih |
| Jobin Augustine |
| Joe Conway |
| John Hsu |
| John Naylor |
| Jon Jensen |
| Jonathan Katz |
| Jorge Gustavo Rocha |
| Josef Šimánek |
| Joseph Nahmias |
| Juan José Santamaría Flecha |
| Julian Backes |
| Julien Rouhaud |
| Jürgen Purtz |
| Justin King |
| Justin Pryzby |
| Karl O. Pinc |
| Keisuke Kuroda |
| Keith Fiske |
| Kelly Min |
| Ken Tanzer |
| Kirill Bychik |
| Kirk Jamison |
| Konstantin Knizhnik |
| Kuntal Ghosh |
| Kyle Kingsbury |
| Kyotaro Horiguchi |
| Lars Kanis |
| Laurenz Albe |
| Leif Gunnar Erlandsen |
| Li Japin |
| Liudmila Mantrova |
| Lucas Viecelli |
| Luis M. Carril |
| Lukáš Sobotka |
| Maciek Sakrejda |
| Magnus Hagander |
| Mahadevan Ramachandran |
| Mahendra Singh Thalor |
| Manuel Rigger |
| Marc Munro |
| Marcos David |
| Marina Polyakova |
| Mark Dilger |
| Mark Wong |
| Marko Tiikkaja |
| Markus Winand |
| Marti Raudsepp |
| Martijn van Oosterhout |
| Masahiko Sawada |
| Masahiro Ikeda |
| Masao Fujii |
| Mateusz Guzik |
| Matt Jibson |
| Matteo Beccati |
| Maxence Ahlouche |
| Melanie Plageman |
| Michael Banck |
| Michael Luo |
| Michael Meskes |
| Michael Paquier |
| Michail Nikolaev |
| Mike Palmiotto |
| Mithun Cy |
| Movead Li |
| Nathan Bossart |
| Nazli Ugur Koyluoglu |
| Neha Sharma |
| Nicola Contu |
| Nicolás Alvarez |
| Nikhil Sontakke |
| Nikita Glukhov |
| Nikolay Shaplov |
| Nino Floris |
| Noah Misch |
| Noriyoshi Shinoda |
| Oleg Bartunov |
| Oleg Samoilov |
| Oleksii Kliukin |
| Ondrej Jirman |
| Panagiotis Mavrogiorgos |
| Pascal Legrand |
| Patrick McHardy |
| Paul Guo |
| Paul Jungwirth |
| Paul Ramsey |
| Paul Sivash |
| Paul Spencer |
| Pavan Deolasee |
| Pavel Borisov |
| Pavel Luzanov |
| Pavel Stehule |
| Pavel Suderevsky |
| Peifeng Qiu |
| Pengzhou Tang |
| Peter Billen |
| Peter Eisentraut |
| Peter Geoghegan |
| Peter Smith |
| Petr Fedorov |
| Petr Jelínek |
| Phil Bayer |
| Philip Semanchuk |
| Philippe Beaudoin |
| Pierre Ducroquet |
| Pierre Giraud |
| Piotr Gabriel Kosinski |
| Piotr Wlodarczyk |
| Prabhat Sahu |
| Quan Zongliang |
| Quentin Rameau |
| Rafael Castro |
| Rafia Sabih |
| Raj Mohite |
| Rajkumar Raghuwanshi |
| Ramanarayana M |
| Ranier Vilela |
| Rares Salcudean |
| Raúl Marín Rodríguez |
| Raymond Martin |
| Reijo Suhonen |
| Richard Guo |
| Robert Ford |
| Robert Haas |
| Robert Kahlert |
| Robert Treat |
| Robin Abbi |
| Robins Tharakan |
| Roger Harkavy |
| Roman Peshkurov |
| Rui DeSousa |
| Rui Hai Jiang |
| Rushabh Lathia |
| Ryan Lambert |
| Ryohei Takahashi |
| Scott Ribe |
| Sean Farrell |
| Sehrope Sarkuni |
| Sergei Agalakov |
| Sergei Kornilov |
| Sergey Cherkashin |
| Shawn Debnath |
| Shawn Wang |
| Shay Rojansky |
| Shenhao Wang |
| Simon Riggs |
| Slawomir Chodnicki |
| Soumyadeep Chakraborty |
| Stéphane Lorek |
| Stephen Frost |
| Steve Rogerson |
| Steven Winfield |
| Surafel Temesgen |
| Suraj Kharage |
| Takanori Asaba |
| Takao Fujii |
| Takayuki Tsunakawa |
| Takuma Hoshiai |
| Tatsuhito Kasahara |
| Tatsuo Ishii |
| Tatsuro Yamada |
| Taylor Vesely |
| Teodor Sigaev |
| Tham Nguyen |
| Thibaut Madelaine |
| Thom Brown |
| Thomas Kellerer |
| Thomas Munro |
| Tiago Anastacio |
| Tim Clarke |
| Tim Möhlmann |
| Tom Ellis |
| Tom Gottfried |
| Tom Lane |
| Tomas Vondra |
| Tuomas Leikola |
| Tushar Ahuja |
| Victor Wagner |
| Victor Yegorov |
| Vignesh C |
| Vik Fearing |
| Vinay Banakar |
| Vladimir Leskov |
| Vladimir Sitnikov |
| Vyacheslav Makarov |
| Vyacheslav Shablistyy |
| Will Leinweber |
| William Crowell |
| Wyatt Alt |
| Yang Xiao |
| Yaroslav Schekin |
| Yi Huang |
| Yigong Hu |
| Yoann La Cancellera |
| Yoshikazu Imai |
| Yu Kimura |
| Yugo Nagata |
| Yuli Khodorkovskiy |
| Yusuke Egashira |
| Yuya Watari |
| Yuzuko Hosoya |
| ZhenHua Cai |
