<!-- doc/src/sgml/release-9.6.sgml -->
<!-- See header comment in release.sgml about typical markup -->
+ <sect1 id="release-9-6-21">
+ <title>Release 9.6.21</title>
+
+ <formalpara>
+ <title>Release date:</title>
+ <para>2021-02-11</para>
+ </formalpara>
+
+ <para>
+ This release contains a variety of fixes from 9.6.20.
+ For information about new features in the 9.6 major release, see
+ <xref linkend="release-9-6">.
+ </para>
+
+ <para>
+ The <productname>PostgreSQL</productname> community will stop
+ releasing updates for the 9.6.X release series in November 2021.
+ Users are encouraged to update to a newer release branch soon.
+ </para>
+
+ <sect2>
+ <title>Migration to Version 9.6.21</title>
+
+ <para>
+ A dump/restore is not required for those running 9.6.X.
+ </para>
+
+ <para>
+ However, see the first changelog item below,
+ which describes cases in which reindexing indexes after the upgrade
+ may be advisable.
+ </para>
+
+ <para>
+ Also, 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>
+<!--
+Branch: master [8a54e12a3] 2021-01-30 00:00:27 -0800
+Branch: REL_13_STABLE [86a5b309c] 2021-01-30 00:00:42 -0800
+Branch: REL_12_STABLE [be843ce29] 2021-01-30 00:01:56 -0800
+Branch: REL_11_STABLE [d1ab4bf6e] 2021-01-30 00:02:08 -0800
+Branch: REL_10_STABLE [179775135] 2021-01-30 00:02:11 -0800
+Branch: REL9_6_STABLE [d683d6528] 2021-01-30 00:04:05 -0800
+Branch: REL9_5_STABLE [77a0e14f0] 2021-01-30 00:05:34 -0800
+-->
+ <para>
+ Fix <command>CREATE INDEX CONCURRENTLY</command> to wait for
+ concurrent prepared transactions (Andrey Borodin)
+ </para>
+
+ <para>
+ At the point where <command>CREATE INDEX CONCURRENTLY</command>
+ waits for all concurrent transactions to complete so that it can see
+ rows they inserted, it must also wait for all prepared transactions
+ to complete, for the same reason. Its failure to do so meant that
+ rows inserted by prepared transactions might be omitted from the new
+ index, causing queries relying on the index to miss such rows.
+ In installations that have enabled prepared transactions
+ (<varname>max_prepared_transactions</varname> > 0),
+ it's recommended to reindex any concurrently-built indexes in
+ case this problem occurred when they were built.
+ </para>
+ </listitem>
+
+ <listitem>
+<!--
+Branch: master [a0efda88a] 2021-01-19 13:25:33 -0500
+Branch: REL_13_STABLE [188cd4f44] 2021-01-19 13:25:40 -0500
+Branch: REL_12_STABLE [625315996] 2021-01-19 13:25:45 -0500
+Branch: REL_11_STABLE [794562d07] 2021-01-19 13:25:49 -0500
+Branch: REL_10_STABLE [fac54bd5e] 2021-01-19 13:25:54 -0500
+Branch: REL9_6_STABLE [fe8edbb82] 2021-01-19 13:26:01 -0500
+Branch: REL9_5_STABLE [0ab177bec] 2021-01-19 13:26:05 -0500
+-->
+ <para>
+ Avoid incorrect results when <literal>WHERE CURRENT OF</literal> is
+ applied to a cursor whose plan contains a MergeAppend node (Tom
+ Lane)
+ </para>
+
+ <para>
+ This case is unsupported (in general, a cursor using <literal>ORDER
+ BY</literal> is not guaranteed to be simply updatable); but the code
+ previously did not reject it, and could silently give false matches.
+ </para>
+ </listitem>
+
+ <listitem>
+<!--
+Branch: master [60661bbf2] 2021-01-18 18:32:30 -0500
+Branch: REL_13_STABLE [f0f53195b] 2021-01-18 18:32:40 -0500
+Branch: REL_12_STABLE [ba80489c6] 2021-01-18 18:32:45 -0500
+Branch: REL_11_STABLE [de622e677] 2021-01-18 18:32:49 -0500
+Branch: REL_10_STABLE [5cd94de77] 2021-01-18 18:32:55 -0500
+Branch: REL9_6_STABLE [ffbf17463] 2021-01-18 18:33:02 -0500
+Branch: REL9_5_STABLE [33a46993f] 2021-01-18 18:33:07 -0500
+-->
+ <para>
+ Fix crash when <literal>WHERE CURRENT OF</literal> is applied to a
+ cursor whose plan contains a custom scan node (David Geier)
+ </para>
+ </listitem>
+
+ <listitem>
+<!--
+Branch: master [b1738ff6a] 2020-11-30 12:22:43 -0500
+Branch: REL_13_STABLE [666a4de93] 2020-11-30 12:22:43 -0500
+Branch: REL_12_STABLE [4f728a1f5] 2020-11-30 12:22:43 -0500
+Branch: REL_11_STABLE [caecab229] 2020-11-30 12:22:43 -0500
+Branch: REL_10_STABLE [785f4462d] 2020-11-30 12:22:43 -0500
+Branch: REL9_6_STABLE [ab4cbb4bc] 2020-11-30 12:22:43 -0500
+Branch: REL9_5_STABLE [8c5da2d51] 2020-11-30 12:22:43 -0500
+-->
+ <para>
+ Fix planner's handling of a placeholder that is computed at some
+ join level and used only at that same level (Tom Lane)
+ </para>
+
+ <para>
+ This oversight could lead to <quote>failed to build
+ any <replaceable>N</replaceable>-way joins</quote> planner errors.
+ </para>
+ </listitem>
+
+ <listitem>
+<!--
+Branch: master [660b89928] 2020-11-24 21:58:32 +0000
+Branch: REL_13_STABLE [6dda05704] 2020-11-24 21:16:58 +0000
+Branch: REL_12_STABLE [ae5aa26dc] 2020-11-24 21:17:02 +0000
+Branch: REL_11_STABLE [018e7d98d] 2020-11-24 21:18:37 +0000
+Branch: REL_10_STABLE [321c87e5c] 2020-11-24 21:18:59 +0000
+Branch: REL9_6_STABLE [6402afd98] 2020-11-24 21:19:50 +0000
+Branch: REL9_5_STABLE [59ed45e27] 2020-11-24 21:36:09 +0000
+-->
+ <para>
+ Be more careful about whether index AMs support mark/restore
+ (Andrew Gierth)
+ </para>
+
+ <para>
+ This prevents errors about missing support functions in rare edge
+ cases.
+ </para>
+ </listitem>
+
+ <listitem>
+<!--
+Branch: master [21378e1fe] 2021-01-20 11:38:17 +0900
+Branch: REL_13_STABLE [31e0f9d76] 2021-01-20 11:39:14 +0900
+Branch: REL_12_STABLE [5ad672fc2] 2021-01-20 11:39:17 +0900
+Branch: REL_11_STABLE [1c3a4d44d] 2021-01-20 11:39:21 +0900
+Branch: REL_10_STABLE [74ee3abcf] 2021-01-20 11:39:24 +0900
+Branch: REL9_6_STABLE [7dc3be9df] 2021-01-20 11:39:31 +0900
+Branch: REL9_5_STABLE [0ddb529cf] 2021-01-20 11:39:35 +0900
+-->
+ <para>
+ Fix <command>ALTER DEFAULT PRIVILEGES</command> to handle duplicated
+ arguments safely (Michael Paquier)
+ </para>
+
+ <para>
+ Duplicate role or schema names within the same command could lead
+ to <quote>tuple already updated by self</quote> errors or
+ unique-constraint violations.
+ </para>
+ </listitem>
+
+ <listitem>
+<!--
+Branch: master [08db7c63f] 2020-12-25 10:41:59 -0800
+Branch: REL_13_STABLE [9f8a48bb2] 2020-12-25 10:42:02 -0800
+Branch: REL_12_STABLE [c96698806] 2020-12-25 10:42:03 -0800
+Branch: REL_11_STABLE [e83e8509b] 2020-12-25 10:42:03 -0800
+Branch: REL_10_STABLE [d7c197f46] 2020-12-25 10:42:03 -0800
+Branch: REL9_6_STABLE [b81d3791e] 2020-12-25 10:42:04 -0800
+Branch: REL9_5_STABLE [90383a613] 2020-12-25 10:42:04 -0800
+Branch: REL_10_STABLE [d176b9d5e] 2020-12-25 11:02:56 -0800
+Branch: REL9_6_STABLE [3f920e876] 2020-12-25 11:03:05 -0800
+Branch: REL9_5_STABLE [14649bf50] 2020-12-25 11:06:23 -0800
+-->
+ <para>
+ Flush ACL-related caches when <structname>pg_authid</structname>
+ changes (Noah Misch)
+ </para>
+
+ <para>
+ This change ensures that permissions-related decisions will promptly
+ reflect the results of <command>ALTER ROLE ... [NO] INHERIT</command>.
+ </para>
+ </listitem>
+
+ <listitem>
+<!--
+Branch: master [f7f83a55b] 2020-12-01 14:02:27 -0500
+Branch: REL_13_STABLE [dffc82a5b] 2020-12-01 14:02:27 -0500
+Branch: REL_12_STABLE [5f9b05ada] 2020-12-01 14:02:28 -0500
+Branch: REL_11_STABLE [28bb8c496] 2020-12-01 14:02:28 -0500
+Branch: REL_10_STABLE [d98e27dc6] 2020-12-01 14:02:28 -0500
+Branch: REL9_6_STABLE [f00c44002] 2020-12-01 14:02:28 -0500
+Branch: REL9_5_STABLE [fb500296d] 2020-12-01 14:02:28 -0500
+-->
+ <para>
+ Prevent misprocessing of ambiguous <command>CREATE TABLE
+ LIKE</command> clauses (Tom Lane)
+ </para>
+
+ <para>
+ A <literal>LIKE</literal> clause is re-examined after initial
+ creation of the new table, to handle importation of indexes and
+ such. It was possible for this re-examination to find a different
+ table of the same name, causing unexpected behavior; one example is
+ where the new table is a temporary table of the same name as
+ the <literal>LIKE</literal> target.
+ </para>
+ </listitem>
+
+ <listitem>
+<!--
+Branch: master [97390fe8a] 2020-11-19 15:03:17 -0500
+Branch: REL_13_STABLE [98f3f1d5c] 2020-11-19 15:03:17 -0500
+Branch: REL_12_STABLE [87ab46421] 2020-11-19 15:03:17 -0500
+Branch: REL_11_STABLE [c690ebbef] 2020-11-19 15:03:17 -0500
+Branch: REL_10_STABLE [513db7b70] 2020-11-19 15:03:17 -0500
+Branch: REL9_6_STABLE [159b6775f] 2020-11-19 15:03:17 -0500
+Branch: REL9_5_STABLE [6631d5f26] 2020-11-19 15:03:17 -0500
+-->
+ <para>
+ Rearrange order of operations in <command>CREATE TABLE
+ LIKE</command> so that indexes are cloned before building foreign
+ key constraints (Tom Lane)
+ </para>
+
+ <para>
+ This fixes the case where a self-referential foreign key constraint
+ declared in the outer <command>CREATE TABLE</command> depends on an
+ index that's coming from the <literal>LIKE </literal> clause.
+ </para>
+ </listitem>
+
+ <listitem>
+<!--
+Branch: master [dd705a039] 2021-02-06 15:17:01 -0500
+Branch: REL_13_STABLE [4353bc878] 2021-02-06 15:17:01 -0500
+Branch: REL_12_STABLE [f73321957] 2021-02-06 15:17:01 -0500
+Branch: REL_11_STABLE [580069037] 2021-02-06 15:17:02 -0500
+Branch: REL_10_STABLE [ad85e5efa] 2021-02-06 15:17:02 -0500
+Branch: REL9_6_STABLE [7736ab05f] 2021-02-06 15:17:02 -0500
+Branch: REL9_5_STABLE [5ad03374b] 2021-02-06 15:17:02 -0500
+-->
+ <para>
+ Disallow converting an inheritance child table to a view
+ (Tom Lane)
+ </para>
+ </listitem>
+
+ <listitem>
+<!--
+Branch: master [9f35f9437] 2020-12-01 13:21:03 +1300
+Branch: REL_13_STABLE [fd3a75d82] 2020-12-01 13:22:01 +1300
+Branch: REL_12_STABLE [50f338574] 2020-12-01 13:37:00 +1300
+Branch: REL_11_STABLE [d5706ad7b] 2020-12-01 13:46:27 +1300
+Branch: REL_10_STABLE [22701755d] 2020-12-01 14:43:04 +1300
+Branch: REL9_6_STABLE [d0bbe2122] 2020-12-01 14:50:41 +1300
+Branch: REL9_5_STABLE [e00928de8] 2020-12-01 14:54:49 +1300
+-->
+ <para>
+ Ensure that disk space allocated for a dropped relation is released
+ promptly at commit (Thomas Munro)
+ </para>
+
+ <para>
+ Previously, if the dropped relation spanned multiple 1GB segments,
+ only the first segment was truncated immediately. Other segments
+ were simply unlinked, which doesn't authorize the kernel to release
+ the storage so long as any other backends still have the files open.
+ </para>
+ </listitem>
+
+ <listitem>
+<!--
+Branch: master [c444472af] 2021-02-05 11:14:56 +0200
+Branch: REL_13_STABLE [c87cbd51e] 2021-02-05 11:19:48 +0200
+Branch: REL_12_STABLE [9b0ce8957] 2021-02-05 11:16:33 +0200
+Branch: REL_11_STABLE [d9b4163c5] 2021-02-05 11:16:53 +0200
+Branch: REL_10_STABLE [c06632e48] 2021-02-05 11:17:07 +0200
+Branch: REL9_6_STABLE [e152ccc7f] 2021-02-05 11:17:13 +0200
+Branch: REL9_5_STABLE [aaf266157] 2021-02-05 11:17:27 +0200
+-->
+ <para>
+ Fix handling of backslash-escaped multibyte characters
+ in <command>COPY FROM</command> (Heikki Linnakangas)
+ </para>
+
+ <para>
+ A backslash followed by a multibyte character was not handled
+ correctly. In some client character encodings, this could lead to
+ misinterpreting part of a multibyte character as a field separator
+ or end-of-copy-data marker.
+ </para>
+ </listitem>
+
+ <listitem>
+<!--
+Branch: master [2cccb627f] 2020-11-18 12:39:15 +0200
+Branch: REL_13_STABLE [340ae3cfb] 2020-11-20 14:41:14 +0200
+Branch: REL_12_STABLE [888fa2bae] 2020-11-20 14:46:47 +0200
+Branch: REL_11_STABLE [57b5d8484] 2020-11-20 14:49:25 +0200
+Branch: REL_10_STABLE [1dbe627fd] 2020-11-20 14:49:42 +0200
+Branch: REL9_6_STABLE [02a2dbe91] 2020-11-20 14:57:15 +0200
+Branch: REL9_5_STABLE [ded7db4c1] 2020-11-20 14:57:51 +0200
+-->
+ <para>
+ Avoid preallocating executor hash tables
+ in <command>EXPLAIN</command> without <literal>ANALYZE</literal>
+ (Alexey Bashtanov)
+ </para>
+ </listitem>
+
+ <listitem>
+<!--
+Branch: master [9c83b54a9] 2020-11-28 14:03:40 -0500
+Branch: REL_13_STABLE [f5de090cc] 2020-11-28 14:03:40 -0500
+Branch: REL_12_STABLE [cbc7a7a10] 2020-11-28 14:03:40 -0500
+Branch: REL_11_STABLE [40f2fbe71] 2020-11-28 14:03:40 -0500
+Branch: REL_10_STABLE [f6324bbbe] 2020-11-28 14:03:40 -0500
+Branch: REL9_6_STABLE [8a4069766] 2020-11-28 14:03:40 -0500
+Branch: REL9_5_STABLE [60d6c7143] 2020-11-28 14:03:40 -0500
+-->
+ <para>
+ Fix recently-introduced race conditions
+ in <command>LISTEN</command>/<command>NOTIFY</command> queue
+ handling (Tom Lane)
+ </para>
+
+ <para>
+ A newly-listening backend could attempt to read SLRU pages that
+ were in process of being truncated, possibly causing an error.
+ </para>
+
+ <para>
+ The queue tail pointer could become
+ set to a value that's not equal to the queue position of any
+ backend, resulting in effective disabling of the queue truncation
+ logic. Continued use of <command>NOTIFY</command> then led to
+ queue-fill warnings, and eventually to inability to send any more
+ notifies until the server is restarted.
+ </para>
+ </listitem>
+
+ <listitem>
+<!--
+Branch: master [ff5d5611c] 2020-12-21 13:11:50 -0500
+Branch: REL_13_STABLE [38d30a14b] 2020-12-21 13:11:51 -0500
+Branch: REL_12_STABLE [38bef9e43] 2020-12-21 13:11:29 -0500
+Branch: REL_11_STABLE [75c8ef5ae] 2020-12-21 13:11:29 -0500
+Branch: REL_10_STABLE [542248f9d] 2020-12-21 13:11:30 -0500
+Branch: REL9_6_STABLE [1d5f3f976] 2020-12-21 13:11:30 -0500
+Branch: REL9_5_STABLE [edcdbc44e] 2020-12-21 13:11:30 -0500
+-->
+ <para>
+ Allow the <type>jsonb</type> concatenation operator to handle all
+ combinations of JSON data types (Tom Lane)
+ </para>
+
+ <para>
+ We can concatenate two JSON objects or two JSON arrays. Handle
+ other cases by wrapping non-array inputs in one-element arrays,
+ then performing an array concatenation. Previously, some
+ combinations of inputs followed this rule but others arbitrarily
+ threw an error.
+ </para>
+ </listitem>
+
+ <listitem>
+<!--
+Branch: master [afcc8772e] 2021-01-08 12:16:00 -0500
+Branch: REL_13_STABLE [49c928c0c] 2021-01-08 12:16:00 -0500
+Branch: REL_12_STABLE [8354371d0] 2021-01-08 12:16:00 -0500
+Branch: REL_11_STABLE [769908811] 2021-01-08 12:16:00 -0500
+Branch: REL_10_STABLE [2d540ac5f] 2021-01-08 12:16:00 -0500
+Branch: REL9_6_STABLE [085a1cfb3] 2021-01-08 12:16:00 -0500
+Branch: REL9_5_STABLE [0c23f30fa] 2021-01-08 12:16:00 -0500
+-->
+ <para>
+ Fix use of uninitialized value while parsing a <literal>*</literal>
+ quantifier in a BRE-mode regular expression (Tom Lane)
+ </para>
+
+ <para>
+ This error could cause the quantifier to act non-greedy, that is
+ behave like a <literal>*?</literal> quantifier would do in full
+ regular expressions.
+ </para>
+ </listitem>
+
+ <listitem>
+<!--
+Branch: master [bc43b7c2c] 2021-01-05 11:15:28 +0000
+Branch: REL_13_STABLE [e15c384d7] 2021-01-05 11:08:59 +0000
+Branch: REL_12_STABLE [258b77005] 2021-01-05 11:07:12 +0000
+Branch: REL_11_STABLE [160a9e425] 2021-01-05 11:05:58 +0000
+Branch: REL_10_STABLE [275b190b3] 2021-01-05 11:04:41 +0000
+Branch: REL9_6_STABLE [9a299dff2] 2021-01-05 11:02:46 +0000
+Branch: master [fead67c24] 2021-01-05 11:52:42 +0000
+Branch: REL_13_STABLE [5777b6ea2] 2021-01-05 11:51:21 +0000
+Branch: REL_12_STABLE [740780a61] 2021-01-05 11:50:11 +0000
+Branch: REL_11_STABLE [ab042d010] 2021-01-05 11:48:45 +0000
+Branch: REL_10_STABLE [0097193b1] 2021-01-05 11:46:44 +0000
+Branch: REL9_6_STABLE [f0b9bada5] 2021-01-05 11:45:17 +0000
+-->
+ <para>
+ Fix numeric <function>power()</function> for the case where the
+ exponent is exactly <literal>INT_MIN</literal> (-2147483648)
+ (Dean Rasheed)
+ </para>
+
+ <para>
+ Previously, a result with no significant digits was produced.
+ </para>
+ </listitem>
+
+ <listitem>
+<!--
+Branch: master [6db992833] 2021-01-16 12:21:35 -0800
+Branch: REL_13_STABLE [6eb3fc7fc] 2021-01-16 12:21:38 -0800
+Branch: REL_12_STABLE [66087f7e9] 2021-01-16 12:21:39 -0800
+Branch: REL_11_STABLE [677f6cb1d] 2021-01-16 12:21:39 -0800
+Branch: REL_10_STABLE [9afba9b0e] 2021-01-16 12:21:39 -0800
+Branch: REL9_6_STABLE [1a31d8c52] 2021-01-16 12:21:39 -0800
+Branch: REL9_5_STABLE [c424c75f5] 2021-01-16 12:21:39 -0800
+-->
+ <para>
+ Prevent possible data loss from incorrect detection of the
+ wraparound point of an SLRU log
+ (Noah Misch)
+ </para>
+
+ <para>
+ The wraparound point typically falls in the middle of a page, which
+ must be rounded off to a page boundary, and that was not done
+ correctly. No issue could arise unless an installation had gotten
+ to within one page of SLRU overflow, which is unlikely in a
+ properly-functioning system. If this did happen, it would manifest
+ in later <quote>apparent wraparound</quote> or <quote>could not
+ access status of transaction</quote> errors.
+ </para>
+ </listitem>
+
+ <listitem>
+<!--
+Branch: master [ee1b38f65] 2021-01-13 08:19:50 +0530
+Branch: REL_13_STABLE [0685c5c1b] 2021-01-13 08:31:45 +0530
+Branch: REL_12_STABLE [0b2ae3c92] 2021-01-13 08:40:06 +0530
+Branch: REL_11_STABLE [7adc408f4] 2021-01-13 08:50:13 +0530
+Branch: REL_10_STABLE [636b6f99c] 2021-01-13 09:01:57 +0530
+Branch: REL9_6_STABLE [f2b268ee0] 2021-01-13 09:12:59 +0530
+Branch: REL9_5_STABLE [4bccceaa9] 2021-01-13 09:22:03 +0530
+-->
+ <para>
+ Fix memory leak in walsender processes while sending new snapshots
+ for logical decoding (Amit Kapila)
+ </para>
+ </listitem>
+
+ <listitem>
+<!--
+Branch: master [a58db3aa1] 2020-12-14 23:47:30 -0800
+Branch: REL_13_STABLE [fde5f130c] 2020-12-14 23:48:44 -0800
+Branch: REL_12_STABLE [706d84fe7] 2020-12-14 23:48:04 -0800
+Branch: REL_11_STABLE [4ee058a3b] 2020-12-14 23:49:06 -0800
+Branch: REL_10_STABLE [ac7df6e8f] 2020-12-14 23:49:29 -0800
+Branch: REL9_6_STABLE [f10da1e9c] 2020-12-14 23:49:57 -0800
+Branch: REL9_5_STABLE [133a0906d] 2020-12-14 23:50:20 -0800
+-->
+ <para>
+ Fix walsender to accept additional commands after
+ terminating replication (Jeff Davis)
+ </para>
+ </listitem>
+
+ <listitem>
+<!--
+Branch: master [8900b5a9d] 2021-01-06 12:39:18 +0900
+Branch: REL_13_STABLE [0f8977b3f] 2021-01-06 12:30:37 +0900
+Branch: REL_12_STABLE [9f540f840] 2021-01-06 12:31:23 +0900
+Branch: REL_11_STABLE [e83771880] 2021-01-06 12:31:55 +0900
+Branch: REL_10_STABLE [4c20e78f1] 2021-01-06 12:32:32 +0900
+Branch: REL9_6_STABLE [0307b98d8] 2021-01-06 12:33:28 +0900
+-->
+ <para>
+ Ensure detection of deadlocks between hot standby backends and the
+ startup (WAL-application) process (Fujii Masao)
+ </para>
+
+ <para>
+ The startup process did not run the deadlock detection code, so that
+ in situations where the startup process is last to join a circular
+ wait situation, the deadlock might never be recognized.
+ </para>
+ </listitem>
+
+ <listitem>
+<!--
+Branch: master [6db27037b] 2020-12-23 12:51:22 +0900
+Branch: REL_13_STABLE [1e54664ee] 2020-12-23 12:51:35 +0900
+Branch: REL_12_STABLE [67a9411d2] 2020-12-23 12:51:39 +0900
+Branch: REL_11_STABLE [35ad5c7c7] 2020-12-23 12:51:42 +0900
+Branch: REL_10_STABLE [f3ee99df7] 2020-12-23 12:51:46 +0900
+Branch: REL9_6_STABLE [0b54a80a3] 2020-12-23 12:51:51 +0900
+-->
+ <para>
+ Fix portability problem in parsing
+ of <varname>recovery_target_xid</varname> values (Michael Paquier)
+ </para>
+
+ <para>
+ The target XID is potentially 64 bits wide, but it was parsed
+ with <function>strtoul()</function>, causing misbehavior on
+ platforms where <type>long</type> is 32 bits (such as Windows).
+ </para>
+ </listitem>
+
+ <listitem>
+<!--
+Branch: master [07d46fceb] 2021-01-25 13:03:43 -0500
+Branch: REL_13_STABLE [a26194f22] 2021-01-25 13:03:11 -0500
+Branch: REL_12_STABLE [4641b2a30] 2021-01-25 13:03:11 -0500
+Branch: REL_11_STABLE [a7cdd3f71] 2021-01-25 13:03:11 -0500
+Branch: REL_10_STABLE [d09e8789f] 2021-01-25 13:03:11 -0500
+Branch: REL9_6_STABLE [57a7d6f49] 2021-01-25 13:03:12 -0500
+Branch: REL9_5_STABLE [41309f716] 2021-01-25 13:03:12 -0500
+-->
+ <para>
+ Avoid assertion failure in <function>pg_get_functiondef()</function>
+ when examining a function with a <literal>TRANSFORM</literal> option
+ (Tom Lane)
+ </para>
+ </listitem>
+
+ <listitem>
+<!--
+Branch: master [7e5e1bba0] 2020-11-29 15:22:04 -0500
+Branch: REL_13_STABLE [72b930f50] 2020-11-29 15:22:04 -0500
+Branch: REL_12_STABLE [3958abdad] 2020-11-29 15:22:04 -0500
+Branch: REL_11_STABLE [777ac03a6] 2020-11-29 15:22:04 -0500
+Branch: REL_10_STABLE [946277fd4] 2020-11-29 15:22:04 -0500
+Branch: REL9_6_STABLE [3f59a05f0] 2020-11-29 15:22:04 -0500
+Branch: REL9_5_STABLE [e2d5de150] 2020-11-29 15:22:04 -0500
+-->
+ <para>
+ In <application>psql</application>, re-allow including a password
+ in a <replaceable>connection_string</replaceable> argument of a
+ <command>\connect</command> command (Tom Lane)
+ </para>
+
+ <para>
+ This used to work, but a recent bug fix caused the password to be
+ ignored (resulting in prompting for a password).
+ </para>
+ </listitem>
+
+ <listitem>
+<!--
+Branch: master [f76a85000] 2021-01-26 13:04:52 -0500
+Branch: REL_13_STABLE [64bdb6e5f] 2021-01-26 13:04:52 -0500
+Branch: REL_12_STABLE [82f97d33f] 2021-01-26 13:04:52 -0500
+Branch: REL_11_STABLE [3fa7b9078] 2021-01-26 13:04:52 -0500
+Branch: REL_10_STABLE [564cb2579] 2021-01-26 13:04:52 -0500
+Branch: REL9_6_STABLE [2c2e134b7] 2021-01-26 13:04:52 -0500
+Branch: REL9_5_STABLE [131825cd5] 2021-01-26 13:04:52 -0500
+-->
+ <para>
+ Fix assorted bugs
+ in <application>psql</application>'s <command>\help</command>
+ command (Kyotaro Horiguchi, Tom Lane)
+ </para>
+
+ <para>
+ <command>\help</command> with two argument words failed to find a
+ command description using only the first word, for
+ example <literal>\help reset all</literal> should show the help
+ for <command>RESET</command> but did not.
+ Also, <command>\help</command> often failed to invoke the pager when
+ it should. It also leaked memory.
+ </para>
+ </listitem>
+
+ <listitem>
+<!--
+Branch: master [f713ff7c6] 2021-01-16 12:21:35 -0800
+Branch: REL_13_STABLE [b8daf894f] 2021-01-16 12:21:38 -0800
+Branch: REL_12_STABLE [a0d31b1c9] 2021-01-16 12:21:39 -0800
+Branch: REL_11_STABLE [c6ff165f9] 2021-01-16 12:21:39 -0800
+Branch: REL_10_STABLE [b933c9c0b] 2021-01-16 12:21:39 -0800
+Branch: REL9_6_STABLE [ad2b7c9bb] 2021-01-16 12:21:39 -0800
+-->
+ <para>
+ Fix <application>pg_dump</application> to handle <literal>WITH
+ GRANT OPTION</literal> in an extension's initial privileges
+ (Noah Misch)
+ </para>
+
+ <para>
+ If an extension's script creates an object and grants privileges
+ on it with grant option, then later the user revokes such
+ privileges, <application>pg_dump</application> would generate
+ incorrect SQL for reproducing the situation. (Few if any extensions
+ do this today.)
+ </para>
+ </listitem>
+
+ <listitem>
+<!--
+Branch: master [2b4f31303] 2020-12-03 15:57:48 +0200
+Branch: REL_13_STABLE [abd0abfb7] 2020-12-03 15:57:52 +0200
+Branch: REL_12_STABLE [020f153db] 2020-12-03 15:57:54 +0200
+Branch: REL_11_STABLE [63e316f0b] 2020-12-03 15:57:57 +0200
+Branch: REL_10_STABLE [8b5c353ec] 2020-12-03 15:58:00 +0200
+Branch: REL9_6_STABLE [0740857de] 2020-12-03 15:58:02 +0200
+Branch: REL9_5_STABLE [81e3c868f] 2020-12-03 15:58:06 +0200
+Branch: master [36a4ac20f] 2020-12-04 18:26:46 +0200
+Branch: REL_13_STABLE [e41a2efbc] 2020-12-04 18:24:34 +0200
+Branch: REL_12_STABLE [ad3fb04b9] 2020-12-04 18:24:57 +0200
+Branch: REL_11_STABLE [cda50f211] 2020-12-04 18:25:12 +0200
+Branch: REL_10_STABLE [45d363145] 2020-12-04 18:25:23 +0200
+Branch: REL9_6_STABLE [a075c84f2] 2020-12-04 18:25:45 +0200
+Branch: REL9_5_STABLE [1dd608bba] 2020-12-04 18:25:54 +0200
+Branch: master [6ba581cf1] 2020-12-07 14:50:20 +0200
+Branch: REL_13_STABLE [e6dc04d43] 2020-12-07 14:50:37 +0200
+Branch: REL_12_STABLE [98f8cdd48] 2020-12-07 14:55:22 +0200
+Branch: REL_11_STABLE [10d9c9d03] 2020-12-07 14:55:23 +0200
+Branch: REL_10_STABLE [d137b14c3] 2020-12-07 14:55:25 +0200
+Branch: REL9_6_STABLE [3ea8e660c] 2020-12-07 14:55:27 +0200
+Branch: REL9_5_STABLE [beb6b45ab] 2020-12-07 14:55:28 +0200
+-->
+ <para>
+ In <application>pg_rewind</application>, ensure that all WAL is
+ accounted for when rewinding a standby server
+ (Ian Barwick, Heikki Linnakangas)
+ </para>
+ </listitem>
+
+ <listitem>
+<!--
+Branch: REL_13_STABLE [f17e8f33f] 2021-01-26 16:42:13 -0300
+Branch: REL_12_STABLE [fdf9d0054] 2021-01-26 16:42:13 -0300
+Branch: REL_11_STABLE [fdd405c63] 2021-01-26 16:42:13 -0300
+Branch: REL_10_STABLE [11a708f81] 2021-01-26 16:42:13 -0300
+Branch: REL9_6_STABLE [bcae842b9] 2021-01-26 16:42:13 -0300
+Branch: REL9_5_STABLE [f2dc96236] 2021-01-26 16:42:13 -0300
+-->
+ <para>
+ Report the correct database name in connection failure error
+ messages from some client programs (Álvaro Herrera)
+ </para>
+
+ <para>
+ If the database name was defaulted rather than given on the command
+ line, <application>pg_dumpall</application>,
+ <application>pgbench</application>, <application>oid2name</application>,
+ and <application>vacuumlo</application> would produce misleading
+ error messages after a connection failure.
+ </para>
+ </listitem>
+
+ <listitem>
+<!--
+Branch: master [5c0f7cc54] 2021-02-02 13:49:08 -0500
+Branch: REL_13_STABLE [586891394] 2021-02-02 13:49:08 -0500
+Branch: REL_12_STABLE [742846958] 2021-02-02 13:49:08 -0500
+Branch: REL_11_STABLE [5fc5ff61c] 2021-02-02 13:49:08 -0500
+Branch: REL_10_STABLE [2671125c7] 2021-02-02 13:49:08 -0500
+Branch: REL9_6_STABLE [608cf2bfd] 2021-02-02 13:49:08 -0500
+Branch: REL9_5_STABLE [f0f9ed68d] 2021-02-02 13:49:08 -0500
+-->
+ <para>
+ Fix memory leak in <filename>contrib/auto_explain</filename>
+ (Japin Li)
+ </para>
+
+ <para>
+ Memory consumed while producing the <literal>EXPLAIN</literal>
+ output was not freed until the end of the current transaction (for a
+ top-level statement) or the end of the surrounding statement (for a
+ nested statement). This was particularly a problem
+ with <varname>log_nested_statements</varname> enabled.
+ </para>
+ </listitem>
+
+ <listitem>
+<!--
+Branch: master [e3ebcca84] 2020-12-28 19:56:13 +0900
+Branch: REL_13_STABLE [546f14374] 2020-12-28 19:57:51 +0900
+Branch: REL_12_STABLE [e792ca4ac] 2020-12-28 19:59:00 +0900
+Branch: REL_11_STABLE [294cdd7d0] 2020-12-28 19:59:40 +0900
+Branch: REL_10_STABLE [744357d84] 2020-12-28 20:00:15 +0900
+Branch: REL9_6_STABLE [03b7a1ee7] 2020-12-28 20:00:54 +0900
+Branch: REL9_5_STABLE [b5c73eef8] 2020-12-28 20:01:31 +0900
+-->
+ <para>
+ In <filename>contrib/postgres_fdw</filename>, avoid leaking open
+ connections to remote servers when a user mapping or foreign server
+ object is dropped (Bharath Rupireddy)
+ </para>
+
+ <para>
+ Open connections that depend on a dropped user mapping or foreign
+ server can no longer be referenced, but formerly they were kept
+ around anyway for the duration of the local session.
+ </para>
+ </listitem>
+
+ <listitem>
+<!--
+Branch: master [28d1601ad] 2020-12-08 15:22:12 +0900
+Branch: REL_13_STABLE [dfd8bf2b9] 2020-12-08 15:22:38 +0900
+Branch: REL_12_STABLE [d7ecba937] 2020-12-08 15:22:43 +0900
+Branch: REL_11_STABLE [b88afd8b6] 2020-12-08 15:22:48 +0900
+Branch: REL_10_STABLE [5ba1df0f1] 2020-12-08 15:22:53 +0900
+Branch: REL9_6_STABLE [95992e5ed] 2020-12-08 15:22:59 +0900
+Branch: REL9_5_STABLE [f95d9fd81] 2020-12-08 15:23:02 +0900
+-->
+ <para>
+ In <filename>contrib/pgcrypto</filename>, check for error returns
+ from OpenSSL's EVP functions (Michael Paquier)
+ </para>
+
+ <para>
+ We do not really expect errors here, but this change silences
+ warnings from static analysis tools.
+ </para>
+ </listitem>
+
+ <listitem>
+<!--
+Branch: master [3836d4b64] 2020-11-12 14:34:37 +0000
+Branch: REL_13_STABLE [48ab1fa30] 2020-11-12 14:59:06 +0000
+Branch: REL_12_STABLE [7f69ed4ae] 2020-11-12 14:56:58 +0000
+Branch: REL_11_STABLE [7e3dc147d] 2020-11-12 14:57:04 +0000
+Branch: REL_10_STABLE [068de9dd4] 2020-11-12 14:57:08 +0000
+Branch: REL9_6_STABLE [245a35f96] 2020-11-12 14:57:13 +0000
+Branch: REL9_5_STABLE [4b212b7c8] 2020-11-12 14:55:51 +0000
+-->
+ <para>
+ In <filename>contrib/pg_trgm</filename>'s GiST index support, avoid
+ crash in the rare case that picksplit is called on exactly two index
+ items (Andrew Gierth, Alexander Korotkov)
+ </para>
+ </listitem>
+
+ <listitem>
+<!--
+Branch: master [ec29427ce] 2020-11-10 22:51:54 -0500
+Branch: REL_13_STABLE [afce7908d] 2020-11-10 22:51:55 -0500
+Branch: REL_12_STABLE [171c457cd] 2020-11-10 22:51:55 -0500
+Branch: REL_11_STABLE [3a89ea0eb] 2020-11-10 22:51:56 -0500
+Branch: REL_10_STABLE [e87139b43] 2020-11-10 22:51:57 -0500
+Branch: REL9_6_STABLE [cd39c23a2] 2020-11-10 22:51:57 -0500
+Branch: REL9_5_STABLE [210564a74] 2020-11-10 22:51:58 -0500
+-->
+ <para>
+ Fix miscalculation of timeouts
+ in <filename>contrib/pg_prewarm</filename>
+ and <filename>contrib/postgres_fdw</filename>
+ (Alexey Kondratov, Tom Lane)
+ </para>
+
+ <para>
+ The main loop in <filename>contrib/pg_prewarm</filename>'s
+ autoprewarm parent process underestimated its desired sleep time by
+ a factor of 1000, causing it to consume much more CPU than intended.
+ When waiting for a result from a remote
+ server, <filename>contrib/postgres_fdw</filename> overestimated the
+ desired timeout by a factor of 1000 (though this error had been
+ mitigated by imposing a clamp to 60 seconds).
+ </para>
+
+ <para>
+ Both of these errors stemmed from incorrectly converting
+ seconds-and-microseconds to milliseconds. Introduce a new
+ API <function>TimestampDifferenceMilliseconds()</function>
+ to make it easier to get this right in the future.
+ </para>
+ </listitem>
+
+ <listitem>
+<!--
+Branch: master [4823621db] 2021-01-15 11:28:51 -0500
+Branch: REL_13_STABLE [f44ae4db5] 2021-01-15 11:29:05 -0500
+Branch: REL_12_STABLE [f5d044eae] 2021-01-15 11:29:13 -0500
+Branch: REL_11_STABLE [046c8face] 2021-01-15 11:29:18 -0500
+Branch: REL_10_STABLE [5fa060c8f] 2021-01-15 11:29:26 -0500
+Branch: REL9_6_STABLE [fc6d08b27] 2021-01-15 11:29:34 -0500
+Branch: REL9_5_STABLE [3934543c2] 2021-01-15 11:29:43 -0500
+Branch: master [9d23c15a0] 2021-01-20 12:07:23 -0500
+Branch: REL_13_STABLE [6671e8194] 2021-01-20 12:07:31 -0500
+Branch: REL_12_STABLE [561dd8d8a] 2021-01-20 12:07:35 -0500
+Branch: REL_11_STABLE [cbcff1729] 2021-01-20 12:07:41 -0500
+Branch: REL_10_STABLE [a3345383d] 2021-01-20 12:07:46 -0500
+Branch: REL9_6_STABLE [cbcf7b130] 2021-01-20 12:07:52 -0500
+Branch: REL9_5_STABLE [175f716a8] 2021-01-20 12:07:57 -0500
+-->
+ <para>
+ Improve <application>configure</application>'s heuristics for
+ selecting <varname>PG_SYSROOT</varname> on macOS (Tom Lane)
+ </para>
+
+ <para>
+ The new method is more likely to produce desirable results when
+ Xcode is newer than the underlying operating system. Choosing
+ a sysroot that does not match the OS version may result in
+ nonfunctional executables.
+ </para>
+ </listitem>
+
+ <listitem>
+<!--
+Branch: master [49407dc32] 2020-11-20 00:07:09 -0500
+Branch: REL_13_STABLE [9e9a31bd0] 2020-11-20 00:58:26 -0500
+Branch: REL_12_STABLE [5b8360427] 2020-11-20 00:58:26 -0500
+Branch: REL_11_STABLE [d01e37845] 2020-11-20 00:58:26 -0500
+Branch: REL_10_STABLE [153bf8d20] 2020-11-20 00:58:26 -0500
+Branch: REL9_6_STABLE [e7abc1111] 2020-11-20 00:58:26 -0500
+Branch: REL9_5_STABLE [2bb8c0f1d] 2020-11-20 00:58:26 -0500
+-->
+ <para>
+ While building on macOS, specify <option>-isysroot</option> in
+ link steps as well as compile steps (James Hilliard)
+ </para>
+
+ <para>
+ This likewise improves the results when Xcode is out of sync with
+ the operating system.
+ </para>
+ </listitem>
+
+ <listitem>
+<!--
+Branch: master [c7edf4ac2] 2021-01-24 16:29:47 -0500
+Branch: REL_13_STABLE [58a545344] 2021-01-24 16:29:47 -0500
+Branch: REL_12_STABLE [5db6ba303] 2021-01-24 16:29:47 -0500
+Branch: REL_11_STABLE [c82c015b5] 2021-01-24 16:29:47 -0500
+Branch: REL_10_STABLE [728971d5f] 2021-01-24 16:29:48 -0500
+Branch: REL9_6_STABLE [7e0786751] 2021-01-24 16:29:48 -0500
+Branch: REL9_5_STABLE [c26a0865d] 2021-01-24 16:29:48 -0500
+-->
+ <para>
+ Update time zone data files to <application>tzdata</application>
+ release 2021a for DST law changes in Russia (Volgograd zone) and
+ South Sudan, plus historical corrections for Australia, Bahamas,
+ Belize, Bermuda, Ghana, Israel, Kenya, Nigeria, Palestine,
+ Seychelles, and Vanuatu.
+ </para>
+
+ <para>
+ Notably, the Australia/Currie zone has been corrected to the point
+ where it is identical to Australia/Hobart.
+ </para>
+ </listitem>
+
+ </itemizedlist>
+
+ </sect2>
+ </sect1>
+
<sect1 id="release-9-6-20">
<title>Release 9.6.20</title>
projects / postgresql.git / commitdiff