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Release notes for 17.2, 16.6, 15.10, 14.15, 13.18, 12.22.

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<!-- doc/src/sgml/release-16.sgml -->
<!-- See header comment in release.sgml about typical markup -->
<sect1 id="release-16-6">
<title>Release 16.6</title>
<formalpara>
<title>Release date:</title>
<para>2024-11-21</para>
</formalpara>
<para>
This release contains a few fixes from 16.5.
For information about new features in major release 16, see
<xref linkend="release-16"/>.
</para>
<sect2 id="release-16-6-migration">
<title>Migration to Version 16.6</title>
<para>
A dump/restore is not required for those running 16.X.
</para>
<para>
However, if you are upgrading from a version earlier than 16.5,
see <xref linkend="release-16-5"/>.
</para>
</sect2>
<sect2 id="release-16-6-changes">
<title>Changes</title>
<itemizedlist>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: REL_17_STABLE [6bfacd368] 2024-11-16 12:58:26 -0500
Branch: REL_16_STABLE [ee33d5847] 2024-11-16 12:58:26 -0500
Branch: REL_15_STABLE [17db248f3] 2024-11-16 12:58:26 -0500
Branch: REL_14_STABLE [099e711b7] 2024-11-16 12:58:26 -0500
-->
<para>
Repair ABI break for extensions that work with
struct <structname>ResultRelInfo</structname> (Tom Lane)
<ulink url="&commit_baseurl;ee33d5847">&sect;</ulink>
</para>
<para>
Last week's minor releases unintentionally broke binary
compatibility with <application>timescaledb</application> and
several other extensions. Restore the affected structure to its
previous size, so that such extensions need not be rebuilt.
</para>
</listitem>
<listitem>
<!--
Author: Noah Misch <noah@leadboat.com>
Branch: master [7b88529f4] 2024-11-15 20:39:56 -0800
Branch: REL_17_STABLE [1c05004a8] 2024-11-15 20:39:59 -0800
Branch: REL_16_STABLE [b0918c128] 2024-11-15 20:39:59 -0800
Branch: REL_15_STABLE [edf80895f] 2024-11-15 20:39:59 -0800
Branch: REL_14_STABLE [be062bfa5] 2024-11-15 20:40:00 -0800
Branch: REL_13_STABLE [07c6e0f61] 2024-11-15 20:40:00 -0800
Branch: REL_12_STABLE [c46333865] 2024-11-15 20:40:00 -0800
-->
<para>
Restore functionality of <command>ALTER {ROLE|DATABASE} SET
role</command> (Tom Lane, Noah Misch)
<ulink url="&commit_baseurl;b0918c128">&sect;</ulink>
</para>
<para>
The fix for CVE-2024-10978 accidentally caused settings
for <varname>role</varname> to not be applied if they come from
non-interactive sources, including previous <command>ALTER
{ROLE|DATABASE}</command> commands and
the <varname>PGOPTIONS</varname> environment variable.
</para>
</listitem>
<listitem>
<!--
Author: Masahiko Sawada <msawada@postgresql.org>
Branch: master [e5ed873b1] 2024-11-15 17:06:11 -0800
Branch: REL_17_STABLE [568e78a65] 2024-11-15 17:06:08 -0800
Branch: REL_16_STABLE [f35391133] 2024-11-15 17:06:05 -0800
Branch: REL_15_STABLE [91771b3fb] 2024-11-15 17:06:02 -0800
Branch: REL_14_STABLE [26c4e8968] 2024-11-15 17:06:00 -0800
Branch: REL_13_STABLE [15dc1abb1] 2024-11-15 17:05:57 -0800
-->
<para>
Fix cases where a logical replication
slot's <structfield>restart_lsn</structfield> could go backwards
(Masahiko Sawada)
<ulink url="&commit_baseurl;f35391133">&sect;</ulink>
</para>
<para>
Previously, restarting logical replication could sometimes cause the
slot's restart point to be recomputed as an older value than had
previously been advertised
in <structname>pg_replication_slots</structname>. This is bad,
since for example WAL files might have been removed on the basis of
the later <structfield>restart_lsn</structfield> value, in which
case replication would fail to restart.
</para>
</listitem>
<listitem>
<!--
Author: Álvaro Herrera <alvherre@alvh.no-ip.org>
Branch: master [90bcc7c2d] 2024-11-15 12:53:12 +0100
Branch: REL_17_STABLE [cb844d66b] 2024-11-15 12:53:12 +0100
Branch: REL_16_STABLE [ea1649c35] 2024-11-15 12:53:12 +0100
Branch: REL_15_STABLE [e28cf2fbc] 2024-11-15 12:53:12 +0100
Branch: REL_14_STABLE [ba2535841] 2024-11-15 12:53:12 +0100
-->
<para>
Avoid deleting still-needed WAL files
during <application>pg_rewind</application>
(Polina Bungina, Alexander Kukushkin)
<ulink url="&commit_baseurl;ea1649c35">&sect;</ulink>
</para>
<para>
Previously, in unlucky cases, it was possible
for <application>pg_rewind</application> to remove important WAL
files from the rewound demoted primary. In particular this happens
if those files have been marked for archival (i.e.,
their <filename>.ready</filename> files were created) but not yet
archived. Then the newly promoted node no longer has such files
because of them having been recycled, but likely they are needed
for recovery in the demoted node.
If <application>pg_rewind</application> removes them, recovery is
not possible anymore.
</para>
</listitem>
<listitem>
<!--
Author: Michael Paquier <michael@paquier.xyz>
Branch: master [818119afc] 2024-11-15 11:31:58 +0900
Branch: REL_17_STABLE [1d6a03ea4] 2024-11-15 11:32:13 +0900
Branch: REL_16_STABLE [afa20845d] 2024-11-15 11:32:16 +0900
Branch: REL_15_STABLE [154c5b42a] 2024-11-15 11:32:18 +0900
-->
<para>
Fix race conditions associated with dropping shared statistics
entries (Kyotaro Horiguchi, Michael Paquier)
<ulink url="&commit_baseurl;afa20845d">&sect;</ulink>
</para>
<para>
These bugs could lead to loss of statistics data, assertion
failures, or <quote>can only drop stats once</quote> errors.
</para>
</listitem>
<listitem>
<!--
Author: Peter Geoghegan <pg@bowt.ie>
Branch: master [93063e2e4] 2024-11-12 20:57:45 -0500
Branch: REL_17_STABLE [7af6d1306] 2024-11-12 20:57:43 -0500
Branch: REL_16_STABLE [05aac2e83] 2024-11-12 20:57:41 -0500
Branch: REL_15_STABLE [16a2bb079] 2024-11-12 20:57:39 -0500
Branch: REL_14_STABLE [2a30b6836] 2024-11-12 20:57:37 -0500
Branch: REL_13_STABLE [e493ea866] 2024-11-12 20:57:35 -0500
-->
<para>
Count index scans in <filename>contrib/bloom</filename> indexes in
the statistics views, such as the
<structname>pg_stat_user_indexes</structname>.<structfield>idx_scan</structfield>
counter (Masahiro Ikeda)
<ulink url="&commit_baseurl;05aac2e83">&sect;</ulink>
</para>
</listitem>
<listitem>
<!--
Author: Alexander Korotkov <akorotkov@postgresql.org>
Branch: master [db22b9002] 2024-11-12 01:44:20 +0200
Branch: REL_17_STABLE [a6fa869cf] 2024-11-12 01:51:20 +0200
Branch: REL_16_STABLE [b242aba02] 2024-11-12 01:53:40 +0200
Branch: REL_15_STABLE [713b8546a] 2024-11-12 01:54:30 +0200
Branch: REL_14_STABLE [247e7647f] 2024-11-12 01:54:35 +0200
Branch: REL_13_STABLE [5411e8213] 2024-11-12 01:54:38 +0200
-->
<para>
Fix crash when checking to see if an index's opclass options have
changed (Alexander Korotkov)
<ulink url="&commit_baseurl;b242aba02">&sect;</ulink>
</para>
<para>
Some forms of <command>ALTER TABLE</command> would fail if the
table has an index with non-default operator class options.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [b69bdcee9] 2024-11-15 18:23:38 -0500
Branch: REL_17_STABLE [5f28e6ba7] 2024-11-15 18:23:38 -0500
Branch: REL_16_STABLE [b6312becc] 2024-11-15 18:23:38 -0500
Branch: REL_15_STABLE [2496c3f6f] 2024-11-15 18:23:38 -0500
Branch: REL_14_STABLE [2bdd3b248] 2024-11-15 18:23:38 -0500
-->
<para>
Avoid assertion failure caused by disconnected NFA sub-graphs in
regular expression parsing (Tom Lane)
<ulink url="&commit_baseurl;b6312becc">&sect;</ulink>
</para>
<para>
This bug does not appear to have any visible consequences in
non-assert builds.
</para>
</listitem>
</itemizedlist>
</sect2>
</sect1>
<sect1 id="release-16-5">
<title>Release 16.5</title>