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Release notes for 15.4, 14.9, 13.12, 12.16, 11.21.

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Tom Lane 2023-08-05 16:47:05 -04:00
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<!-- doc/src/sgml/release-11.sgml -->
<!-- See header comment in release.sgml about typical markup -->
<sect1 id="release-11-21">
<title>Release 11.21</title>
<formalpara>
<title>Release date:</title>
<para>2023-08-10</para>
</formalpara>
<para>
This release contains a variety of fixes from 11.20.
For information about new features in major release 11, see
<xref linkend="release-11"/>.
</para>
<para>
The <productname>PostgreSQL</productname> community will stop
releasing updates for the 11.X release series in November 2023.
Users are encouraged to update to a newer release branch soon.
</para>
<sect2>
<title>Migration to Version 11.21</title>
<para>
A dump/restore is not required for those running 11.X.
</para>
<para>
However, if you use BRIN indexes, it may be advisable to reindex them;
see the first changelog entry below.
</para>
<para>
Also, if you are upgrading from a version earlier than 11.14,
see <xref linkend="release-11-14"/>.
</para>
</sect2>
<sect2>
<title>Changes</title>
<itemizedlist>
<listitem>
<!--
Author: Tomas Vondra <tomas.vondra@postgresql.org>
Branch: master Release: REL_16_BR [3581cbdcd] 2023-05-19 01:29:44 +0200
Branch: REL_15_STABLE [e18769323] 2023-05-19 00:15:13 +0200
Branch: REL_14_STABLE [40d465caf] 2023-05-19 00:15:00 +0200
Branch: REL_13_STABLE [6c512fc6e] 2023-05-19 00:14:05 +0200
Branch: REL_12_STABLE [d78a66d92] 2023-05-19 00:16:13 +0200
Branch: REL_11_STABLE [fc7dc728d] 2023-05-19 00:21:05 +0200
Branch: master Release: REL_16_BR [3ec8a3bfb] 2023-05-18 23:33:23 +0200
Branch: REL_15_STABLE [80f64b900] 2023-05-18 23:33:45 +0200
Branch: REL_14_STABLE [3f1356e5d] 2023-05-18 23:34:10 +0200
Branch: REL_13_STABLE [2b1ab28b9] 2023-05-18 23:34:35 +0200
Branch: REL_12_STABLE [d42ffda68] 2023-05-18 23:34:56 +0200
Branch: REL_11_STABLE [b511d7323] 2023-05-18 23:35:16 +0200
-->
<para>
Fix confusion between empty (no rows) ranges and all-NULL ranges in
BRIN indexes, as well as incorrect merging of all-NULL summaries
(Tomas Vondra)
</para>
<para>
Each of these oversights could result in forgetting that a BRIN
index range contains any NULL values, potentially allowing
subsequent queries that should return NULL values to miss doing so.
</para>
<para>
This fix will not in itself correct faulty BRIN entries.
It's recommended to <command>REINDEX</command> any BRIN indexes that
may be used to search for nulls.
</para>
</listitem>
<listitem>
<!--
Author: Andres Freund <andres@anarazel.de>
Branch: master [c66a7d75e] 2023-07-13 13:03:28 -0700
Branch: REL_16_STABLE [a4b4cc1d6] 2023-07-13 13:03:30 -0700
Branch: REL_15_STABLE [f66403749] 2023-07-13 13:04:45 -0700
Branch: REL_14_STABLE [d11efe830] 2023-07-13 13:03:33 -0700
Branch: REL_13_STABLE [81ce00006] 2023-07-13 13:03:34 -0700
Branch: REL_12_STABLE [034a9fcd2] 2023-07-13 13:03:36 -0700
Branch: REL_11_STABLE [1c38e7ae1] 2023-07-13 13:03:37 -0700
-->
<para>
Avoid leaving a corrupted database behind when <command>DROP
DATABASE</command> is interrupted (Andres Freund)
</para>
<para>
If <command>DROP DATABASE</command> was interrupted after it had
already begun taking irreversible steps, the target database
remained accessible (because the removal of
its <structname>pg_database</structname> row would roll back),
but it would have corrupt contents. Fix by marking the database
as inaccessible before we begin to perform irreversible operations.
A failure after that will leave the database still partially
present, but nothing can be done with it except to issue
another <command>DROP DATABASE</command>.
</para>
</listitem>
<listitem>
<!--
Author: Michael Paquier <michael@paquier.xyz>
Branch: master [cfc43aeb3] 2023-06-30 13:54:48 +0900
Branch: REL_16_STABLE [f4691e2e7] 2023-06-30 13:54:53 +0900
Branch: REL_15_STABLE [cb4ac3e56] 2023-06-30 13:54:55 +0900
Branch: REL_14_STABLE [663b35f2d] 2023-06-30 13:54:56 +0900
Branch: REL_13_STABLE [537b70b82] 2023-06-30 13:54:59 +0900
Branch: REL_12_STABLE [dbe0e5c56] 2023-06-30 13:55:02 +0900
Branch: REL_11_STABLE [c75c33de5] 2023-06-30 13:55:07 +0900
-->
<para>
Ensure that partitioned indexes are correctly marked as valid or not
at creation (Michael Paquier)
</para>
<para>
If a new partitioned index matches an existing but invalid index on
one of the partitions, the partitioned index could end up being
marked valid prematurely. This could lead to misbehavior or
assertion failures in subsequent queries on the partitioned table.
</para>
</listitem>
<listitem>
<!--
Author: Michael Paquier <michael@paquier.xyz>
Branch: master Release: REL_16_BR [fc55c7ff8] 2023-06-28 15:57:31 +0900
Branch: REL_15_STABLE [7aa17b498] 2023-06-28 15:57:43 +0900
Branch: REL_14_STABLE [6160e221d] 2023-06-28 15:57:48 +0900
Branch: REL_13_STABLE [f42844069] 2023-06-28 15:57:51 +0900
Branch: REL_12_STABLE [63b292e73] 2023-06-28 15:57:53 +0900
Branch: REL_11_STABLE [e90e9275f] 2023-06-28 15:57:55 +0900
-->
<para>
Ignore invalid child indexes when matching partitioned indexes to
child indexes during <command>ALTER TABLE ATTACH PARTITION</command>
(Michael Paquier)
</para>
<para>
Such an index will now be ignored, and a new child index created
instead.
</para>
</listitem>
<listitem>
<!--
Author: Michael Paquier <michael@paquier.xyz>
Branch: master [38ea6aa90] 2023-07-14 10:12:48 +0900
Branch: REL_16_STABLE [31f9d41d6] 2023-07-14 10:13:14 +0900
Branch: REL_15_STABLE [c0dc97c7b] 2023-07-14 10:13:15 +0900
Branch: REL_14_STABLE [954cc2139] 2023-07-14 10:13:17 +0900
Branch: REL_13_STABLE [c89d74c18] 2023-07-14 10:13:20 +0900
Branch: REL_12_STABLE [f1d6bcdd8] 2023-07-14 10:13:21 +0900
Branch: REL_11_STABLE [ed2b58c15] 2023-07-14 10:13:22 +0900
-->
<para>
Fix possible failure when marking a partitioned index valid after
all of its partitions have been attached (Michael Paquier)
</para>
<para>
The update of the index's <structname>pg_index</structname> entry
could use stale data for other columns. One reported symptom is
an <quote>attempted to update invisible tuple</quote> error.
</para>
</listitem>
<listitem>
<!--
Author: Michael Paquier <michael@paquier.xyz>
Branch: master [bd5ddbe86] 2023-07-10 09:40:07 +0900
Branch: REL_16_STABLE [55c95f24c] 2023-07-10 09:40:12 +0900
Branch: REL_15_STABLE [d1e0f408c] 2023-07-10 09:40:14 +0900
Branch: REL_14_STABLE [235e716bc] 2023-07-10 09:40:15 +0900
Branch: REL_13_STABLE [f5b075adc] 2023-07-10 09:40:17 +0900
Branch: REL_12_STABLE [02021f1b2] 2023-07-10 09:40:22 +0900
Branch: REL_11_STABLE [914e72e6e] 2023-07-10 09:40:24 +0900
-->
<para>
Fix <command>ALTER EXTENSION SET SCHEMA</command> to complain if the
extension contains any objects outside the extension's schema
(Michael Paquier, Heikki Linnakangas)
</para>
<para>
Erroring out if the extension contains objects in multiple schemas
was always intended; but the check was mis-coded so that it would
fail to detect some cases, leading to surprising behavior.
</para>
</listitem>
<listitem>
<!--
Author: David Rowley <drowley@postgresql.org>
Branch: master Release: REL_16_BR [7fcd7ef2a] 2023-06-19 13:00:42 +1200
Branch: REL_15_STABLE [8f2ec8cc7] 2023-06-19 13:01:29 +1200
Branch: REL_14_STABLE [73f1c17fc] 2023-06-19 13:01:58 +1200
Branch: REL_13_STABLE [06286f8a2] 2023-06-19 13:02:24 +1200
Branch: REL_12_STABLE [dcef5b052] 2023-06-19 13:02:52 +1200
Branch: REL_11_STABLE [f6345f03f] 2023-06-19 13:03:17 +1200
-->
<para>
Don't use partial unique indexes for uniqueness proofs in the
planner (David Rowley)
</para>
<para>
This could give rise to incorrect plans, since the presumed
uniqueness of rows read from a table might not hold if the index in
question isn't used to scan the table.
</para>
</listitem>
<listitem>
<!--
Author: Etsuro Fujita <efujita@postgresql.org>
Branch: master [6f80a8d9c] 2023-07-28 15:45:00 +0900
Branch: REL_16_STABLE [695f5deb7] 2023-07-28 15:45:01 +0900
Branch: REL_15_STABLE [d1ef5631e] 2023-07-28 15:45:02 +0900
Branch: REL_14_STABLE [b0e390e6d] 2023-07-28 15:45:04 +0900
Branch: REL_13_STABLE [730f983ef] 2023-07-28 15:45:06 +0900
Branch: REL_12_STABLE [9edf72aa7] 2023-07-28 15:45:08 +0900
Branch: REL_11_STABLE [db01f2696] 2023-07-28 15:45:09 +0900
-->
<para>
Avoid producing incorrect plans for foreign joins with
pseudoconstant join clauses (Etsuro Fujita)
</para>
<para>
The planner currently lacks support for attaching pseudoconstant
join clauses to a pushed-down remote join, so disable generation
of remote joins in such cases. (A better solution will require
ABI-breaking changes of planner data structures, so it will have to
wait for a future major release.)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master Release: REL_16_BR [792213f2e] 2023-06-13 15:58:43 -0400
Branch: REL_15_STABLE [cc6974df1] 2023-06-13 15:58:37 -0400
Branch: REL_14_STABLE [d1423c52e] 2023-06-13 15:58:37 -0400
Branch: REL_13_STABLE [a36d0014f] 2023-06-13 15:58:37 -0400
Branch: REL_12_STABLE [b4110bdbf] 2023-06-13 15:58:37 -0400
Branch: REL_11_STABLE [13192a324] 2023-06-13 15:58:37 -0400
-->
<para>
Correctly handle sub-SELECTs in RLS policy expressions and
security-barrier views when expanding rule actions (Tom Lane)
</para>
</listitem>
<listitem>
<!--
Author: Thomas Munro <tmunro@postgresql.org>
Branch: master [126552c85] 2023-07-04 09:07:31 +1200
Branch: REL_16_STABLE [12529028a] 2023-07-04 09:04:35 +1200
Branch: REL_15_STABLE [d34aa0a2f] 2023-07-04 09:10:37 +1200
Branch: REL_14_STABLE [fb663f387] 2023-07-04 09:14:16 +1200
Branch: REL_13_STABLE [fc1547384] 2023-07-04 09:20:55 +1200
Branch: REL_12_STABLE [255a925d3] 2023-07-04 09:21:33 +1200
Branch: REL_11_STABLE [13f127800] 2023-07-04 09:40:30 +1200
Branch: master [bcc93a389] 2023-07-04 09:07:31 +1200
Branch: REL_16_STABLE [d03d9a261] 2023-07-04 09:04:35 +1200
Branch: REL_15_STABLE [ab265e985] 2023-07-04 09:10:37 +1200
Branch: REL_14_STABLE [3f7d3a77e] 2023-07-04 09:14:16 +1200
Branch: REL_13_STABLE [8976ac5c5] 2023-07-04 09:20:55 +1200
Branch: REL_12_STABLE [17b8887c2] 2023-07-04 09:21:33 +1200
Branch: REL_11_STABLE [814f3c8e4] 2023-07-04 09:40:30 +1200
Branch: master [f9b7fc651] 2023-07-04 09:07:31 +1200
Branch: REL_16_STABLE [0cb1fb2c9] 2023-07-04 09:04:35 +1200
Branch: REL_15_STABLE [0f275b0ee] 2023-07-04 09:10:37 +1200
Branch: REL_14_STABLE [ae6d536ed] 2023-07-04 09:14:16 +1200
Branch: REL_13_STABLE [8f705d7b9] 2023-07-04 09:20:55 +1200
Branch: REL_12_STABLE [fe88497b4] 2023-07-04 09:21:33 +1200
Branch: REL_11_STABLE [0048c3b51] 2023-07-04 09:27:00 +1200
-->
<para>
Fix race conditions in conflict detection
for <literal>SERIALIZABLE</literal> isolation mode
(Thomas Munro)
</para>
<para>
Conflicts could be missed when using bitmap heap scans, when using
GIN indexes, and when examining an initially-empty btree index.
All these cases could lead to serializability failures due to
improperly allowing conflicting transactions to commit.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master Release: REL_16_BR [43af714de] 2023-06-29 10:19:10 -0400
Branch: REL_15_STABLE [cc8cca3c2] 2023-06-29 10:19:10 -0400
Branch: REL_14_STABLE [0789b82a9] 2023-06-29 10:19:10 -0400
Branch: REL_13_STABLE [d0ab203bc] 2023-06-29 10:19:10 -0400
Branch: REL_12_STABLE [53b93e853] 2023-06-29 10:19:10 -0400
Branch: REL_11_STABLE [7f11b7a9c] 2023-06-29 10:19:10 -0400
-->
<para>
Fix intermittent failures when trying to update a field of a
composite column (Tom Lane)
</para>
<para>
If the overall value of the composite column is wide enough to
require out-of-line toasting, then an unluckily-timed cache flush
could cause errors or server crashes.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master Release: REL_16_BR [691594acd] 2023-06-24 17:18:08 -0400
Branch: REL_15_STABLE [a77d90171] 2023-06-24 17:18:08 -0400
Branch: REL_14_STABLE [4c61afa47] 2023-06-24 17:18:08 -0400
Branch: REL_13_STABLE [b6ab18a99] 2023-06-24 17:18:08 -0400
Branch: REL_12_STABLE [3b4580f5c] 2023-06-24 17:18:08 -0400
Branch: REL_11_STABLE [c7f33a197] 2023-06-24 17:18:08 -0400
-->
<para>
Prevent stack-overflow crashes with very complex text search
patterns (Tom Lane)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [38df84c65] 2023-07-27 11:56:35 -0400
Branch: REL_16_STABLE [de3f0e3fe] 2023-07-27 11:56:35 -0400
Branch: REL_15_STABLE [313ceda2f] 2023-07-27 12:07:48 -0400
Branch: REL_14_STABLE [341996248] 2023-07-27 12:07:48 -0400
Branch: REL_13_STABLE [288b4288c] 2023-07-27 12:07:48 -0400
Branch: REL_12_STABLE [0660f74e8] 2023-07-27 12:07:48 -0400
Branch: REL_11_STABLE [1d031ad54] 2023-07-27 12:07:48 -0400
-->
<para>
Allow tokens up to 10240 bytes long
in <filename>pg_hba.conf</filename>
and <filename>pg_ident.conf</filename> (Tom Lane)
</para>
<para>
The previous limit of 256 bytes has been found insufficient for some
use-cases.
</para>
</listitem>
<listitem>
<!--
Author: Heikki Linnakangas <heikki.linnakangas@iki.fi>
Branch: master [4f4d73466] 2023-07-05 13:13:13 +0300
Branch: REL_16_STABLE [dc0b58417] 2023-07-05 13:25:59 +0300
Branch: REL_15_STABLE [fa96a74a0] 2023-07-05 13:13:30 +0300
Branch: REL_14_STABLE [bfb493dba] 2023-07-05 13:13:35 +0300
Branch: REL_13_STABLE [59c2a6fe9] 2023-07-05 13:13:39 +0300
Branch: REL_12_STABLE [162aa47c3] 2023-07-05 13:14:24 +0300
Branch: REL_11_STABLE [2316ff1ae] 2023-07-05 13:14:33 +0300
-->
<para>
Fix mishandling of C++ out-of-memory conditions (Heikki Linnakangas)
</para>
<para>
If JIT is in use, running out of memory in a
C++ <function>new</function> call would lead to
a <productname>PostgreSQL</productname> FATAL error, instead of the
expected C++ exception.
</para>
</listitem>
<listitem>
<!--
Author: Thomas Munro <tmunro@postgresql.org>
Branch: master [03f80daac] 2023-07-04 15:16:47 +1200
Branch: REL_16_STABLE [af8f9ec66] 2023-07-04 15:21:36 +1200
Branch: REL_15_STABLE [9ffb10f18] 2023-07-04 15:24:42 +1200
Branch: REL_14_STABLE [b7ec66731] 2023-07-04 15:26:42 +1200
Branch: REL_13_STABLE [a0003572f] 2023-07-04 15:28:29 +1200
Branch: REL_12_STABLE [74ad9b0d1] 2023-07-04 15:29:41 +1200
Branch: REL_11_STABLE [1605623ec] 2023-07-04 16:13:12 +1200
-->
<para>
Avoid losing track of possibly-useful shared memory segments when a
page free results in coalescing ranges of free space (Dongming Liu)
</para>
<para>
Ensure that the segment is moved into the
appropriate <quote>bin</quote> for its new amount of free space, so
that it will be found by subsequent searches.
</para>
</listitem>
<listitem>
<!--
Author: Peter Geoghegan <pg@bowt.ie>
Branch: master Release: REL_16_BR [5f0762f14] 2023-06-21 17:41:58 -0700
Branch: REL_15_STABLE [642bec1f8] 2023-06-21 17:41:56 -0700
Branch: REL_14_STABLE [63fa0deb3] 2023-06-21 17:41:54 -0700
Branch: REL_13_STABLE [b6311824f] 2023-06-21 17:41:52 -0700
Branch: REL_12_STABLE [355917c07] 2023-06-21 17:41:50 -0700
Branch: REL_11_STABLE [7ddba19eb] 2023-06-21 17:41:48 -0700
Branch: master Release: REL_16_BR [5abff197c] 2023-05-25 15:33:00 -0700
Branch: REL_15_STABLE [6983a5112] 2023-05-25 15:32:57 -0700
Branch: REL_14_STABLE [322c9b340] 2023-05-25 15:32:53 -0700
Branch: REL_13_STABLE [8f876d15c] 2023-05-25 15:32:50 -0700
Branch: REL_12_STABLE [188dad680] 2023-05-25 15:32:48 -0700
Branch: REL_11_STABLE [a72b503ca] 2023-05-25 15:32:45 -0700
-->
<para>
Allow <command>VACUUM</command> to continue after detecting certain
types of b-tree index corruption (Peter Geoghegan)
</para>
<para>
If an invalid sibling-page link is detected, log the issue and press
on, rather than throwing an error as before. Nothing short
of <command>REINDEX</command> will fix the broken index, but
preventing <command>VACUUM</command> from completing until that is
done risks making matters far worse.
</para>
</listitem>
<listitem>
<!--
Author: Andres Freund <andres@anarazel.de>
Branch: master [83ecfa9fa] 2023-07-13 13:03:28 -0700
Branch: REL_16_STABLE [03ccc9569] 2023-07-13 13:03:30 -0700
Branch: REL_15_STABLE [82e97b864] 2023-07-13 13:03:31 -0700
Branch: REL_14_STABLE [e246fd423] 2023-07-13 13:03:33 -0700
Branch: REL_13_STABLE [53336e8f6] 2023-07-13 13:03:34 -0700
Branch: REL_12_STABLE [7aec84e4c] 2023-07-13 13:03:36 -0700
Branch: REL_11_STABLE [1386f0987] 2023-07-13 13:03:37 -0700
-->
<para>
Ensure that <varname>WrapLimitsVacuumLock</varname> is released
after <command>VACUUM</command> detects invalid data
in <structname>pg_database</structname>.<structfield>datfrozenxid</structfield>
or <structname>pg_database</structname>.<structfield>datminmxid</structfield>
(Andres Freund)
</para>
<para>
Failure to release this lock could lead to a deadlock later,
although the lock would be cleaned up if the session exits or
encounters some other error.
</para>
</listitem>
<listitem>
<!--
Author: Michael Paquier <michael@paquier.xyz>
Branch: master [cb0cca188] 2023-07-18 13:43:44 +0900
Branch: REL_16_STABLE [f88bc9f38] 2023-07-18 13:44:27 +0900
Branch: REL_15_STABLE [a878eff6b] 2023-07-18 13:44:29 +0900
Branch: REL_14_STABLE [442749100] 2023-07-18 13:44:31 +0900
Branch: REL_13_STABLE [db59108a2] 2023-07-18 13:44:33 +0900
Branch: REL_12_STABLE [d2ee542a2] 2023-07-18 13:44:34 +0900
Branch: REL_11_STABLE [bc0581f8f] 2023-07-18 13:44:35 +0900
Branch: master [4e465aac3] 2023-07-18 14:04:31 +0900
Branch: REL_16_STABLE [926aa6d11] 2023-07-18 14:04:46 +0900
Branch: REL_15_STABLE [f6ecd2622] 2023-07-18 14:04:48 +0900
Branch: REL_14_STABLE [763d26205] 2023-07-18 14:04:50 +0900
Branch: REL_13_STABLE [b3ca4f0a5] 2023-07-18 14:04:51 +0900
Branch: REL_12_STABLE [410a0d6bd] 2023-07-18 14:04:52 +0900
Branch: REL_11_STABLE [6c7bffc09] 2023-07-18 14:04:54 +0900
-->
<para>
Avoid double replay of prepared transactions during crash
recovery (suyu.cmj, Michael Paquier)
</para>
<para>
After a crash partway through a checkpoint with some two-phase
transaction state data already flushed to disk by this checkpoint,
crash recovery could attempt to replay the prepared transaction(s)
twice, leading to a fatal error such as <quote>lock is already
held</quote> in the startup process.
</para>
</listitem>
<listitem>
<!--
Author: Heikki Linnakangas <heikki.linnakangas@iki.fi>
Branch: master [4b4798e13] 2023-07-04 17:57:03 +0300
Branch: REL_16_STABLE [d431644b4] 2023-07-04 18:04:27 +0300
Branch: REL_15_STABLE [e24c02e4d] 2023-07-04 18:07:27 +0300
Branch: REL_14_STABLE [d85bf0719] 2023-07-04 18:07:46 +0300
Branch: REL_13_STABLE [acc8cdff4] 2023-07-04 18:08:08 +0300
Branch: REL_12_STABLE [1b4f1c6f8] 2023-07-04 18:08:26 +0300
Branch: REL_11_STABLE [6377f705c] 2023-07-04 18:08:40 +0300
-->
<para>
Ensure that a newly created, but still empty table
is <function>fsync</function>'ed at the next checkpoint (Heikki
Linnakangas)
</para>
<para>
Without this, if there is an operating system crash causing the
empty file to disappear, subsequent operations on the table might
fail with <quote>could not open file</quote> errors.
</para>
</listitem>
<listitem>
<!--
Author: Heikki Linnakangas <heikki.linnakangas@iki.fi>
Branch: master [3142a8845] 2023-07-06 17:25:29 +0300
Branch: REL_16_STABLE [bf7b70e6b] 2023-07-06 17:28:50 +0300
Branch: REL_15_STABLE [25624c5d3] 2023-07-06 17:29:12 +0300
Branch: REL_14_STABLE [32f327f68] 2023-07-06 17:29:13 +0300
Branch: REL_13_STABLE [c50b869ed] 2023-07-06 17:29:14 +0300
Branch: REL_12_STABLE [80abec387] 2023-07-06 17:29:15 +0300
Branch: REL_11_STABLE [988719b88] 2023-07-06 17:29:16 +0300
-->
<para>
Ensure that creation of the init fork of an unlogged index is
WAL-logged (Heikki Linnakangas)
</para>
<para>
While an unlogged index's main data fork is not WAL-logged, its init
fork should be, to ensure that we have a consistent state to restore
the index to after a crash. This step was missed if the init fork
contains no data, which is a case not used by any standard index AM;
but perhaps some extension behaves that way.
</para>
</listitem>
<listitem>
<!--
Author: Michael Paquier <michael@paquier.xyz>
Branch: REL_14_STABLE [c6043fcbb] 2023-06-11 10:33:46 +0900
Branch: REL_13_STABLE [37236ca06] 2023-06-11 10:33:56 +0900
Branch: REL_12_STABLE [9920552e1] 2023-06-11 10:33:59 +0900
Branch: REL_11_STABLE [a9c3472e0] 2023-06-11 10:34:00 +0900
-->
<para>
Fix missing reinitializations of delay-checkpoint-end flags
(suyu.cmj)
</para>
<para>
This could result in unnecessary delays of checkpoints, or in
assertion failures in assert-enabled builds.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master Release: REL_16_BR [555b929bb] 2023-06-21 11:07:24 -0400
Branch: REL_15_STABLE [cb74f7bec] 2023-06-21 11:07:11 -0400
Branch: REL_14_STABLE [120ea65b8] 2023-06-21 11:07:11 -0400
Branch: REL_13_STABLE [d1fc0f382] 2023-06-21 11:07:11 -0400
Branch: REL_12_STABLE [a98a04005] 2023-06-21 11:07:11 -0400
Branch: REL_11_STABLE [a8be2356c] 2023-06-21 11:07:11 -0400
-->
<para>
Avoid assertion failure when processing an empty statement via the
extended query protocol in an already-aborted transaction (Tom Lane)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master Release: REL_16_BR [1d369c9e9] 2023-05-16 10:53:42 -0400
Branch: REL_15_STABLE [eaf99e4c4] 2023-05-16 10:53:42 -0400
Branch: REL_14_STABLE [ccd362325] 2023-05-16 10:53:42 -0400
Branch: REL_13_STABLE [0409c7fc7] 2023-05-16 10:53:42 -0400
Branch: REL_12_STABLE [0966291a4] 2023-05-16 10:53:42 -0400
Branch: REL_11_STABLE [8084bf9a4] 2023-05-16 10:53:42 -0400
-->
<para>
Fix <filename>contrib/fuzzystrmatch</filename>'s
Soundex <function>difference()</function> function to handle empty
input sanely (Alexander Lakhin, Tom Lane)
</para>
<para>
An input string containing no alphabetic characters resulted in
unpredictable output.
</para>
</listitem>
<listitem>
<!--
Author: Michael Paquier <michael@paquier.xyz>
Branch: master Release: REL_16_BR [d522b05c8] 2023-06-12 09:14:03 +0900
Branch: REL_15_STABLE [3a5222a43] 2023-06-12 09:14:13 +0900
Branch: REL_14_STABLE [e0e682945] 2023-06-12 09:14:14 +0900
Branch: REL_13_STABLE [78bf0a256] 2023-06-12 09:14:17 +0900
Branch: REL_12_STABLE [edf1de65e] 2023-06-12 09:14:19 +0900
Branch: REL_11_STABLE [bbfc26d86] 2023-06-12 09:14:20 +0900
-->
<para>
Tighten whitespace checks in <filename>contrib/hstore</filename>
input (Evan Jones)
</para>
<para>
In some cases, characters would be falsely recognized as whitespace
and hence discarded.
</para>
</listitem>
<listitem>
<!--
Author: Michael Paquier <michael@paquier.xyz>
Branch: master Release: REL_16_BR [c00fbe89d] 2023-06-15 13:45:34 +0900
Branch: REL_15_STABLE [4be308ede] 2023-06-15 13:45:38 +0900
Branch: REL_14_STABLE [019a40d61] 2023-06-15 13:45:40 +0900
Branch: REL_13_STABLE [ae9aac64a] 2023-06-15 13:45:41 +0900
Branch: REL_12_STABLE [6ecc1c02a] 2023-06-15 13:45:42 +0900
Branch: REL_11_STABLE [ab40b0395] 2023-06-15 13:45:44 +0900
-->
<para>
Disallow oversize input arrays
with <filename>contrib/intarray</filename>'s
<literal>gist__int_ops</literal> index opclass (Ankit Kumar Pandey,
Alexander Lakhin)
</para>
<para>
Previously this code would report a <literal>NOTICE</literal> but
press on anyway, creating an invalid index entry that presents a
risk of crashes when the index is read.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [8aac9759b] 2023-07-13 13:07:51 -0400
Branch: REL_16_STABLE [e27f3f52c] 2023-07-13 13:08:08 -0400
Branch: REL_15_STABLE [5cb461989] 2023-07-13 13:08:17 -0400
Branch: REL_14_STABLE [a6991f763] 2023-07-13 13:08:23 -0400
Branch: REL_13_STABLE [7fffcc2ee] 2023-07-13 13:08:28 -0400
Branch: REL_12_STABLE [8d8f37149] 2023-07-13 13:08:33 -0400
Branch: REL_11_STABLE [9f70f6d4c] 2023-07-13 13:08:40 -0400
-->
<para>
Avoid useless double decompression of GiST index entries
in <filename>contrib/intarray</filename> (Konstantin Knizhnik,
Matthias van de Meent, Tom Lane)
</para>
</listitem>
<listitem>
<!--
Author: Michael Paquier <michael@paquier.xyz>
Branch: master [a5ea825f9] 2023-07-14 11:15:34 +0900
Branch: REL_16_STABLE [27da47122] 2023-07-14 11:16:03 +0900
Branch: REL_15_STABLE [eb3abec4b] 2023-07-14 11:16:06 +0900
Branch: REL_14_STABLE [7af65523a] 2023-07-14 11:16:08 +0900
Branch: REL_13_STABLE [bdaaf1bf1] 2023-07-14 11:16:10 +0900
Branch: REL_12_STABLE [7d27493b7] 2023-07-14 11:16:11 +0900
Branch: REL_11_STABLE [db9813819] 2023-07-14 11:16:13 +0900
-->
<para>
Ensure
that <structname>pg_index</structname>.<structfield>indisreplident</structfield>
is kept up-to-date in relation cache entries (Shruthi Gowda)
</para>
<para>
This value could be stale in some cases. There is no core code that
relies on the relation cache's copy, so this is only a latent bug as
far as Postgres itself is concerned; but there may be extensions for
which it is a live bug.
</para>
</listitem>
<listitem>
<!--
Author: Peter Eisentraut <peter@eisentraut.org>
Branch: REL_13_STABLE [8aa9a2623] 2023-06-24 20:22:57 +0900
Branch: REL_12_STABLE [265c9138d] 2023-06-24 20:26:56 +0900
Branch: REL_11_STABLE [96f96398d] 2023-06-24 20:29:42 +0900
-->
<para>
Silence deprecation warnings when compiling with OpenSSL 3.0.0 or
later (Peter Eisentraut)
</para>
</listitem>
</itemizedlist>
</sect2>
</sect1>
<sect1 id="release-11-20">
<title>Release 11.20</title>