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Release notes for 12.3, 11.8, 10.13, 9.6.18, 9.5.22.

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<!-- doc/src/sgml/release-9.6.sgml --> <!-- doc/src/sgml/release-9.6.sgml -->
<!-- See header comment in release.sgml about typical markup --> <!-- See header comment in release.sgml about typical markup -->
<sect1 id="release-9-6-18">
<title>Release 9.6.18</title>
<formalpara>
<title>Release date:</title>
<para>2020-05-14</para>
</formalpara>
<para>
This release contains a variety of fixes from 9.6.17.
For information about new features in the 9.6 major release, see
<xref linkend="release-9-6">.
</para>
<sect2>
<title>Migration to Version 9.6.18</title>
<para>
A dump/restore is not required for those running 9.6.X.
</para>
<para>
However, if you are upgrading from a version earlier than 9.6.16,
see <xref linkend="release-9-6-16">.
</para>
</sect2>
<sect2>
<title>Changes</title>
<itemizedlist>
<listitem>
<!--
Author: Michael Paquier <michael@paquier.xyz>
Branch: master [a40caf5f8] 2020-04-06 11:03:49 +0900
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<para>
Preserve the <structfield>indisclustered</structfield> setting of
indexes rewritten by <command>ALTER TABLE</command> (Amit Langote,
Justin Pryzby)
</para>
<para>
Previously, <command>ALTER TABLE</command> lost track of which index
had been used for <command>CLUSTER</command>.
</para>
</listitem>
<listitem>
<!--
Author: Peter Eisentraut <peter@eisentraut.org>
Branch: master [1cc9c2412] 2020-03-13 11:57:06 +0100
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Branch: REL9_5_STABLE [c15d35041] 2020-03-13 13:21:30 +0100
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<para>
Preserve the replica identity properties of indexes rewritten
by <command>ALTER TABLE</command> (Quan Zongliang, Peter Eisentraut)
</para>
</listitem>
<listitem>
<!--
Author: Alvaro Herrera <alvherre@alvh.no-ip.org>
Branch: master [5be594caf] 2020-05-06 12:29:41 -0400
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<para>
Lock objects sooner during <command>DROP OWNED BY</command>
(&Aacute;lvaro Herrera)
</para>
<para>
This avoids failures in race-condition cases where another session is
deleting some of the same objects.
</para>
</listitem>
<listitem>
<!--
Author: Andrew Gierth <rhodiumtoad@postgresql.org>
Branch: master [d9a4cce29] 2020-04-25 05:09:30 +0100
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<para>
Fix error-case processing for <command>CREATE ROLE ... IN
ROLE</command> (Andrew Gierth)
</para>
<para>
Some error cases would be reported as <quote>unexpected node
type</quote> or the like, instead of the intended message.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [e81e5741a] 2020-04-27 12:21:04 -0400
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<para>
Fix full text search to handle NOT above a phrase search correctly
(Tom Lane)
</para>
<para>
Queries such as <literal>!(foo&lt;-&gt;bar)</literal> failed to find
matching rows when implemented as a GiST or GIN index search.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [db89f0e3a] 2020-05-07 15:59:51 -0400
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<para>
Fix full text search for cases where a phrase search includes an
item with both prefix matching and a weight restriction (Tom Lane)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [c9b0c678d] 2020-04-09 13:19:23 -0400
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<para>
Fix <function>ts_headline()</function> to make better headline
selections when working with phrase queries (Tom Lane)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [e41955faf] 2020-04-03 13:15:45 -0400
Branch: REL_12_STABLE [05f4a8818] 2020-04-03 13:15:30 -0400
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<para>
Fix bugs in <varname>gin_fuzzy_search_limit</varname> processing
(Ad&eacute; Heyward, Tom Lane)
</para>
<para>
A small value of <varname>gin_fuzzy_search_limit</varname> could
result in unexpected slowness due to unintentionally rescanning the
same index page many times. Another code path failed to apply the
intended filtering at all, possibly returning too many values.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [41a194f49] 2020-04-07 20:50:28 -0400
Branch: REL_12_STABLE [35d1eefb2] 2020-04-07 20:50:02 -0400
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<para>
Allow input of type <type>circle</type> to accept the format
<quote><literal>(<replaceable>x</replaceable>,<replaceable>y</replaceable>),<replaceable>r</replaceable></literal></quote>
as the documentation says it does (David Zhang)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [26a944cf2] 2020-04-07 15:57:58 -0400
Branch: REL_12_STABLE [6e6b74a20] 2020-04-07 16:30:55 -0400
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<para>
Make the <function>get_bit()</function>
and <function>set_bit()</function> functions cope
with <type>bytea</type> strings longer than 256MB (Movead Li)
</para>
<para>
Since the bit number argument is only <type>int4</type>, it's
impossible to use these functions to access bits beyond the first
256MB of a long <type>bytea</type>. We'll widen the argument
to <type>int8</type> in v13, but in the meantime, allow these
functions to work on the initial substring of a
long <type>bytea</type>.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [085b6b667] 2020-03-11 15:27:59 -0400
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<para>
Avoid possibly leaking an open-file descriptor for a directory
in <function>pg_ls_dir()</function>,
<function>pg_timezone_names()</function>,
<function>pg_tablespace_databases()</function>, and allied functions
(Justin Pryzby)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [4dbcb3f84] 2020-03-14 14:42:22 -0400
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<para>
Fix polymorphic-function type resolution to correctly infer the
actual type of an <type>anyarray</type> output when given only
an <type>anyrange</type> input (Tom Lane)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [d12bdba77] 2020-04-21 15:58:42 -0400
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<para>
Avoid unlikely crash when <command>REINDEX</command> is terminated
by a session-shutdown signal (Tom Lane)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [5c27bce7f] 2020-04-11 12:29:06 -0400
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<para>
Prevent printout of possibly-incorrect hash join table statistics
in <command>EXPLAIN</command> (Konstantin Knizhnik, Tom Lane, Thomas
Munro)
</para>
</listitem>
<listitem>
<!--
Author: Fujii Masao <fujii@postgresql.org>
Branch: master [007491979] 2020-02-19 20:37:26 +0900
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<para>
Fix reporting of elapsed time for heap truncation steps
in <command>VACUUM VERBOSE</command> (Tatsuhito Kasahara)
</para>
</listitem>
<listitem>
<!--
Author: Fujii Masao <fujii@postgresql.org>
Branch: master [17d3fcdc3] 2020-03-10 00:14:43 +0900
Branch: REL_12_STABLE [82c04e483] 2020-03-10 00:15:25 +0900
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<para>
Avoid possibly showing <quote>waiting</quote> twice in a process's
PS status (Masahiko Sawada)
</para>
</listitem>
<listitem>
<!--
Author: Michael Paquier <michael@paquier.xyz>
Branch: master [4e87c4836] 2020-04-24 08:48:28 +0900
Branch: REL_12_STABLE [22db5269b] 2020-04-24 08:48:35 +0900
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<para>
Avoid premature recycling of WAL segments during crash recovery
(Jehan-Guillaume de Rorthais)
</para>
<para>
WAL segments that become ready to be archived during crash recovery
were potentially recycled without being archived.
</para>
</listitem>
<listitem>
<!--
Author: Fujii Masao <fujii@postgresql.org>
Branch: master [4bd0ad9e4] 2020-04-08 00:49:29 +0900
Branch: REL_12_STABLE [683e0ef55] 2020-05-09 12:00:27 +0900
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<para>
Avoid scanning irrelevant timelines during archive recovery (Kyotaro
Horiguchi)
</para>
<para>
This can eliminate many attempts to fetch non-existent WAL files from
archive storage, which is helpful if archive access is slow.
</para>
</listitem>
<listitem>
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Author: Amit Kapila <akapila@postgresql.org>
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<para>
Remove bogus <quote>subtransaction logged without previous top-level
txn record</quote> error check in logical decoding (Arseny Sher,
Amit Kapila)
</para>
<para>
This condition is legitimately reachable in various scenarios, so
remove the check.
</para>
</listitem>
<listitem>
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Author: Peter Eisentraut <peter@eisentraut.org>
Branch: master [49bf81536] 2020-03-26 13:29:20 +0100
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<para>
Ensure that a replication
slot's <literal>io_in_progress_lock</literal> is released in failure
code paths (Pavan Deolasee)
</para>
<para>
This could result in a walsender later becoming stuck waiting for
the lock.
</para>
</listitem>
<listitem>
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Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [f332241a6] 2020-04-18 14:02:44 -0400
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<para>
Fix race conditions in synchronous standby management (Tom Lane)
</para>
<para>
During a change in the <varname>synchronous_standby_names</varname>
setting, there was a window in which wrong decisions could be made
about whether it is OK to release transactions that are waiting for
synchronous commit. Another hazard for similarly wrong decisions
existed if a walsender process exited and was immediately replaced
by another.
</para>
</listitem>
<listitem>
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Author: Thomas Munro <tmunro@postgresql.org>
Branch: REL_11_STABLE [a493f9334] 2020-03-12 18:06:54 +1300
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<para>
Ensure <varname>nextXid</varname> can't go backwards on a standby
server (Eka Palamadai)
</para>
<para>
This race condition could allow incorrect hot standby feedback
messages to be sent back to the primary server, potentially allowing
<command>VACUUM</command> to run too soon on the primary.
</para>
</listitem>
<listitem>
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Author: Amit Kapila <akapila@postgresql.org>
Branch: master [b4f140869] 2020-03-18 09:27:14 +0530
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<para>
Add missing SQLSTATE values to a few error reports (Sawada Masahiko)
</para>
</listitem>
<listitem>
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Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [761a5688b] 2020-02-19 14:45:17 -0500
Branch: REL_12_STABLE [32aa14d40] 2020-02-19 14:44:58 -0500
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<para>
Fix PL/pgSQL to reliably refuse to execute an event trigger function
as a plain function (Tom Lane)
</para>
</listitem>
<listitem>
<!--
Author: Michael Paquier <michael@paquier.xyz>
Branch: master [27dbe1a18] 2020-04-22 07:27:03 +0900
Branch: REL_12_STABLE [e1c08722a] 2020-04-22 07:27:45 +0900
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Branch: REL9_5_STABLE [e5e295d50] 2020-04-22 07:28:04 +0900
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<para>
Fix memory leak in <application>libpq</application> when
using <literal>sslmode=verify-full</literal> (Roman Peshkurov)
</para>
<para>
Certificate verification during connection startup could leak some
memory. This would become an issue if a client process opened many
database connections during its lifetime.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [980a70b97] 2020-03-23 11:58:00 -0400
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<para>
Fix <application>ecpg</application> to treat an argument of
just <quote><literal>-</literal></quote> as meaning <quote>read
from stdin</quote> on all platforms (Tom Lane)
</para>
</listitem>
<listitem>
<!--
Author: Alvaro Herrera <alvherre@alvh.no-ip.org>
Branch: master [b08dee24a] 2020-03-11 16:54:54 -0300
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Branch: master [899a04f5e] 2020-03-11 11:04:59 -0300
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<para>
Add <application>pg_dump</application> support for <command>ALTER
... DEPENDS ON EXTENSION</command> (&Aacute;lvaro Herrera)
</para>
<para>
<application>pg_dump</application> previously ignored dependencies added
this way, causing them to be forgotten during dump/restore or
<application>pg_upgrade</application>.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [f31364676] 2020-02-17 18:40:02 -0500
Branch: REL_12_STABLE [6da7d3630] 2020-02-17 18:40:02 -0500
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<para>
Fix <application>pg_dump</application> to dump comments on RLS
policy objects (Tom Lane)
</para>
</listitem>
<listitem>
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Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [8728b2c70] 2020-03-09 14:58:26 -0400
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Branch: master [a9d70c108] 2020-04-08 11:23:39 -0400
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<para>
In <application>pg_dump</application>, postpone restore of event
triggers till the end (Fabr&iacute;zio de Royes Mello, Hamid Akhtar,
Tom Lane)
</para>
<para>
This minimizes the risk that an event trigger could interfere with
the restoration of other objects.
</para>
</listitem>
<listitem>
<!--
Author: Michael Paquier <michael@paquier.xyz>
Branch: master [008cf0409] 2020-02-27 11:20:46 +0900
Branch: REL_12_STABLE [943affb3d] 2020-02-27 11:21:00 +0900
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Branch: REL_11_STABLE [8e076f4f9] 2020-02-27 21:58:50 +0900
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<para>
Fix quoting of <option>--encoding</option>, <option>--lc-ctype</option>
and <option>--lc-collate</option> values
in <application>createdb</application> utility (Michael Paquier)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [6dd9f3577] 2020-04-03 11:24:56 -0400
Branch: REL_12_STABLE [d56657c35] 2020-04-03 11:24:56 -0400
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<para>
<filename>contrib/lo</filename>'s <function>lo_manage()</function>
function crashed if called directly rather than as a trigger (Tom
Lane)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [95f7ddfda] 2020-03-28 17:09:51 -0400
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<para>
In <filename>contrib/ltree</filename>,
protect against overflow of <type>ltree</type>
and <type>lquery</type> length fields (Nikita Glukhov)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [fc576b7c4] 2020-04-16 14:45:54 -0400
Branch: REL_12_STABLE [687e566b9] 2020-04-16 14:45:54 -0400
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<para>
Fix cache reference leak in <filename>contrib/sepgsql</filename>
(Michael Luo)
</para>
</listitem>
<listitem>
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Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [8c49454ca] 2020-03-30 11:14:58 -0400
Branch: REL_12_STABLE [de5b9db36] 2020-03-30 11:14:58 -0400
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<para>
Avoid failures when dealing with Unix-style locale names on
Windows (Juan Jos&eacute; Santamar&iacute;a Flecha)
</para>
</listitem>
<listitem>
<!--
Author: Michael Paquier <michael@paquier.xyz>
Branch: master [beb2516e9] 2020-05-06 21:08:15 +0900
Branch: REL_12_STABLE [8c0939dad] 2020-05-06 21:08:22 +0900
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<para>
In MSVC builds, cope with spaces in the path name for Python
(Victor Wagner)
</para>
</listitem>
<listitem>
<!--
Author: Andrew Dunstan <andrew@dunslane.net>
Branch: master [a9659fb65] 2020-04-17 14:44:33 -0400
Branch: REL_12_STABLE [6b02bee66] 2020-04-17 14:52:42 -0400
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<para>
In MSVC builds, fix detection of Visual Studio version to work with
more language settings (Andrew Dunstan)
</para>
</listitem>
<listitem>
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Author: Andrew Dunstan <andrew@dunslane.net>
Branch: master [71c2fd0c0] 2020-03-20 13:55:15 -0400
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<para>
In MSVC builds, use <literal>-Wno-deprecated</literal> with bison
versions newer than 3.0, as non-Windows builds already do (Andrew
Dunstan)
</para>
</listitem>
<listitem>
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Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [4cac3a49e] 2020-04-24 10:54:47 -0400
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Branch: master [bd8c5cee9] 2020-04-24 17:21:44 -0400
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<para>
Update time zone data files to <application>tzdata</application>
release 2020a for DST law changes in Morocco and the Canadian Yukon,
plus historical corrections for Shanghai.
</para>
<para>
The America/Godthab zone has been renamed to America/Nuuk to reflect
current English usage; however, the old name remains available as a
compatibility link.
</para>
<para>
Also, update <application>initdb</application>'s list of known
Windows time zone names to include recent additions, improving the
odds that it will correctly translate the system time zone setting
on that platform.
</para>
</listitem>
</itemizedlist>
</sect2>
</sect1>
<sect1 id="release-9-6-17"> <sect1 id="release-9-6-17">
<title>Release 9.6.17</title> <title>Release 9.6.17</title>