Peter Eisentraut [Mon, 12 Jan 2026 15:12:56 +0000 (16:12 +0100)]
Avoid casting void * function arguments
In many cases, the cast would silently drop a const qualifier. To
fix, drop the unnecessary cast and let the compiler check the types
and qualifiers. Add const to read-only local variables, preserving
the const qualifiers from the function signatures.
Co-authored-by: Bertrand Drouvot <bertranddrouvot.pg@gmail.com>
Co-authored-by: Peter Eisentraut <peter@eisentraut.org>
Discussion: https://postgr.es/m/aUQHy/MmWq7c97wK%40ip-10-97-1-34.eu-west-3.compute.internal
Peter Eisentraut [Mon, 12 Jan 2026 13:26:26 +0000 (14:26 +0100)]
Add const to read only TableInfo pointers in pg_dump
Functions that dump table data receive their parameters through const
void * but were casting away const. Add const qualifiers to functions
that only read the table information.
Author: Bertrand Drouvot <bertranddrouvot.pg@gmail.com>
Discussion: https://postgr.es/m/aUQHy/MmWq7c97wK%40ip-10-97-1-34.eu-west-3.compute.internal
Peter Eisentraut [Mon, 12 Jan 2026 07:35:48 +0000 (08:35 +0100)]
Make dmetaphone collation-aware
The dmetaphone() SQL function internally upper-cases the argument
string. It did this using the toupper() function. That way, it has a
dependency on the global LC_CTYPE locale setting, which we want to get
rid of.
The "double metaphone" algorithm specifically supports the "C with
cedilla" letter, so just using ASCII case conversion wouldn't work.
To fix that, use the passed-in collation and use the str_toupper()
function, which has full awareness of collations and collation
providers.
Note that this does not change the fact that this function only works
correctly with single-byte encodings. The change to str_toupper()
makes the case conversion multibyte-enabled, but the rest of the
function is still not ready.
Reviewed-by: Jeff Davis <pgsql@j-davis.com>
Discussion: https://www.postgresql.org/message-id/
108e07a2-0632-4f00-984d-
fe0e0d0ec726%40eisentraut.org
Nathan Bossart [Sun, 11 Jan 2026 19:52:50 +0000 (13:52 -0600)]
pg_dump: Fix memory leak in dumpSequenceData().
Oversight in commit
7a485bd641. Per Coverity.
Backpatch-through: 18
Michael Paquier [Sun, 11 Jan 2026 06:24:02 +0000 (15:24 +0900)]
doc: Improve description of pg_restore --jobs
The parameter name used for the option value was named "number-of-jobs",
which was inconsistent with what all the other tools with an option
called --jobs use. This commit updates the parameter name to "njobs".
Author: Tatsuro Yamada <yamatattsu@gmail.com>
Discussion: https://postgr.es/m/CAOKkKFvHqA6Tny0RKkezWVfVV91nPJyj4OGtMi3C1RznDVXqrg@mail.gmail.com
Michael Paquier [Sat, 10 Jan 2026 23:16:46 +0000 (08:16 +0900)]
Fix some typos across the board
Found while browsing the code.
Andres Freund [Fri, 9 Jan 2026 17:10:53 +0000 (12:10 -0500)]
instrumentation: Keep time fields as instrtime, convert in callers
Previously the instrumentation logic always converted to seconds, only for
many of the callers to do unnecessary division to get to milliseconds. As an
upcoming refactoring will split the Instrumentation struct, utilize instrtime
always to keep things simpler. It's also a bit faster to not have to first
convert to a double in functions like InstrEndLoop(), InstrAggNode().
Author: Lukas Fittl <lukas@fittl.com>
Reviewed-by: Andres Freund <andres@anarazel.de>
Discussion: https://postgr.es/m/CAP53PkzZ3UotnRrrnXWAv=F4avRq9MQ8zU+bxoN9tpovEu6fGQ@mail.gmail.com
Heikki Linnakangas [Fri, 9 Jan 2026 18:31:43 +0000 (20:31 +0200)]
Inline ginCompareAttEntries for speed
It is called in tight loops during GIN index build.
Author: David Geier <geidav.pg@gmail.com>
Discussion: https://www.postgresql.org/message-id/
5d366878-2007-4d31-861e-
19294b7a583b@gmail.com
Jacob Champion [Fri, 9 Jan 2026 17:59:15 +0000 (09:59 -0800)]
doc: Improve description of publish_via_partition_root
Reword publish_via_partition_root's opening paragraph. Describe its
behavior more clearly, and directly state that its default is false.
Per complaint by Peter Smith; final text of the patch made in
collaboration with Chao Li.
Author: Chao Li <li.evan.chao@gmail.com>
Author: Peter Smith <peter.b.smith@fujitsu.com>
Reported-by: Peter Smith <peter.b.smith@fujitsu.com>
Reviewed-by: Amit Kapila <amit.kapila16@gmail.com>
Discussion: https://postgr.es/m/CAHut%2BPu7SpK%2BctOYoqYR3V4w5LKc9sCs6c_qotk9uTQJQ4zp6g%40mail.gmail.com
Backpatch-through: 14
Tom Lane [Fri, 9 Jan 2026 17:59:35 +0000 (12:59 -0500)]
Improve "constraint must include all partitioning columns" message.
This formerly said "unique constraint must ...", which was accurate
enough when it only applied to UNIQUE and PRIMARY KEY constraints.
However, now we use it for exclusion constraints too, and in that
case it's a tad confusing. Do what we already did in the errdetail
message: print the constraint_type, so that it looks like "UNIQUE
constraint ...", "EXCLUDE constraint ...", etc.
Author: jian he <jian.universality@gmail.com>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/CACJufxH6VhAf65Vghg4T2q315gY=Rt4BUfMyunkfRj0n2S9n-g@mail.gmail.com
Nathan Bossart [Fri, 9 Jan 2026 16:12:54 +0000 (10:12 -0600)]
pg_dump: Fix gathering of sequence information.
Since commit
bd15b7db48, pg_dump uses pg_get_sequence_data() (née
pg_sequence_read_tuple()) to gather all sequence data in a single
query as opposed to a query per sequence. Two related bugs have
been identified:
* If the user lacks appropriate privileges on the sequence, pg_dump
generates a setval() command with garbage values instead of
failing as expected.
* pg_dump can fail due to a concurrently dropped sequence, even if
the dropped sequence's data isn't part of the dump.
This commit fixes the above issues by 1) teaching
pg_get_sequence_data() to return nulls instead of erroring for a
missing sequence and 2) teaching pg_dump to fail if it tries to
dump the data of a sequence for which pg_get_sequence_data()
returned nulls. Note that pg_dump may still fail due to a
concurrently dropped sequence, but it should now only do so when
the sequence data is part of the dump. This matches the behavior
before commit
bd15b7db48.
Bug: #19365
Reported-by: Paveł Tyślacki <pavel.tyslacki@gmail.com>
Suggested-by: Tom Lane <tgl@sss.pgh.pa.us>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/19365-
6245240d8b926327%40postgresql.org
Discussion: https://postgr.es/m/
2885944.
1767029161%40sss.pgh.pa.us
Backpatch-through: 18
Fujii Masao [Fri, 9 Jan 2026 11:24:00 +0000 (20:24 +0900)]
Use IsA() macro in define.c, for sake of consistency.
Commit
63d1b1cf7f1 replaced a direct nodeTag() comparison with the IsA()
macro in copy.c, but a similar direct comparison remained in define.c.
This commit replaces that comparison with IsA() for consistency.
Author: Fujii Masao <masao.fujii@gmail.com>
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Reviewed-by: Shinya Kato <shinya11.kato@gmail.com>
Reviewed-by: Bertrand Drouvot <bertranddrouvot.pg@gmail.com>
Discussion: https://postgr.es/m/CAHGQGwGjWGS89_sTx=sbPm0FQemyQQrfTKm=taUhAJFV5k-9cw@mail.gmail.com
Peter Eisentraut [Fri, 9 Jan 2026 09:25:02 +0000 (10:25 +0100)]
Decouple C++ support in Meson's PGXS from LLVM enablement
This is important for Postgres extensions that are written in C++,
such as pg_duckdb, which uses PGXS as the build system currently. In
the autotools build, C++ is not coupled to LLVM. If the autotools
build is configured without --with-llvm, the C++ compiler and the
various flags get persisted into the Makefile.global.
Author: Tristan Partin <tristan@partin.io>
Author: Jelte Fennema-Nio <postgres@jeltef.nl>
Discussion: https://www.postgresql.org/message-id/flat/D98JHQF7H2A8.VSE3I4CJBTAB%40partin.io
Peter Eisentraut [Fri, 9 Jan 2026 07:58:50 +0000 (08:58 +0100)]
ci: Configure g++ with 32-bit for 32-bit build
In future commits, we'll start to make improvements to C++
infrastructure. This requires that for our 32-bit builds we also
build C++ code for the 32-bit architecture.
Author: Jelte Fennema-Nio <postgres@jeltef.nl>
Discussion: https://www.postgresql.org/message-id/flat/D98JHQF7H2A8.VSE3I4CJBTAB%40partin.io
Peter Eisentraut [Fri, 9 Jan 2026 07:58:23 +0000 (08:58 +0100)]
meson: Rename cpp variable to cxx
Since CPP is also used to mean C PreProcessor in our meson.build
files, it's confusing to use it to also mean C PlusPlus. This uses
the non-ambiguous cxx wherever possible.
Author: Jelte Fennema-Nio <postgres@jeltef.nl>
Discussion: https://www.postgresql.org/message-id/flat/D98JHQF7H2A8.VSE3I4CJBTAB%40partin.io
David Rowley [Thu, 8 Jan 2026 22:01:36 +0000 (11:01 +1300)]
Fix possible incorrect column reference in ERROR message
When creating a partition for a RANGE partitioned table, the reporting
of errors relating to converting the specified range values into
constant values for the partition key's type could display the name of a
previous partition key column when an earlier range was specified as
MINVALUE or MAXVALUE.
This was caused by the code not correctly incrementing the index that
tracks which partition key the foreach loop was working on after
processing MINVALUE/MAXVALUE ranges.
Fix by using foreach_current_index() to ensure the index variable is
always set to the List element being worked on.
Author: myzhen <zhenmingyang@yeah.net>
Reviewed-by: zhibin wang <killerwzb@gmail.com>
Discussion: https://postgr.es/m/
273cab52.978.
19b96fc75e7.Coremail.zhenmingyang@yeah.net
Backpatch-through: 14
Tom Lane [Thu, 8 Jan 2026 19:09:58 +0000 (14:09 -0500)]
Remove now-useless btree_gist--1.2.sql script.
In the wake of the previous commit, this script will fail
if executed via CREATE EXTENSION, so it's useless. Remove it,
but keep the delta scripts, allowing old (even very old)
versions of the btree_gist SQL objects to be upgraded to 1.9
via ALTER EXTENSION UPDATE after a pg_upgrade.
Author: Tom Lane <tgl@sss.pgh.pa.us>
Reviewed-by: Matthias van de Meent <boekewurm+postgres@gmail.com>
Reviewed-by: Heikki Linnakangas <hlinnaka@iki.fi>
Discussion: https://postgr.es/m/
2483812.
1754072263@sss.pgh.pa.us
Tom Lane [Thu, 8 Jan 2026 19:03:56 +0000 (14:03 -0500)]
Mark GiST inet_ops as opcdefault, and deal with ensuing fallout.
This patch completes the transition to making inet_ops be default for
inet/cidr columns, rather than btree_gist's opclasses. Once we do
that, though, pg_upgrade has a big problem. A dump from an older
version will see btree_gist's opclasses as being default, so it will
not mention the opclass explicitly in CREATE INDEX commands, which
would cause the restore to create the indexes using inet_ops. Since
that's not compatible with what's actually in the files, havoc would
ensue.
This isn't readily fixable, because the CREATE INDEX command strings
are built by the older server's pg_get_indexdef() function; pg_dump
hasn't nearly enough knowledge to modify those strings successfully.
Even if we cared to put in the work to make that happen in pg_dump,
it would be counterproductive because the end goal here is to get
people off of these opclasses. Allowing such indexes to persist
through pg_upgrade wouldn't advance that goal.
Therefore, this patch just adds code to pg_upgrade to detect indexes
that would be problematic and refuse to upgrade.
There's another issue too: even without any indexes to worry about,
pg_dump in binary-upgrade mode will reproduce the "CREATE OPERATOR
CLASS ... DEFAULT" commands for btree_gist's opclasses, and those
will fail because now we have a built-in opclass that provides a
conflicting default. We could ask users to drop the btree_gist
extension altogether before upgrading, but that would carry very
severe penalties. It would affect perfectly-valid indexes for other
data types, and it would drop operators that might be relied on in
views or other database objects. Instead, put a hack in DefineOpClass
to ignore the DEFAULT clauses for these opclasses when in
binary-upgrade mode. This will result in installing a version of
btree_gist that isn't quite the version it claims to be, but that can
be fixed by issuing ALTER EXTENSION UPDATE afterwards.
Since we don't apply that hack when not in binary-upgrade mode,
it is now impossible to install any version of btree_gist
less than 1.9 via CREATE EXTENSION.
Author: Tom Lane <tgl@sss.pgh.pa.us>
Reviewed-by: Matthias van de Meent <boekewurm+postgres@gmail.com>
Reviewed-by: Heikki Linnakangas <hlinnaka@iki.fi>
Discussion: https://postgr.es/m/
2483812.
1754072263@sss.pgh.pa.us
Tom Lane [Thu, 8 Jan 2026 18:56:08 +0000 (13:56 -0500)]
Create btree_gist v1.9, in which inet/cidr opclasses aren't default.
btree_gist's gist_inet_ops and gist_cidr_ops opclasses are
fundamentally broken: they rely on an approximate representation of
the inet values and hence sometimes miss rows they should return.
We want to eventually get rid of them altogether, but as the first
step on that journey, we should mark them not-opcdefault.
To do that, roll up the preceding deltas since 1.2 into a new base
script btree_gist--1.9.sql. This will allow installing 1.9 without
going through a transient situation where gist_inet_ops and
gist_cidr_ops are marked as opcdefault; trying to create them that
way will fail if there's already a matching default opclass in the
core system. Additionally provide btree_gist--1.8--1.9.sql, so
that a database that's been pg_upgraded from an older version can
be migrated to 1.9.
I noted along the way that commit
57e3c5160 had missed marking the
gist_bool_ops support functions as PARALLEL SAFE. While that probably
has little harmful effect (since AFAIK we don't check that when
calling index support functions), this seems like a good time to make
things consistent.
Readers will also note that I removed the former habit of installing
some opclass operators/functions with ALTER OPERATOR FAMILY, instead
just rolling them all into the CREATE OPERATOR CLASS steps. The
comment in btree_gist--1.2.sql that it's necessary to use ALTER for
pg_upgrade reproducibility has been obsolete since we invented the
amadjustmembers infrastructure. Nowadays, gistadjustmembers will
force all operators and non-required support functions to have "soft"
opfamily dependencies, regardless of whether they are installed by
CREATE or ALTER.
Author: Tom Lane <tgl@sss.pgh.pa.us>
Reviewed-by: Matthias van de Meent <boekewurm+postgres@gmail.com>
Reviewed-by: Heikki Linnakangas <hlinnaka@iki.fi>
Discussion: https://postgr.es/m/
2483812.
1754072263@sss.pgh.pa.us
Heikki Linnakangas [Thu, 8 Jan 2026 16:58:28 +0000 (18:58 +0200)]
Use IsA macro, for sake of consistency
Reported-by: Shinya Kato <shinya11.kato@gmail.com>
Discussion: https://www.postgresql.org/message-id/CAOzEurS=PzRzGba3mpNXgEhbnQFA0dxXaU0ujCJ0aa9yMSH6Pw@mail.gmail.com
Heikki Linnakangas [Thu, 8 Jan 2026 16:10:08 +0000 (18:10 +0200)]
Fix misc typos, mostly in comments
The only user-visible change is the fix in the "malformed
pg_dependencies" error detail. That one is new in commit
e1405aa5e3ac,
so no backpatching required.
Heikki Linnakangas [Thu, 8 Jan 2026 16:10:05 +0000 (18:10 +0200)]
Improve comments around _bt_checkkeys
Discussion: https://www.postgresql.org/message-id/
f5388839-99da-465a-8744-
23cdfa8ce4db@iki.fi
Amit Kapila [Thu, 8 Jan 2026 09:43:50 +0000 (09:43 +0000)]
Fix typos in the code.
Author: "Dewei Dai" <daidewei1970@163.com>
Author: zengman <zengman@halodbtech.com>
Author: Zhiyuan Su <suzhiyuan_pg@126.com>
Discussion: https://postgr.es/m/
2026010719201902382410@163.com
Discussion: https://postgr.es/m/tencent_4DC563C83443A4B1082D2BFF@qq.com
Discussion: https://postgr.es/m/
44656d72.2a63.
19b9b92b0a3.Coremail.suzhiyuan_pg@126.com
Peter Eisentraut [Thu, 8 Jan 2026 07:45:59 +0000 (08:45 +0100)]
Remove use of rindex() function
rindex() has been removed from POSIX 2008. Replace the one remaining
use with the equivalent and more standard strrchr().
Reviewed-by: Jelte Fennema-Nio <postgres@jeltef.nl>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://www.postgresql.org/message-id/flat/
98ce805c-6103-421b-adc3-
fcf8f3dddbe3%40eisentraut.org
Peter Eisentraut [Thu, 8 Jan 2026 07:45:59 +0000 (08:45 +0100)]
strnlen() is now required
Remove all configure checks and workarounds for strnlen() missing. It
is required by POSIX 2008.
Reviewed-by: Jelte Fennema-Nio <postgres@jeltef.nl>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://www.postgresql.org/message-id/flat/
98ce805c-6103-421b-adc3-
fcf8f3dddbe3%40eisentraut.org
Michael Paquier [Thu, 8 Jan 2026 01:12:33 +0000 (10:12 +0900)]
pg_createsubscriber: Improve handling of automated recovery configuration
When repurposing a standby to a logical replica, pg_createsubscriber
uses for the new replica a set of configuration parameters saved into
postgresql.auto.conf, to force recovery patterns when the physical
replica is promoted.
While not wrong in practice, this approach can cause issues when forcing
again recovery on a logical replica or its base backup as the recovery
parameters are not reset on the target server once pg_createsubscriber
is done with the node.
This commit aims at improving the situation, by changing the way
recovery parameters are saved on the target node. Instead of writing
all the configuration to postgresql.auto.conf, this file now uses an
include_if_exists, that points to a pg_createsubscriber.conf. This new
file contains all the recovery configuration, and is renamed to
pg_createsubscriber.conf.disabled when pg_createsubscriber exits. This
approach resets the recovery parameters, and offers the benefit to keep
a trace of the setup used when the target node got promoted, for
debugging purposes. If pg_createsubscriber.conf cannot be renamed
(unlikely scenario), a warning is issued to inform users that a manual
intervention may be required to reset this configuration.
This commit includes a test case to demonstrate the problematic case: a
standby node created from a base backup of what was the target node of
pg_createsubscriber does not get confused when started. If removing
this new logic, the test fails with the standby not able to start due
to an incorrect recovery target setup, where the startup process fails
quickly with a FATAL.
I have provided the design idea for the patch, that Alyona has written
(with some code adjustments from me). This could be considered as a
bug, but after discussion this is put into the bucket for improvements.
Redesigning pg_createsubscriber would not be acceptable in the stable
branches anyway.
Author: Alyona Vinter <dlaaren8@gmail.com>
Reviewed-by: Ilyasov Ian <ianilyasov@outlook.com>
Reviewed-by: Alexander Korotkov <aekorotkov@gmail.com>
Reviewed-by: Hayato Kuroda <kuroda.hayato@fujitsu.com>
Reviewed-by: Michael Paquier <michael@paquier.xyz>
Reviewed-by: Andrey Rudometov <unlimitedhikari@gmail.com>
Discussion: https://postgr.es/m/CAGWv16K6L6Pzm99i1KiXLjFWx2bUS3DVsR6yV87-YR9QO7xb3A@mail.gmail.com
Masahiko Sawada [Thu, 8 Jan 2026 00:22:42 +0000 (16:22 -0800)]
psql: Add tab completion for pstdin and pstdout in \copy.
This commit adds tab completion support for the keywords "pstdin" and
"pstdout" in the \copy command. "pstdin" is now suggested after FROM,
and "pstdout" is suggested after TO, alongside filenames and other
keywords.
Author: Yugo Nagata <nagata@sraoss.co.jp>
Reviewed-by: Srinath Reddy Sadipiralla <srinath2133@gmail.com>
Reviewed-by: Kirill Reshke <reshkekirill@gmail.com>
Reviewed-by: Masahiko Sawada <sawada.mshk@gmail.com>
Discussion: https://postgr.es/m/
20251231183953.
95132e171e43abd5e9b78084@sraoss.co.jp
Álvaro Herrera [Wed, 7 Jan 2026 22:44:57 +0000 (19:44 -0300)]
Replace flaky CIC/RI isolation tests with a TAP test
The isolation tests for INSERT ON CONFLICT behavior during CREATE INDEX
CONCURRENTLY and REINDEX CONCURRENTLY (added by
bc32a12e0db2,
2bc7e886fc1b, and
90eae926abbb) were disabled in
77038d6d0b49 due to
persistent CI flakiness, after several attempts at stabilization.
This commit removes them and introduces a TAP test in test_misc module
(010_index_concurrently_upsert.pl) that covers the same scenarios. This
new test should hopefully be more stable while providing assurance that
the fixes in all those commits (plus
81f72115cf18) continue to work.
Author: Mihail Nikalayeu <mihailnikalayeu@gmail.com>
Reported-by: Andres Freund <andres@anarazel.de>
Reviewed-by: Álvaro Herrera <alvherre@kurilemu.de>
Discussion: https://postgr.es/m/ccssrhafzbp3a3beju3ptyc56a7gbfimj4vwkbokoldofckrc7@bso37rxskjtf
Discussion: https://postgr.es/m/CANtu0ogv+6wqRzPK241jik4U95s1pW3MCZ3rX5ZqbFdUysz7Qw@mail.gmail.com
Discussion: https://postgr.es/m/
202512112014.icpomgc37zx4@alvherre.pgsql
Nathan Bossart [Wed, 7 Jan 2026 19:42:57 +0000 (13:42 -0600)]
MSVC: Support building for AArch64.
This commit does the following to get tests passing for
MSVC/AArch64:
* Implements spin_delay() with an ISB instruction (like we do for
gcc/clang on AArch64).
* Sets USE_ARMV8_CRC32C unconditionally. Vendor-supported versions
of Windows for AArch64 require at least ARMv8.1, which is where CRC
extension support became mandatory.
* Implements S_UNLOCK() with _InterlockedExchange(). The existing
implementation for MSVC uses _ReadWriteBarrier() (a compiler
barrier), which is insufficient for this purpose on non-TSO
architectures.
There are likely other changes required to take full advantage of
the hardware (e.g., atomics/arch-arm.h, simd.h,
pg_popcount_aarch64.c), but those can be dealt with later.
Author: Niyas Sait <niyas.sait@linaro.org>
Co-authored-by: Greg Burd <greg@burd.me>
Co-authored-by: Dave Cramer <davecramer@gmail.com>
Reviewed-by: Michael Paquier <michael@paquier.xyz>
Reviewed-by: John Naylor <johncnaylorls@gmail.com>
Reviewed-by: Peter Eisentraut <peter@eisentraut.org>
Reviewed-by: Andres Freund <andres@anarazel.de>
Reviewed-by: Thomas Munro <thomas.munro@gmail.com>
Tested-by: Andrew Dunstan <andrew@dunslane.net>
Discussion: https://postgr.es/m/
A6152C7C-F5E3-4958-8F8E-
7692D259FF2F%40greg.burd.me
Discussion: https://postgr.es/m/CAFPTBD-74%2BAEuN9n7caJ0YUnW5A0r-KBX8rYoEJWqFPgLKpzdg%40mail.gmail.com
Peter Geoghegan [Wed, 7 Jan 2026 17:53:07 +0000 (12:53 -0500)]
Fix nbtree skip array transformation comments.
Fix comments that incorrectly described transformations performed by the
"Avoid extra index searches through preprocessing" mechanism introduced
by commit
b3f1a13f.
Author: Yugo Nagata <nagata@sraoss.co.jp>
Reviewed-By: Chao Li <li.evan.chao@gmail.com>
Reviewed-By: Peter Geoghegan <pg@bowt.ie>
Discussion: https://postgr.es/m/
20251230190145.
c3c88c5eb0f88b136adda92f@sraoss.co.jp
Backpatch-through: 18
Fujii Masao [Wed, 7 Jan 2026 16:10:36 +0000 (01:10 +0900)]
doc: Remove deprecated clauses from CREATE USER/GROUP syntax synopsis.
The USER and IN GROUP clauses of CREATE ROLE are deprecated, and
commit
8e78f0a1 removed them from the CREATE ROLE syntax syntax
synopsis in the docs. However, previously CREATE USER and
CREATE GROUP docs still listed these clauses.
Since CREATE USER is equivalent to CREATE ROLE ... WITH LOGIN and
CREATE GROUP is equivalent to CREATE ROLE, their documented syntax
synopsis should match CREATE ROLE to avoid confusion.
Therefore this commit removes the deprecated USER and IN GROUP
clauses from the CREATE USER and CREATE GROUP syntax synopsis
in the docs.
Author: Japin Li <japinli@hotmail.com>
Reviewed-by: wenhui qiu <qiuwenhuifx@gmail.com>
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Reviewed-by: Fujii Masao <masao.fujii@gmail.com>
Discussion: https://postgr.es/m/MEAPR01MB3031C30E72EF16CFC08C8565B687A@MEAPR01MB3031.ausprd01.prod.outlook.com
Alexander Korotkov [Wed, 7 Jan 2026 14:29:58 +0000 (16:29 +0200)]
Revert "Use WAIT FOR LSN in PostgreSQL::Test::Cluster::wait_for_catchup()"
This reverts commit
f30848cb05d4d63e1a5a2d6a9d72604f3b63370d. Due to
buildfarm failures related to recovery conflicts while executing the
WAIT FOR command. It appears that WAIT FOR still holds xmin for a while.
Reported-by: Thomas Munro <thomas.munro@gmail.com>
Discussion: https://postgr.es/m/CA%2BhUKG%2BL0OQR8dQtsNBSaA3FNNyQeFabdeRVzurm0b7Xtp592g%40mail.gmail.com
Peter Eisentraut [Wed, 7 Jan 2026 14:47:02 +0000 (15:47 +0100)]
Fix typo
Reported-by: Xueyu Gao <gaoxueyu_hope@163.com>
Discussion: https://www.postgresql.org/message-id/
42b5c99a.856d.
19b73d858e2.Coremail.gaoxueyu_hope%40163.com
John Naylor [Wed, 7 Jan 2026 09:02:19 +0000 (16:02 +0700)]
createuser: Update docs to reflect defaults
Commit
c7eab0e97 changed the default password_encryption setting to
'scram-sha-256', so update the example for creating a user with an
assigned password.
In addition, commit
08951a7c9 added new options that in turn pass
default tokens NOBYPASSRLS and NOREPLICATION to the CREATE ROLE
command, so fix this omission as well for v16 and later.
Reported-by: Heikki Linnakangas <hlinnaka@iki.fi>
Discussion: https://postgr.es/m/
cff1ea60-c67d-4320-9e33-
094637c2c4fb%40iki.fi
Backpatch-through: 14
Michael Paquier [Wed, 7 Jan 2026 08:52:54 +0000 (17:52 +0900)]
Fix unexpected reversal of lists during catcache rehash
During catcache searches, the most-recently searched entries are kept at
the head of the list to speed up subsequent searches, keeping the
"freshest" entries at its beginning. A rehash of the catcache was doing
the opposite: fresh entries were moved to the tail of the newly-created
buckets, causing a rehash to slow down a bit.
When a rehash is done, this commit switches the code to use
dlist_push_tail() instead of dlist_push_head(), so as fresh entries are
kept at the head of the lists, not their tail.
Author: ChangAo Chen <
cca5507@qq.com>
Reviewed-by: John Naylor <johncnaylorls@gmail.com>
Reviewed-by: Michael Paquier <michael@paquier.xyz>
Discussion: https://postgr.es/m/tencent_9EA10D8512B5FE29E7323F780A0749768708@qq.com
Michael Paquier [Wed, 7 Jan 2026 05:13:18 +0000 (14:13 +0900)]
Fix grammar in datatype.sgml
Introduced in
b139bd3b6ef0.
Reported-by: Man Zeng <zengman@halodbtech.com>
Discussion: https://postgr.es/m/tencent_121C1BB152CAF3195C99D56C@qq.com
John Naylor [Wed, 7 Jan 2026 04:55:01 +0000 (11:55 +0700)]
Further doc updates to reflect MD5 deprecation
Followup to
44f49511b.
Author: Fujii Masao <masao.fujii@gmail.com>
Reviewed-by: Heikki Linnakangas <hlinnaka@iki.fi>
Discussion: https://postgr.es/m/CAHGQGwH_UfN96vcvLGA%3DYro%2Bo6qCn0nEgEGoviwzEiLTHtt2Pw%40mail.gmail.com
Backpatch-through: 18
Fujii Masao [Wed, 7 Jan 2026 04:58:07 +0000 (13:58 +0900)]
doc: Add glossary and index entries for GUC.
GUC is a commonly used term but previously appeared only
in the acronym documentation. This commit adds glossary and
documentation index entries for GUC to make it easier to find
and understand.
Author: Robert Treat <rob@xzilla.net>
Reviewed-by: Fujii Masao <masao.fujii@gmail.com>
Discussion: https://postgr.es/m/CABV9wwPQnkeo_G6-orMGnHPK9SXGVWm7ajJPzsbE6944tDx=hQ@mail.gmail.com
Fujii Masao [Wed, 7 Jan 2026 04:57:36 +0000 (13:57 +0900)]
doc: Add index entry for Git.
This commit adds Git to the documentation index, pointing to
the source code repository documentation.
Author: Robert Treat <rob@xzilla.net>
Reviewed-by: Fujii Masao <masao.fujii@gmail.com>
Discussion: https://postgr.es/m/CABV9wwPQnkeo_G6-orMGnHPK9SXGVWm7ajJPzsbE6944tDx=hQ@mail.gmail.com
Michael Paquier [Wed, 7 Jan 2026 03:55:16 +0000 (12:55 +0900)]
Improve portability of test with oid8 comparison function
Oversight in
b139bd3b6ef0, per reports from buildfarm members longfin
and prion, that use -DSTRESS_SORT_INT_MIN. Thanks to Tom Lane for the
poke.
Discussion: https://postgr.es/m/
1656709.
1767754981@sss.pgh.pa.us
Michael Paquier [Wed, 7 Jan 2026 02:37:00 +0000 (11:37 +0900)]
Add data type oid8, 64-bit unsigned identifier
This new identifier type provides support for 64-bit unsigned values,
to be used in catalogs, like OIDs. An advantage of a new data type is
that it becomes easier to grep for it in the code when assigning this
type to a catalog attribute, linking it to dedicated APIs and internal
structures.
The following operators are added in this commit, with dedicated tests:
- Casts with integer types and OID.
- btree and hash operators
- min/max functions.
- C type with related macros and defines, named around "Oid8".
This has been mentioned as useful on its own on the thread to add
support for 64-bit TOAST values, so as it becomes possible to attach
this data type to the TOAST code and catalog definitions. However, as
this concept can apply to many more areas, it is implemented as its own
independent change. This is based on a discussion with Andres Freund
and Tom Lane.
Bump catalog version.
Author: Michael Paquier <michael@paquier.xyz>
Reviewed-by: Greg Burd <greg@burd.me>
Reviewed-by: Nikhil Kumar Veldanda <veldanda.nikhilkumar17@gmail.com>
Discussion: https://postgr.es/m/
1891064.
1754681536@sss.pgh.pa.us
Jeff Davis [Wed, 7 Jan 2026 01:19:51 +0000 (17:19 -0800)]
Clean up ICU includes.
Remove ICU includes from pg_locale.h, and instead include them in the
few C files that need ICU. Clean up a few other includes in passing.
Reviewed-by: Andres Freund <andres@anarazel.de>
Discussion: https://postgr.es/m/
48911db71d953edec66df0d2ce303563d631fbe0.camel@j-davis.com
Andres Freund [Wed, 7 Jan 2026 00:51:10 +0000 (19:51 -0500)]
Fix buggy interaction between array subscripts and subplan params
In
a7f107df2 I changed subplan param evaluation to happen within the
containing expression. As part of that, ExecInitSubPlanExpr() was changed to
evaluate parameters via a new EEOP_PARAM_SET expression step. These parameters
were temporarily stored into ExprState->resvalue/resnull, with some reasoning
why that would be fine. Unfortunately, that analysis was wrong -
ExecInitSubscriptionRef() evaluates the input array into "resv"/"resnull",
which will often point to ExprState->resvalue/resnull. This means that the
EEOP_PARAM_SET, if inside an array subscript, would overwrite the input array
to array subscript.
The fix is fairly simple - instead of evaluating into
ExprState->resvalue/resnull, store the temporary result of the subplan in the
subplan's return value.
Bug: #19370
Reported-by: Zepeng Zhang <redraiment@gmail.com>
Diagnosed-by: Tom Lane <tgl@sss.pgh.pa.us>
Diagnosed-by: Andres Freund <andres@anarazel.de>
Discussion: https://postgr.es/m/19370-
7fb7a5854b7618f1@postgresql.org
Backpatch-through: 18
Jeff Davis [Tue, 6 Jan 2026 22:09:07 +0000 (14:09 -0800)]
ICU: use UTF8-optimized case conversion API
Initializes a UCaseMap object once for use across calls, and uses
UTF8-optimized APIs.
Author: Andreas Karlsson <andreas@proxel.se>
Reviewed-by: zengman <zengman@halodbtech.com>
Discussion: https://postgr.es/m/
5a010b27-8ed9-4739-86fe-
1562b07ba564@proxel.se
Michael Paquier [Tue, 6 Jan 2026 11:24:17 +0000 (20:24 +0900)]
Improve portability of new worker_spi test
The new test 002_worker_terminate relies on the generation of a LOG
entry to check that a worker has been started, but missed the fact that
a node set with log_error_verbosity = verbose would add an error code.
The regexp used for the matching check did not take this case into
account, making the test fail on a timeout. The regexp is now fixed to
handle the verbose case correctly.
Per buildfarm member prion, that uses log_error_verbosity = verbose.
The error was reproducible by setting this GUC the same way in the test.
Oversight in
f1e251be80a0.
Peter Eisentraut [Tue, 6 Jan 2026 08:37:19 +0000 (09:37 +0100)]
Add test coverage for indirection transformation
These tests cover nested arrays of composite data types,
single-argument functions, and casting using dot-notation, providing a
baseline for future enhancements to jsonb dot-notation support.
Author: Alexandra Wang <alexandra.wang.oss@gmail.com>
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/CAK98qZ1JNNAx4QneJG+eX7iLesOhd6A68FNQVvvHP6Up_THf3A@mail.gmail.com
Alexander Korotkov [Tue, 6 Jan 2026 08:03:26 +0000 (10:03 +0200)]
Fix variable usage in wakeupWaiters()
Mistakenly, `i` was used both as an integer representation of lsnType and
an index in wakeUpProcs array.
Discussion: https://postgr.es/m/CA%2BhUKG%2BL0OQR8dQtsNBSaA3FNNyQeFabdeRVzurm0b7Xtp592g%40mail.gmail.com
Reviewed-by: Thomas Munro <thomas.munro@gmail.com>
Reviewed-by: Ruikai Peng <ruikai@pwno.io>
Michael Paquier [Tue, 6 Jan 2026 07:17:59 +0000 (16:17 +0900)]
Use relation_close() more consistently in contrib/
All the code paths updated here have been using index_close() to
close a relation that was opened with relation_open(), in pgstattuple
and pageinspect. index_close() does the same thing as relation_close(),
so there is no harm, but being inconsistent could lead to issues if the
internals of these close() functions begin to introduce some specific
logic in the future.
In passing, this commit adds some comments explaining why we are using
relation_open() instead of index_open() in a few places, which is due to
the fact that partitioned indexes are not allowed in these functions.
Author: Bertrand Drouvot <bertranddrouvot.pg@gmail.com>
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Reviewed-by: Japin Li <japinli@hotmail.com>
Discussion: https://postgr.es/m/aUKamYGiDKO6byp5@ip-10-97-1-34.eu-west-3.compute.internal
Michael Paquier [Tue, 6 Jan 2026 05:24:29 +0000 (14:24 +0900)]
Allow bgworkers to be terminated for database-related commands
Background workers gain a new flag, called BGWORKER_INTERRUPTIBLE, that
offers the possibility to terminate the workers when these are connected
to a database that is involved in one of the following commands:
ALTER DATABASE RENAME TO
ALTER DATABASE SET TABLESPACE
CREATE DATABASE
DROP DATABASE
This is useful to give background workers the same behavior as backends
and autovacuum workers, which are stopped when these commands are
executed. The default behavior, that exists since 9.3, is still to
never terminate bgworkers connected to the database involved in any of
these commands. The new flag has to be set to terminate the workers.
A couple of tests are added to worker_spi to track the commands that
impact the termination of the workers. There is a test case for a
non-interruptible worker, additionally, that relies on an injection
point to make the wait time in CountOtherDBBackends() reduced from 5s to
0.3s for faster test runs. The tests rely on the contents of the server
logs to check if a worker has been started or terminated:
- LOG generated by worker_spi_main() at startup, once connection to
database is done.
- FATAL in bgworker_die() when terminated.
A couple of tests run in the CI have showed that this method is stable
enough. The safe_psql() calls that scan pg_stat_activity could be
replaced with some poll_query_until() for more stability, if the current
method proves to be an issue in the buildfarm.
Author: Aya Iwata <iwata.aya@fujitsu.com>
Reviewed-by: Hayato Kuroda <kuroda.hayato@fujitsu.com>
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Reviewed-by: Ryo Matsumura <matsumura.ryo@fujitsu.com>
Reviewed-by: Michael Paquier <michael@paquier.xyz>
Reviewed-by: Peter Smith <smithpb2250@gmail.com>
Discussion: https://postgr.es/m/OS7PR01MB11964335F36BE41021B62EAE8EAE4A@OS7PR01MB11964.jpnprd01.prod.outlook.com
Amit Kapila [Tue, 6 Jan 2026 05:02:25 +0000 (05:02 +0000)]
Update comments atop ReplicationSlotCreate.
Since commit
1462aad2e4, which introduced the ability to modify the
two_phase property of a slot, the comments above ReplicationSlotCreate
have become outdated. We have now added a cautionary note in the comments
above ReplicationSlotAlter explaining when it is safe to modify the
two_phase property of a slot.
Author: Daniil Davydov <3danissimo@gmail.com>
Author: Amit Kapila <amit.kapila16@gmail.com>
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Reviewed-by: Hayato Kuroda <kuroda.hayato@fujitsu.com>
Backpatch-through: 18
Discussion: https://postgr.es/m/CAJDiXggZXQZ7bD0QcTizDt6us9aX6ZKK4dWxzgb5x3+TsVHjqQ@mail.gmail.com
David Rowley [Tue, 6 Jan 2026 04:29:12 +0000 (17:29 +1300)]
Fix issue with EVENT TRIGGERS and ALTER PUBLICATION
When processing the "publish" options of an ALTER PUBLICATION command,
we call SplitIdentifierString() to split the options into a List of
strings. Since SplitIdentifierString() modifies the delimiter
character and puts NULs in their place, this would overwrite the memory
of the AlterPublicationStmt. Later in AlterPublicationOptions(), the
modified AlterPublicationStmt is copied for event triggers, which would
result in the event trigger only seeing the first "publish" option
rather than all options that were specified in the command.
To fix this, make a copy of the string before passing to
SplitIdentifierString().
Here we also adjust a similar case in the pgoutput plugin. There's no
known issues caused by SplitIdentifierString() here, so this is being
done out of paranoia.
Thanks to Henson Choi for putting together an example case showing the
ALTER PUBLICATION issue.
Author: sunil s <sunilfeb26@gmail.com>
Reviewed-by: Henson Choi <assam258@gmail.com>
Reviewed-by: zengman <zengman@halodbtech.com>
Backpatch-through: 14
Amit Kapila [Tue, 6 Jan 2026 04:13:40 +0000 (04:13 +0000)]
Fix typo in slot.c.
Author: Chao Li <li.evan.chao@gmail.com>
Discussion: https://postgr.es/m/
AC9B87F1-ED04-4547-B85C-
9443B4253A08@gmail.com
Discussion: https://postgr.es/m/CAJDiXggZXQZ7bD0QcTizDt6us9aX6ZKK4dWxzgb5x3+TsVHjqQ@mail.gmail.com
Michael Paquier [Tue, 6 Jan 2026 03:30:01 +0000 (12:30 +0900)]
Fix typo in planner.c
b8cfcb9e00da did not get this change right.
Author: Alexander Law <exclusion@gmail.com>
Discussion: https://postgr.es/m/CAJ0YPFFWhJXs-e-=7iJz-FLp=b1dXfJA_qtrVAgto=bZmzD9zQ@mail.gmail.com
Fujii Masao [Tue, 6 Jan 2026 02:57:12 +0000 (11:57 +0900)]
Add TAP test for GUC settings passed via CONNECTION in logical replication.
Commit
d926462d819 restored the behavior of passing GUC settings from
the CONNECTION string to the publisher's walsender, allowing per-connection
configuration.
This commit adds a TAP test to verify that behavior works correctly.
Since commit
d926462d819 was recently applied and backpatched to v15,
this follow-up commit is also backpatched accordingly.
Author: Fujii Masao <masao.fujii@gmail.com>
Reviewed-by: Chao Li <lic@highgo.com>
Reviewed-by: Kirill Reshke <reshkekirill@gmail.com>
Reviewed-by: Amit Kapila <amit.kapila16@gmail.com>
Reviewed-by: Japin Li <japinli@hotmail.com>
Discussion: https://postgr.es/m/CAHGQGwGYV+-abbKwdrM2UHUe-JYOFWmsrs6=QicyJO-j+-Widw@mail.gmail.com
Backpatch-through: 15
Fujii Masao [Tue, 6 Jan 2026 02:52:22 +0000 (11:52 +0900)]
Honor GUC settings specified in CREATE SUBSCRIPTION CONNECTION.
Prior to v15, GUC settings supplied in the CONNECTION clause of
CREATE SUBSCRIPTION were correctly passed through to
the publisher's walsender. For example:
CREATE SUBSCRIPTION mysub
CONNECTION 'options=''-c wal_sender_timeout=1000'''
PUBLICATION ...
would cause wal_sender_timeout to take effect on the publisher's walsender.
However, commit
f3d4019da5d changed the way logical replication
connections are established, forcing the publisher's relevant
GUC settings (datestyle, intervalstyle, extra_float_digits) to
override those provided in the CONNECTION string. As a result,
from v15 through v18, GUC settings in the CONNECTION string were
always ignored.
This regression prevented per-connection tuning of logical replication.
For example, using a shorter timeout for walsender connecting
to a nearby subscriber and a longer one for walsender connecting
to a remote subscriber.
This commit restores the intended behavior by ensuring that
GUC settings in the CONNECTION string are again passed through
and applied by the walsender, allowing per-connection configuration.
Backpatch to v15, where the regression was introduced.
Author: Fujii Masao <masao.fujii@gmail.com>
Reviewed-by: Chao Li <lic@highgo.com>
Reviewed-by: Kirill Reshke <reshkekirill@gmail.com>
Reviewed-by: Amit Kapila <amit.kapila16@gmail.com>
Reviewed-by: Japin Li <japinli@hotmail.com>
Discussion: https://postgr.es/m/CAHGQGwGYV+-abbKwdrM2UHUe-JYOFWmsrs6=QicyJO-j+-Widw@mail.gmail.com
Backpatch-through: 15
David Rowley [Tue, 6 Jan 2026 02:25:13 +0000 (15:25 +1300)]
Simplify GetOperatorFromCompareType() code
The old code would set *opid = InvalidOid to determine if the
get_opclass_opfamily_and_input_type() worked or not. This means more
moving parts that what's really needed here. Let's just fail
immediately if the get_opclass_opfamily_and_input_type() lookup fails.
Author: Paul A Jungwirth <pj@illuminatedcomputing.com>
Reviewed-by: Neil Chen <carpenter.nail.cz@gmail.com>
Discussion: https://postgr.es/m/CA+renyXOrjLacP_nhqEQUf2W+ZCoY2q5kpQCfG05vQVYzr8b9w@mail.gmail.com
David Rowley [Tue, 6 Jan 2026 02:16:14 +0000 (15:16 +1300)]
Fix misleading comment for GetOperatorFromCompareType
The comment claimed *strat got set to InvalidStrategy when the function
lookup fails. This isn't true; an ERROR is raised when that happens.
Author: Paul A Jungwirth <pj@illuminatedcomputing.com>
Reviewed-by: Neil Chen <carpenter.nail.cz@gmail.com>
Discussion: https://postgr.es/m/CA+renyXOrjLacP_nhqEQUf2W+ZCoY2q5kpQCfG05vQVYzr8b9w@mail.gmail.com
Backpatch-through: 18
Fujii Masao [Tue, 6 Jan 2026 02:00:54 +0000 (11:00 +0900)]
doc: Fix outdated doc in pg_rewind.
Update pg_rewind documentation to reflect the change that data checksums are
now enabled by default during initdb.
Backpatch to v18, where data checksums were changed to be enabled by default.
Author: Zhijie Hou <houzj.fnst@fujitsu.com>
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Reviewed-by: Fujii Masao <masao.fujii@gmail.com>
Discussion: https://postgr.es/m/TY4PR01MB16907D62F3A0A377B30FDBEA794B2A@TY4PR01MB16907.jpnprd01.prod.outlook.com
Backpatch-through: 18
David Rowley [Tue, 6 Jan 2026 01:39:36 +0000 (14:39 +1300)]
Clarify where various catcache.h dlist_nodes are used
Also remove a comment which mentions we don't currently divide the
per-cache lists into hash buckets. Since
473182c95, we do.
Author: ChangAo Chen <
cca5507@qq.com>
Discussion: https://postgr.es/m/tencent_7732789707C8768EA13785A7B5EA29103208@qq.com
Masahiko Sawada [Mon, 5 Jan 2026 23:49:43 +0000 (15:49 -0800)]
pg_visibility: Fix incorrect buffer lock description in comment.
Although the comment in collect_corrupt_items() stated that the buffer
is locked in exclusive mode, it is actually locked in shared mode.
Author: Chao Li <lic@highgo.com>
Discussion: https://postgr.es/m/CAEoWx2kkhxgfp=kinPMetnwHaa0JjR6YBkO_0gg0oiy6mu7Zjw@mail.gmail.com
Tom Lane [Mon, 5 Jan 2026 21:51:36 +0000 (16:51 -0500)]
Fix meson build of snowball code.
include/snowball/libstemmer has to be in the -I search path,
as it is in the autoconf build. It's not apparent to me how
this ever worked before, nor why my recent commit made it
stop working.
Discussion: https://postgr.es/m/ld2iurl7kzexwydxmdfhdgarpa7xxsfrgvggqhbblt4rvt3h6t@bxsk6oz5x7cc
Tom Lane [Mon, 5 Jan 2026 20:22:12 +0000 (15:22 -0500)]
Update to latest Snowball sources.
It's been almost a year since we last did this, and upstream has
been busy. They've added stemmers for Polish and Esperanto,
and also deprecated their old Dutch stemmer in favor of the
Kraaij-Pohlmann algorithm. (The "dutch" stemmer is now the
latter, and "dutch_porter" is the old algorithm.)
Upstream also decided to rename their internal header "header.h"
to something less generic: "snowball_runtime.h". Seems like a good
thing, but it complicates this patch a bit because we were relying on
interposing our own version of "header.h" to control system header
inclusion order. (We're partially failing at that now, because now the
generated stemmer files include <stddef.h> before snowball_runtime.h.
I think that'll be okay, but if the buildfarm complains then we'll
have to do more-extensive editing of the generated files.)
I realized that we weren't documenting the available stemmers in
any user-visible place, except indirectly through sample \dFd output.
That's incomplete because we only provide built-in dictionaries for
the recommended stemmers for each language, not alternative stemmers
such as dutch_porter. So I added a list to the documentation.
I did not do anything with the stopword lists. If those are still
available from snowballstem.org, they are mighty well hidden.
Discussion: https://postgr.es/m/
1185975.
1767569534@sss.pgh.pa.us
Andres Freund [Mon, 5 Jan 2026 18:09:03 +0000 (13:09 -0500)]
ci: Remove ulimit -p for netbsd/openbsd
Previously the ulimit -p 256 was needed to increase the limit on
openbsd. However, sometimes the limit actually was too low, causing
"could not fork new process for connection: Resource temporarily unavailable"
errors. Most commonly on netbsd, but also on openbsd.
The ulimit on openbsd couldn't trivially be increased with ulimit, because of
hitting the hard limit.
Instead of increasing the limit in the CI script, the CI image generation now
increases the limits: https://github.com/anarazel/pg-vm-images/pull/129
Backpatch-through: 18
Masahiko Sawada [Mon, 5 Jan 2026 18:16:28 +0000 (10:16 -0800)]
Fix typo in parallel.c.
Author: kelan <ke_lan1@qq.com>
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Reviewed-by: Masahiko Sawada <sawada.mshk@gmail.com>
Discussion: https://postgr.es/m/tencent_38B5875E2D440C8DA8C0C022ABD999F9C207@qq.com
Alexander Korotkov [Mon, 5 Jan 2026 17:41:31 +0000 (19:41 +0200)]
Use WAIT FOR LSN in PostgreSQL::Test::Cluster::wait_for_catchup()
When the standby is passed as a PostgreSQL::Test::Cluster instance,
use the WAIT FOR LSN command on the standby server to implement
wait_for_catchup() for replay, write, and flush modes. This is more
efficient than polling pg_stat_replication on the upstream, as the
WAIT FOR LSN command uses a latch-based wakeup mechanism.
The optimization applies when:
- The standby is passed as a Cluster object (not just a name string)
- The mode is 'replay', 'write', or 'flush' (not 'sent')
- The standby is in recovery
For 'sent' mode, when the standby is passed as a string (e.g., a
subscription name for logical replication), or when the standby has
been promoted, the function falls back to the original polling-based
approach using pg_stat_replication on the upstream.
Discussion: https://postgr.es/m/CABPTF7UiArgW-sXj9CNwRzUhYOQrevLzkYcgBydmX5oDes1sjg%40mail.gmail.com
Author: Xuneng Zhou <xunengzhou@gmail.com>
Reviewed-by: Alexander Korotkov <aekorotkov@gmail.com>
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Reviewed-by: Alvaro Herrera <alvherre@kurilemu.de>
Alexander Korotkov [Mon, 5 Jan 2026 17:41:09 +0000 (19:41 +0200)]
Add tab completion for the WAIT FOR LSN MODE option
Update psql tab completion to support the optional MODE option in the
WAIT FOR LSN command. After specifying an LSN value, completion now offers
both MODE and WITH keywords. The MODE option specifies which LSN type to wait
for. In particular, it controls whether the wait is evaluated from the
standby or primary perspective.
When MODE is specified, the completion suggests the valid mode values:
standby_replay, standby_write, standby_flush, and primary_flush.
Discussion: https://postgr.es/m/CABPTF7UiArgW-sXj9CNwRzUhYOQrevLzkYcgBydmX5oDes1sjg%40mail.gmail.com
Author: Xuneng Zhou <xunengzhou@gmail.com>
Reviewed-by: Alexander Korotkov <aekorotkov@gmail.com>
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Reviewed-by: Alvaro Herrera <alvherre@kurilemu.de>
Alexander Korotkov [Mon, 5 Jan 2026 17:40:44 +0000 (19:40 +0200)]
Add the MODE option to the WAIT FOR LSN command
This commit extends the WAIT FOR LSN command with an optional MODE option in
the WITH clause that specifies which LSN type to wait for:
WAIT FOR LSN '<lsn>' [WITH (MODE '<mode>', ...)]
where mode can be:
- 'standby_replay' (default): Wait for WAL to be replayed to the specified
LSN,
- 'standby_write': Wait for WAL to be written (received) to the specified
LSN,
- 'standby_flush': Wait for WAL to be flushed to disk at the specified LSN,
- 'primary_flush': Wait for WAL to be flushed to disk on the primary server.
The default mode is 'standby_replay', matching the original behavior when MODE
is not specified. This follows the pattern used by COPY and EXPLAIN
commands, where options are specified as string values in the WITH clause.
Modes are explicitly named to distinguish between primary and standby
operations:
- Standby modes ('standby_replay', 'standby_write', 'standby_flush') can only
be used during recovery (on a standby server),
- Primary mode ('primary_flush') can only be used on a primary server.
The 'standby_write' and 'standby_flush' modes are useful for scenarios where
applications need to ensure WAL has been received or persisted on the standby
without necessarily waiting for replay to complete. The 'primary_flush' mode
allows waiting for WAL to be flushed on the primary server.
This commit also includes includes:
- Documentation updates for the new syntax and mode descriptions,
- Test coverage for all four modes, including error cases and concurrent
waiters,
- Wakeup logic in walreceiver for standby write/flush waiters,
- Wakeup logic in WAL writer for primary flush waiters.
Discussion: https://postgr.es/m/CABPTF7UiArgW-sXj9CNwRzUhYOQrevLzkYcgBydmX5oDes1sjg%40mail.gmail.com
Author: Xuneng Zhou <xunengzhou@gmail.com>
Reviewed-by: Alexander Korotkov <aekorotkov@gmail.com>
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Reviewed-by: Alvaro Herrera <alvherre@kurilemu.de>
Alexander Korotkov [Mon, 5 Jan 2026 17:40:31 +0000 (19:40 +0200)]
Extend xlogwait infrastructure with write and flush wait types
Add support for waiting on WAL write and flush LSNs in addition to the
existing replay LSN wait type. This provides the foundation for
extending the WAIT FOR command with MODE parameter.
Key changes are following.
- Add WAIT_LSN_TYPE_STANDBY_WRITE and WAIT_LSN_TYPE_STANDBY_FLUSH to
WaitLSNType.
- Add GetCurrentLSNForWaitType() to retrieve the current LSN for each wait
type.
- Add new wait events WAIT_EVENT_WAIT_FOR_WAL_WRITE and
WAIT_EVENT_WAIT_FOR_WAL_FLUSH for pg_stat_activity visibility.
- Update WaitForLSN() to use GetCurrentLSNForWaitType() internally.
Discussion: https://postgr.es/m/CABPTF7UiArgW-sXj9CNwRzUhYOQrevLzkYcgBydmX5oDes1sjg%40mail.gmail.com
Author: Xuneng Zhou <xunengzhou@gmail.com>
Reviewed-by: Alexander Korotkov <aekorotkov@gmail.com>
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Reviewed-by: Alvaro Herrera <alvherre@kurilemu.de>
Alexander Korotkov [Mon, 5 Jan 2026 17:38:03 +0000 (19:38 +0200)]
Adjust errcode in checkPartition()
Replace ERRCODE_UNDEFINED_TABLE with ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE
for the case where we don't find a parent-child relationship between the
partitioned table and its partition. In this case, tables are present, but
they are not in a prerequisite state (no relationship).
Discussion: https://postgr.es/m/CAHewXNmBM%2B5qbrJMu60NxPn%2B0y-%3D2wXM-QVVs3xRp8NxFvDb9A%40mail.gmail.com
Author: Tender Wang <tndrwang@gmail.com>
Reviewed-by: Kirill Reshke <reshkekirill@gmail.com>
Robert Haas [Mon, 5 Jan 2026 16:57:24 +0000 (11:57 -0500)]
Remove redundant SET enable_partitionwise_join = on.
partition_join.sql keeps partitionwise join enabled for the entire file,
so we don't need to enable it for this test case individually.
Author: Ashutosh Bapat <ashutosh.bapat.oss@gmail.com>
Discussion: http://postgr.es/m/CAExHW5uRW=Z==bmLR=NXm6Vv3JGH4rUvb+Rfft8TfjrfzUUm3g@mail.gmail.com
Michael Paquier [Mon, 5 Jan 2026 10:15:55 +0000 (19:15 +0900)]
Fix comment in tableam.c
Author: shiyu qin <qinshy510@gmail.com>
Discussion: https://postgr.es/m/CAJUCM3uJjoLR1zfKoZD4J71T-hdeFdFw1kTQoMkywKZP0hZsvw@mail.gmail.com
Peter Eisentraut [Mon, 5 Jan 2026 09:50:27 +0000 (10:50 +0100)]
Separate read and write pointers in pg_saslprep
Use separate pointers for reading const input ('p') and writing to
mutable output ('outp'), avoiding the need to cast away const on the
input parameter.
Author: Bertrand Drouvot <bertranddrouvot.pg@gmail.com>
Discussion: https://postgr.es/m/aUQHy/MmWq7c97wK%40ip-10-97-1-34.eu-west-3.compute.internal
Heikki Linnakangas [Mon, 5 Jan 2026 09:33:35 +0000 (11:33 +0200)]
Tighten up assertion on a local variable
'lineindex' is 0-based, as mentioned in the comments.
Backpatch to v18 where the assertion was added.
Author: ChangAo Chen <
cca5507@qq.com>
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Discussion: https://www.postgresql.org/message-id/tencent_A84F3C810365BB9BD08442955AE494141907@qq.com
Backpatch-through: 18
David Rowley [Mon, 5 Jan 2026 08:19:03 +0000 (21:19 +1300)]
Use the GetPGProcByNumber() macro when possible
A few places were accessing &ProcGlobal->allProcs directly, so adjust
them to use the accessor macro instead.
Author: Maksim Melnikov <m.melnikov@postgrespro.ru>
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Reviewed-by: David Rowley <dgrowleyml@gmail.com>
Discussion: https://postgr.es/m/
80621c00-aba6-483c-88b1-
a845461d1165@postgrespro.ru
Amit Kapila [Mon, 5 Jan 2026 03:06:55 +0000 (03:06 +0000)]
Improve the comments atop build_replindex_scan_key().
Author: zourenli <
398740848@qq.com>
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Discussion: https://postgr.es/m/tencent_C2DC8157CC05C8F5C36E12678A7864554809@qq.com
Michael Paquier [Mon, 5 Jan 2026 02:03:43 +0000 (11:03 +0900)]
Remove unneeded probes from configure and meson
7d854bdc5b72 has removed two symbols from pg_config.h.in. This file is
automatically generated. The correct cleanup needs to be done in the
build scripts, instead. autoheader produces now a consistent
pg_config.h.in, without the symbols that were removed in the previous
commit.
Reported-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/
1193764.
1767573683@sss.pgh.pa.us
Michael Paquier [Mon, 5 Jan 2026 00:27:19 +0000 (09:27 +0900)]
Remove unneeded defines from pg_config.h.in
This commit removes HAVE_ATOMIC_H and HAVE_MBARRIER_H from
pg_config.h.in, cleanup that could have been done in
25f36066dd2a.
Author: Alexander Lakhin <exclusion@gmail.com>
Discussion: https://postgr.es/m/
b2c0d0b7-3944-487d-a03d-
d155851958ff@gmail.com
Michael Paquier [Mon, 5 Jan 2026 00:19:15 +0000 (09:19 +0900)]
Fix typos and inconsistencies in code and comments
This change is a cocktail of harmonization of function argument names,
grammar typos, renames for better consistency and unused code (see
ltree). All of these have been spotted by the author.
Author: Alexander Lakhin <exclusion@gmail.com>
Discussion: https://postgr.es/m/
b2c0d0b7-3944-487d-a03d-
d155851958ff@gmail.com
Tom Lane [Sun, 4 Jan 2026 23:14:02 +0000 (18:14 -0500)]
Allow role created by new test to log in on Windows.
We must tell init about each role name we plan to connect as,
else SSPI auth fails. Similar to previous patches such as
da44d71e7.
Oversight in
f3c9e341c, per buildfarm member drongo.
Tom Lane [Sun, 4 Jan 2026 19:16:15 +0000 (14:16 -0500)]
Include error location in errors from ComputeIndexAttrs().
Make use of IndexElem's new location field to localize these
errors better.
Author: jian he <jian.universality@gmail.com>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/CACJufxH3OgXF1hrzGAaWyNtye2jHEmk9JbtrtGv-KJK6tsGo5w@mail.gmail.com
Tom Lane [Sun, 4 Jan 2026 18:23:26 +0000 (13:23 -0500)]
Add parse location to IndexElem.
This patch mostly just fills in the field, although a few error
reports in resolve_unique_index_expr() are adjusted to use it.
The next commit will add more uses.
catversion bump out of an abundance of caution: I'm not sure
IndexElem can appear in stored rules, but I'm not sure it can't
either.
Author: Álvaro Herrera <alvherre@kurilemu.de>
Co-authored-by: jian he <jian.universality@gmail.com>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/CACJufxH3OgXF1hrzGAaWyNtye2jHEmk9JbtrtGv-KJK6tsGo5w@mail.gmail.com
Discussion: https://postgr.es/m/
202512121327.f2zimsr6guso@alvherre.pgsql
Heikki Linnakangas [Sun, 4 Jan 2026 18:04:36 +0000 (20:04 +0200)]
Fix partial read handling in pg_upgrade's multixact conversion
Author: Man Zeng <zengman@halodbtech.com>
Discussion: https://www.postgresql.org/message-id/tencent_566562B52163DB1502F4F7A4@qq.com
Peter Eisentraut [Sun, 4 Jan 2026 15:00:15 +0000 (16:00 +0100)]
Remove bogus const qualifier on PageGetItem() argument
The function ends up casting away the const qualifier, so it was a
lie. No callers appear to rely on the const qualifier on the
argument, so the simplest solution is to just remove it.
Reviewed-by: Andres Freund <andres@anarazel.de>
Discussion: https://www.postgresql.org/message-id/beusplf77varvhip6ryuhd2fchsx26qmmhduqz432bnglq634b%402dx4k6yxj4cm
David Rowley [Sun, 4 Jan 2026 08:12:23 +0000 (21:12 +1300)]
Doc: add missing punctuation
Author: Daisuke Higuchi <higuchi.daisuke11@gmail.com>
Reviewed-by: Robert Treat <rob@xzilla.net>
Discussion: https://postgr.es/m/CAEVT6c-yWYstu76YZ7VOxmij2XA8vrOEvens08QLmKHTDjEPBw@mail.gmail.com
Backpatch-through: 14
David Rowley [Sun, 4 Jan 2026 07:32:40 +0000 (20:32 +1300)]
Fix selectivity estimation integer overflow in contrib/intarray
This fixes a poorly written integer comparison function which was
performing subtraction in an attempt to return a negative value when
a < b and a positive value when a > b, and 0 when the values were equal.
Unfortunately that didn't always work correctly due to two's complement
having the INT_MIN 1 further from zero than INT_MAX. This could result
in an overflow and cause the comparison function to return an incorrect
result, which would result in the binary search failing to find the
value being searched for.
This could cause poor selectivity estimates when the statistics stored
the value of INT_MAX (
2147483647) and the value being searched for was
large enough to result in the binary search doing a comparison with that
INT_MAX value.
Author: Chao Li <li.evan.chao@gmail.com>
Reviewed-by: David Rowley <dgrowleyml@gmail.com>
Discussion: https://postgr.es/m/CAEoWx2ng1Ot5LoKbVU-Dh---dFTUZWJRH8wv2chBu29fnNDMaQ@mail.gmail.com
Backpatch-through: 14
Tom Lane [Sat, 3 Jan 2026 22:18:39 +0000 (17:18 -0500)]
Improve a couple of error messages.
Change "function" to "function or procedure" in
PreventInTransactionBlock, and improve grammar of ExecWaitStmt's
complaint about having an active snapshot.
Author: Pavel Stehule <pavel.stehule@gmail.com>
Reviewed-by: Andreas Karlsson <andreas@proxel.se>
Reviewed-by: Marcos Pegoraro <marcos@f10.com.br>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/CAFj8pRCveWPR06bbad9GnMb0Kcr6jnXPttv9XOaOB+oFCD1Tsg@mail.gmail.com
David Rowley [Fri, 2 Jan 2026 04:53:07 +0000 (17:53 +1300)]
Fix spelling mistake in fk-snapshot-3.spec
Author: Aditya Gollamudi <adigollamudi@gmail.com>
Discussion: https://postgr.es/m/CAD-KL_EdOOWp_cmPk9%3D5vNxo%2BabTTRpNx4vex-gVUm8u3GnkTg%40mail.gmail.com
Bruce Momjian [Thu, 1 Jan 2026 18:24:10 +0000 (13:24 -0500)]
Update copyright for 2026
Backpatch-through: 14
Andrew Dunstan [Thu, 1 Jan 2026 17:11:37 +0000 (12:11 -0500)]
Add paths of extensions to pg_available_extensions
Add a new "location" column to the pg_available_extensions and
pg_available_extension_versions views, exposing the directory where
the extension is located.
The default system location is shown as '$system', the same value
that can be used to configure the extension_control_path GUC.
User-defined locations are only visible for super users, otherwise
'<insufficient privilege>' is returned as a column value, the same
behaviour that we already use in pg_stat_activity.
I failed to resist the temptation to do a little extra editorializing of
the TAP test script.
Catalog version bumped.
Author: Matheus Alcantara <mths.dev@pm.me>
Reviewed-By: Chao Li <li.evan.chao@gmail.com>
Reviewed-By: Rohit Prasad <rohit.prasad@arm.com>
Reviewed-By: Michael Banck <mbanck@gmx.net>
Reviewed-By: Manni Wood <manni.wood@enterprisedb.com>
Reviewed-By: Euler Taveira <euler@eulerto.com>
Reviewed-By: Quan Zongliang <quanzongliang@yeah.net>
Masahiko Sawada [Wed, 31 Dec 2025 19:18:14 +0000 (11:18 -0800)]
Fix macro name for io_uring_queue_init_mem check.
Commit
f54af9f2679d added a check for
io_uring_queue_init_mem(). However, it used the macro name
HAVE_LIBURING_QUEUE_INIT_MEM in both meson.build and the C code, while
the Autotools build script defined HAVE_IO_URING_QUEUE_INIT_MEM. As a
result, the optimization was never enabled in builds configured with
Autotools, as the C code checked for the wrong macro name.
This commit changes the macro name to HAVE_IO_URING_QUEUE_INIT_MEM in
meson.build and the C code. This matches the actual function
name (io_uring_queue_init_mem), following the standard HAVE_<FUNCTION>
convention.
Backpatch to 18, where the macro was introduced.
Bug: #19368
Reported-by: Evan Si <evsi@amazon.com>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/19368-
016d79a7f3a1c599@postgresql.org
Backpatch-through: 18
Tom Lane [Wed, 31 Dec 2025 18:19:27 +0000 (13:19 -0500)]
Doc: remove obsolete, confused <note> about rowtype I/O syntax.
This <note> was originally written to describe the double levels
of de-backslashing encountered when a backslash-aware string
literal is used to hold the text representation of a composite
value. It still made sense when we switched to mostly using E'...'
syntax for that type of literal. However, commit
f77de4b0c mangled
it completely by changing the example literal to be SQL-standard.
The extra pass of de-backslashing described in the text doesn't
actually occur with the example as written, unless you happen to
be using standard_conforming_strings = off.
We could restore this <note> to self-consistency by reverting the
change from
f77de4b0c, but on the whole I judge that its time has
passed. standard_conforming_strings = off is nearly obsolete,
and may soon be fully so. But without that, the behavior isn't
so complicated as to justify a discursive note. I observe that
the nearby section about array I/O syntax has no equivalent text,
although that syntax is equally subject to this issue.
Author: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/
2998401.
1767038920@sss.pgh.pa.us
Discussion: https://postgr.es/m/
3279216.
1767072538@sss.pgh.pa.us
Thomas Munro [Wed, 31 Dec 2025 00:24:17 +0000 (13:24 +1300)]
jit: Fix jit_profiling_support when unavailable.
jit_profiling_support=true captures profile data for Linux perf. On
other platforms, LLVMCreatePerfJITEventListener() returns NULL and the
attempt to register the listener would crash.
Fix by ignoring the setting in that case. The documentation already
says that it only has an effect if perf support is present, and we
already did the same for older LLVM versions that lacked support.
No field reports, unsurprisingly for an obscure developer-oriented
setting. Noticed in passing while working on commit
1a28b4b4.
Backpatch-through: 14
Reviewed-by: Matheus Alcantara <matheusssilv97@gmail.com>
Reviewed-by: Andres Freund <andres@anarazel.de>
Discussion: https://postgr.es/m/CA%2BhUKGJgB6gvrdDohgwLfCwzVQm%3DVMtb9m0vzQn%3DCwWn-kwG9w%40mail.gmail.com
Tom Lane [Tue, 30 Dec 2025 23:26:23 +0000 (18:26 -0500)]
Change IndexAmRoutines to be statically-allocated structs.
Up to now, index amhandlers were expected to produce a new, palloc'd
struct on each call. That requires palloc/pfree overhead, and creates
a risk of memory leaks if the caller fails to pfree, and the time
taken to fill such a large structure isn't nil. Moreover, we were
storing these things in the relcache, eating several hundred bytes for
each cached index. There is not anything in these structs that needs
to vary at runtime, so let's change the definition so that an
amhandler can return a pointer to a "static const" struct of which
there's only one copy per index AM. Mark all the core code's
IndexAmRoutine pointers const so that we catch anyplace that might
still try to change or pfree one.
(This is similar to the way we were already handling TableAmRoutine
structs. This commit does fix one comment that was infelicitously
copied-and-pasted into tableamapi.c.)
This commit needs to be called out in the v19 release notes as an API
change for extension index AMs. An un-updated AM will still work
(as of now, anyway) but it risks memory leaks and will be slower than
necessary.
Author: Matthias van de Meent <boekewurm+postgres@gmail.com>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/CAEoWx2=vApYk2LRu8R0DdahsPNEhWUxGBZ=rbZo1EXE=uA+opQ@mail.gmail.com
Masahiko Sawada [Tue, 30 Dec 2025 21:12:10 +0000 (13:12 -0800)]
Add dead items memory usage to VACUUM (VERBOSE) and autovacuum logs.
This commit adds the total memory allocated during vacuum, the number
of times the dead items storage was reset, and the configured memory
limit. This helps users understand how much memory VACUUM required,
and such information can be used to avoid multiple index scans.
Reviewed-by: Masahiko Sawada <sawada.mshk@gmail.com>
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/CAHza6qcPitBCkyiKJosDTt3bmxMvzZOTONoebwCkBZrr3rk65Q%40mail.gmail.com
Masahiko Sawada [Tue, 30 Dec 2025 18:56:30 +0000 (10:56 -0800)]
Fix a race condition in updating procArray->replication_slot_xmin.
Previously, ReplicationSlotsComputeRequiredXmin() computed the oldest
xmin across all slots without holding ProcArrayLock (when
already_locked is false), acquiring the lock just before updating the
replication slot xmin.
This could lead to a race condition: if a backend created a new slot
and updates the global replication slot xmin, another backend
concurrently running ReplicationSlotsComputeRequiredXmin() could
overwrite that update with an invalid or stale value. This happens
because the concurrent backend might have computed the aggregate xmin
before the new slot was accounted for, but applied the update after
the new slot had already updated the global value.
In the reported failure, a walsender for an apply worker computed
InvalidTransactionId as the oldest xmin and overwrote a valid
replication slot xmin value computed by a walsender for a tablesync
worker. Consequently, the tablesync worker computed a transaction ID
via GetOldestSafeDecodingTransactionId() effectively without
considering the replication slot xmin. This led to the error "cannot
build an initial slot snapshot as oldest safe xid %u follows
snapshot's xmin %u", which was an assertion failure prior to commit
240e0dbacd3.
To fix this, we acquire ReplicationSlotControlLock in exclusive mode
during slot creation to perform the initial update of the slot
xmin. In ReplicationSlotsComputeRequiredXmin(), we hold
ReplicationSlotControlLock in shared mode until the global slot xmin
is updated in ProcArraySetReplicationSlotXmin(). This prevents
concurrent computations and updates of the global xmin by other
backends during the initial slot xmin update process, while still
permitting concurrent calls to ReplicationSlotsComputeRequiredXmin().
Backpatch to all supported versions.
Author: Zhijie Hou <houzj.fnst@fujitsu.com>
Reviewed-by: Masahiko Sawada <sawada.mshk@gmail.com>
Reviewed-by: Amit Kapila <amit.kapila16@gmail.com>
Reviewed-by: Pradeep Kumar <spradeepkumar29@gmail.com>
Reviewed-by: Hayato Kuroda (Fujitsu) <kuroda.hayato@fujitsu.com>
Reviewed-by: Robert Haas <robertmhaas@gmail.com>
Reviewed-by: Andres Freund <andres@anarazel.de>
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Discussion: https://postgr.es/m/CAA4eK1L8wYcyTPxNzPGkhuO52WBGoOZbT0A73Le=ZUWYAYmdfw@mail.gmail.com
Backpatch-through: 14
Michael Paquier [Tue, 30 Dec 2025 07:42:21 +0000 (16:42 +0900)]
Fix comment in lsyscache.c
Author: Chao Li <li.evan.chao@gmail.com>
Discussion: https://postgr.es/m/CAEoWx2miv0KGcM9j29ANRN45-Vz-2qAqrM0cv9OtaLx8e_WCMQ@mail.gmail.com
Thomas Munro [Tue, 30 Dec 2025 03:39:19 +0000 (16:39 +1300)]
jit: Drop redundant LLVM configure probes.
We currently require LLVM 14, so these probes for LLVM 9 functions
always succeeded. Even when the features aren't enabled in an LLVM
build, dummy functions are defined (a problem for a later commit).
The whole PGAC_CHECK_LLVM_FUNCTIONS macro and Meson equivalent are
removed, because we switched to testing LLVM_VERSION_MAJOR at compile
time in subsequent work and these were the last holdouts. That suits
the nature of LLVM API evolution better, and also allows for strictly
mechanical pruning in future commits like
820b5af7 and
972c2cd2. They
advanced the minimum LLVM version but failed to spot these.
Reviewed-by: Matheus Alcantara <matheusssilv97@gmail.com>
Reviewed-by: Andres Freund <andres@anarazel.de>
Discussion: https://postgr.es/m/CA%2BhUKGJgB6gvrdDohgwLfCwzVQm%3DVMtb9m0vzQn%3DCwWn-kwG9w%40mail.gmail.com
Michael Paquier [Tue, 30 Dec 2025 06:38:50 +0000 (15:38 +0900)]
Add pg_get_multixact_stats()
This new function exposes at SQL level some information related to
multixacts, not available until now. This data is useful for monitoring
purposes, especially for workloads that make a heavy use of multixacts:
- num_mxids, number of MultiXact IDs in use.
- num_members, number of member entries in use.
- members_size, bytes used by num_members in pg_multixact/members/.
- oldest_multixact: oldest MultiXact still needed.
This patch has been originally proposed when MultiXactOffset was still
32 bits, to monitor wraparound. This part is not relevant anymore since
bd8d9c9bdfa0 that has widen MultiXactOffset to 64 bits. The monitoring
of disk space usage for the members is still relevant.
Some tests are added to check this function, in the shape of one
isolation test with concurrent transactions that take a ROW SHARE lock,
and some SQL tests for pg_read_all_stats. Some documentation is added
to explain some patterns that can come from the information provided by
the function.
Bump catalog version.
Author: Naga Appani <nagnrik@gmail.com>
Reviewed-by: Ashutosh Bapat <ashutosh.bapat.oss@gmail.com>
Reviewed-by: Michael Paquier <michael@paquier.xyz>
Reviewed-by: Atsushi Torikoshi <torikoshia@oss.nttdata.com>
Discussion: https://postgr.es/m/CA+QeY+AAsYK6WvBW4qYzHz4bahHycDAY_q5ECmHkEV_eB9ckzg@mail.gmail.com
Michael Paquier [Tue, 30 Dec 2025 05:13:40 +0000 (14:13 +0900)]
Add MultiXactOffsetStorageSize() to multixact_internal.h
This function calculates in bytes the storage taken between two
multixact offsets. This will be used in an upcoming patch, introduced
separately here as this piece can be useful on its own.
Author: Naga Appani <nagnrik@gmail.com>
Co-authored-by: Michael Paquier <michael@paquier.xyz>
Discussion: https://postgr.es/m/aUyTvZMq2CLgNEB4@paquier.xyz
Michael Paquier [Tue, 30 Dec 2025 05:03:49 +0000 (14:03 +0900)]
Change GetMultiXactInfo() to return the next multixact offset
This routine returned a number of members as a MultiXactOffset,
calculated based on the difference between the next-to-be-assigned
offset and the oldest offset. However, this number is not actually an
offset but a number.
This type confusion comes from the original implementation of
MultiXactMemberFreezeThreshold(), in
53bb309d2d5a. The number of
members is now defined as a uint64, large enough for MultiXactOffset.
This change will be used in a follow-up patch.
Reviewed-by: Naga Appani <nagnrik@gmail.com>
Discussion: https://postgr.es/m/aUyTvZMq2CLgNEB4@paquier.xyz