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First-draft release notes for 10.5. 

As usual, the release notes for other branches will be made by cutting
these down, but put them up for community review first.
This commit is contained in:
Tom Lane 2018-08-03 18:08:57 -04:00
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<!-- doc/src/sgml/release-10.sgml -->
<!-- See header comment in release.sgml about typical markup -->
<sect1 id="release-10-5">
<title>Release 10.5</title>
<formalpara>
<title>Release date:</title>
<para>2018-08-09</para>
</formalpara>
<para>
This release contains a variety of fixes from 10.4.
For information about new features in major release 10, see
<xref linkend="release-10"/>.
</para>
<sect2>
<title>Migration to Version 10.5</title>
<para>
A dump/restore is not required for those running 10.X.
</para>
<para>
However, if you are upgrading from a version earlier than 10.4,
see <xref linkend="release-10-4"/>.
</para>
</sect2>
<sect2>
<title>Changes</title>
<itemizedlist>
<listitem>
<!--
Author: Andres Freund <andres@anarazel.de>
Branch: master Release: REL_11_BR [a54e1f158] 2018-06-12 11:13:21 -0700
Branch: REL_10_STABLE [2ce64caaf] 2018-06-12 11:13:21 -0700
Branch: REL9_6_STABLE [6a46aba1c] 2018-06-12 11:13:21 -0700
Branch: REL9_5_STABLE [14b3ec6f3] 2018-06-12 11:13:21 -0700
Branch: REL9_4_STABLE [817f9f9a8] 2018-06-12 11:13:22 -0700
Branch: REL9_3_STABLE [9b9b622b2] 2018-06-12 11:13:22 -0700
-->
<para>
Ensure that updates to the <structfield>relfrozenxid</structfield>
and <structfield>relminmxid</structfield> values
for <quote>nailed</quote> system catalogs are processed in a timely
fashion (Andres Freund)
</para>
<para>
Overoptimistic caching rules could prevent these updates from being
seen by other sessions, leading to spurious errors and/or data
corruption. The problem was significantly worse for shared catalogs,
such as <structname>pg_authid</structname>, because the stale cache
data could persist into new sessions as well as existing ones.
</para>
</listitem>
<listitem>
<!--
Author: Michael Paquier <michael@paquier.xyz>
Branch: master [3c64dcb1e] 2018-07-05 10:46:18 +0900
Branch: REL_11_STABLE [9a1bd8271] 2018-07-05 10:46:43 +0900
Branch: REL_10_STABLE [6716f2f96] 2018-07-05 10:47:01 +0900
Branch: REL9_6_STABLE [8d68ee6f3] 2018-07-05 10:47:19 +0900
Branch: REL9_5_STABLE [23eef5cd7] 2018-07-05 10:47:32 +0900
Branch: REL9_4_STABLE [f352f43d3] 2018-07-05 10:47:50 +0900
Branch: REL9_3_STABLE [56535dcdc] 2018-07-05 10:48:03 +0900
-->
<para>
Fix case where a freshly-promoted standby crashes before having
completed its first post-recovery checkpoint (Michael Paquier, Kyotaro
Horiguchi, Pavan Deolasee, &Aacute;lvaro Herrera)
</para>
<para>
This led to a situation where the server did not think it had reached
a consistent database state during subsequent WAL replay, preventing
restart.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [0905fe891] 2018-07-09 19:26:19 -0400
Branch: REL_11_STABLE [cfcfbd39b] 2018-07-09 19:26:19 -0400
Branch: REL_10_STABLE [59b2dcbf4] 2018-07-09 19:26:19 -0400
Branch: REL9_6_STABLE [568995be6] 2018-07-09 19:26:19 -0400
Branch: REL9_5_STABLE [7ddac4e8f] 2018-07-09 19:26:19 -0400
Branch: REL9_4_STABLE [d80ec868f] 2018-07-09 19:26:19 -0400
Branch: REL9_3_STABLE [e8fe3bb23] 2018-07-09 19:26:19 -0400
-->
<para>
Avoid emitting a bogus WAL record when recycling an all-zero btree
page (Amit Kapila)
</para>
<para>
This mistake has been seen to cause assertion failures, and
potentially it could result in unnecessary query cancellations on hot
standby servers.
</para>
</listitem>
<listitem>
<!--
Author: Michael Paquier <michael@paquier.xyz>
Branch: master Release: REL_11_BR [70b4f82a4] 2018-06-18 10:43:27 +0900
Branch: REL_10_STABLE [fb28104a4] 2018-06-18 10:43:42 +0900
Branch: REL9_6_STABLE [5860b22c4] 2018-06-18 10:43:59 +0900
Branch: REL9_5_STABLE [e41c79548] 2018-06-18 10:44:10 +0900
-->
<para>
During WAL replay, guard against corrupted record lengths exceeding
1GB (Michael Paquier)
</para>
<para>
Treat such a case as corrupt data. Previously, the code would try to
allocate space and get a hard error, making recovery impossible.
</para>
</listitem>
<listitem>
<!--
Author: Michael Paquier <michael@paquier.xyz>
Branch: master [cbc55da55] 2018-07-09 10:22:34 +0900
Branch: REL_11_STABLE [5d7c9347e] 2018-07-09 10:25:40 +0900
Branch: REL_10_STABLE [c030db349] 2018-07-09 10:26:18 +0900
Branch: REL9_6_STABLE [619dea467] 2018-07-09 10:26:41 +0900
Branch: REL9_5_STABLE [62203e608] 2018-07-09 10:27:10 +0900
-->
<para>
When ending recovery, delay writing the timeline history file as long
as possible (Heikki Linnakangas)
</para>
<para>
This avoids some situations where a failure during recovery cleanup
(such as a problem with a two-phase state file) led to inconsistent
timeline state on-disk.
</para>
</listitem>
<listitem>
<!--
Author: Fujii Masao <fujii@postgresql.org>
Branch: master [b41669118] 2018-07-05 02:23:46 +0900
Branch: REL_11_STABLE [9e53171b1] 2018-07-05 02:25:45 +0900
Branch: REL_10_STABLE [8463be060] 2018-07-05 02:26:22 +0900
Branch: REL9_6_STABLE [7da22d866] 2018-07-05 02:27:05 +0900
Branch: REL9_5_STABLE [614e0729a] 2018-07-05 02:27:46 +0900
Branch: REL9_4_STABLE [62c2fe644] 2018-07-05 02:46:44 +0900
Branch: REL9_3_STABLE [7ffe0127e] 2018-07-05 02:52:28 +0900
-->
<para>
Improve performance of WAL replay for transactions that drop many
relations (Fujii Masao)
</para>
<para>
This change reduces the number of times that shared buffers are
scanned, so that it is of most benefit when that setting is large.
</para>
</listitem>
<listitem>
<!--
Author: Thomas Munro <tmunro@postgresql.org>
Branch: master Release: REL_11_BR [a40cff895] 2018-06-26 18:45:45 +1200
Branch: REL_10_STABLE [88554c091] 2018-06-26 17:17:27 +1200
Branch: REL9_6_STABLE [35750a38b] 2018-06-26 18:44:31 +1200
Branch: REL9_5_STABLE [7bcda60d4] 2018-06-26 17:56:20 +1200
Branch: REL9_4_STABLE [c4ccbcc1a] 2018-06-26 18:23:36 +1200
Branch: REL9_3_STABLE [12f7d9199] 2018-06-26 18:23:17 +1200
-->
<para>
Improve performance of lock releasing in standby server WAL replay
(Thomas Munro)
</para>
</listitem>
<listitem>
<!--
Author: Michael Paquier <michael@paquier.xyz>
Branch: master [9a7b7adc1] 2018-07-12 10:19:35 +0900
Branch: REL_11_STABLE [0414ac6a1] 2018-07-12 10:19:51 +0900
Branch: REL_10_STABLE [11abea37d] 2018-07-12 10:20:08 +0900
Branch: REL9_6_STABLE [d5eb1fe0d] 2018-07-12 10:20:14 +0900
Branch: REL9_5_STABLE [19648375c] 2018-07-12 10:20:21 +0900
Branch: REL9_4_STABLE [98e2c298c] 2018-07-12 10:20:27 +0900
-->
<para>
Make logical WAL senders report streaming state correctly (Simon
Riggs, Sawada Masahiko)
</para>
<para>
The code previously mis-detected whether or not it had caught up with
the upstream server.
</para>
</listitem>
<listitem>
<!--
Author: Alvaro Herrera <alvherre@alvh.no-ip.org>
Branch: master [4f10e7ea7] 2018-07-30 16:30:07 -0400
Branch: REL_11_STABLE [5dbd0beb8] 2018-07-30 16:30:07 -0400
Branch: REL_10_STABLE [2c4d0f32e] 2018-07-30 16:30:07 -0400
-->
<para>
Ensure that a snapshot is provided when executing data type input
functions in logical replication subscribers (Minh-Quan Tran,
&Aacute;lvaro Herrera)
</para>
<para>
This omission led to failures in some cases, such as domains with
constraints using SQL-language functions.
</para>
</listitem>
<listitem>
<!--
Author: Alvaro Herrera <alvherre@alvh.no-ip.org>
Branch: master Release: REL_11_BR [f49a80c48] 2018-06-26 16:48:10 -0400
Branch: REL_10_STABLE [b767b3f2e] 2018-06-26 16:38:34 -0400
Branch: REL9_6_STABLE [da10d6a8a] 2018-06-26 16:38:34 -0400
Branch: REL9_5_STABLE [4cb6f7837] 2018-06-26 16:38:34 -0400
Branch: REL9_4_STABLE [962313558] 2018-06-26 16:38:34 -0400
-->
<para>
Fix bugs in snapshot handling during logical decoding, allowing wrong
decoding results in rare cases (Arseny Sher, &Aacute;lvaro Herrera)
</para>
</listitem>
<listitem>
<!--
Author: Robert Haas <rhaas@postgresql.org>
Branch: master [32df1c9af] 2018-07-16 17:33:22 -0400
Branch: REL_11_STABLE [9ec9f8f68] 2018-07-16 17:33:35 -0400
Branch: REL_10_STABLE [4beb25c63] 2018-07-16 17:55:13 -0400
-->
<para>
Add subtransaction handling in logical-replication table
synchronization workers (Amit Khandekar, Robert Haas)
</para>
<para>
Previously, table synchronization could misbehave if any
subtransactions were aborted after modifying a table being
synchronized.
</para>
</listitem>
<listitem>
<!--
Author: Alexander Korotkov <akorotkov@postgresql.org>
Branch: master [309765fa1] 2018-07-19 21:04:17 +0300
Branch: REL_11_STABLE [608793266] 2018-07-19 23:26:15 +0300
Branch: REL_10_STABLE [0d26812a4] 2018-07-19 21:12:43 +0300
Branch: REL9_6_STABLE [44b550e0d] 2018-07-19 21:19:19 +0300
Branch: REL9_5_STABLE [3c09b032a] 2018-07-19 21:22:07 +0300
Branch: REL9_4_STABLE [9c6a676c4] 2018-07-19 21:24:53 +0300
-->
<para>
Fix mishandling of empty uncompressed posting list pages in GIN
indexes (Sivasubramanian Ramasubramanian, Alexander Korotkov)
</para>
<para>
This could result in an assertion failure after pg_upgrade of a
pre-9.4 GIN index (9.4 and later will not create such pages).
</para>
</listitem>
<listitem>
<!--
Author: Thomas Munro <tmunro@postgresql.org>
Branch: master [2d3067595] 2018-07-25 11:00:29 +1200
Branch: REL_11_STABLE [f2db5f3bb] 2018-07-25 11:00:42 +1200
Branch: REL_10_STABLE [46201d603] 2018-07-25 11:00:53 +1200
-->
<para>
Pad arrays of unnamed POSIX semaphores to reduce cache line sharing
(Thomas Munro)
</para>
<para>
This reduces contention on many-CPU systems, fixing a performance
regression (compared to previous releases) on Linux and FreeBSD.
</para>
</listitem>
<listitem>
<!--
Author: Amit Kapila <akapila@postgresql.org>
Branch: master [8ce29bb4f] 2018-07-27 10:53:00 +0530
Branch: REL_11_STABLE [09a5be587] 2018-07-27 10:56:07 +0530
Branch: REL_10_STABLE [ff8ce0b79] 2018-07-27 11:05:06 +0530
-->
<para>
Ensure that a process doing a parallel index scan will respond to
signals (Amit Kapila)
</para>
<para>
Previously, parallel workers could get stuck waiting for a lock on an
index page, and not notice requests to abort the query.
</para>
</listitem>
<listitem>
<!--
Author: Andres Freund <andres@anarazel.de>
Branch: master [3a01f68e3] 2018-07-04 14:58:25 -0700
Branch: REL_11_STABLE [0c69db762] 2018-07-04 15:08:32 -0700
Branch: REL_10_STABLE [009580989] 2018-07-04 14:58:39 -0700
Branch: REL9_6_STABLE [2adadf018] 2018-07-04 14:58:26 -0700
Branch: REL9_5_STABLE [f411108c9] 2018-07-04 14:58:26 -0700
Branch: REL9_4_STABLE [8c8c9f37c] 2018-07-04 14:58:26 -0700
-->
<para>
Ensure that <command>VACUUM</command> will respond to signals
within btree page deletion loops (Andres Freund)
</para>
<para>
Corrupted btree indexes could result in an infinite loop here, and
that previously wasn't interruptable without forcing a crash.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [1007b0a12] 2018-07-14 11:59:12 -0400
Branch: REL_11_STABLE [704e39319] 2018-07-14 11:59:12 -0400
Branch: REL_10_STABLE [0bb28ca36] 2018-07-14 11:59:12 -0400
-->
<para>
Fix hash-join costing mistake introduced with inner_unique
optimization (David Rowley)
</para>
<para>
This could lead to bad plan choices in situations where that
optimization was applicable.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master Release: REL_11_BR [a11b3bd37] 2018-05-16 13:46:23 -0400
Branch: REL_10_STABLE [aada0a764] 2018-05-16 13:46:09 -0400
Branch: REL9_6_STABLE [ace3c7cc0] 2018-05-16 13:46:09 -0400
Branch: REL9_5_STABLE [6d7629094] 2018-05-16 13:46:09 -0400
Branch: REL9_4_STABLE [62e0020ad] 2018-05-16 13:46:09 -0400
Branch: REL9_3_STABLE [bc711befd] 2018-05-16 13:46:09 -0400
-->
<para>
Fix misoptimization of equivalence classes involving composite-type
columns (Tom Lane)
</para>
<para>
This resulted in failure to recognize that an index on a composite
column could provide the sort order needed for a mergejoin on that
column.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master Release: REL_11_BR [07e5a2135] 2018-06-21 10:58:42 -0400
Branch: REL_10_STABLE [a4c95b0b8] 2018-06-21 10:58:42 -0400
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [57cd2b6e6] 2018-07-11 15:25:28 -0400
Branch: REL_11_STABLE [5b762d96e] 2018-07-11 15:25:28 -0400
Branch: REL_10_STABLE [c35032027] 2018-07-11 15:25:29 -0400
Branch: REL9_6_STABLE [4b8860e2d] 2018-07-11 15:25:29 -0400
-->
<para>
Fix planner to avoid <quote>ORDER/GROUP BY expression not found in
targetlist</quote> errors in some queries with set-returning functions
(Tom Lane)
</para>
</listitem>
<listitem>
<!--
Author: Alvaro Herrera <alvherre@alvh.no-ip.org>
Branch: master [b6e3a3a49] 2018-07-10 15:19:40 -0400
Branch: REL_11_STABLE [e7df94f31] 2018-07-10 15:16:27 -0400
Branch: REL_10_STABLE [7c644b7d3] 2018-07-10 15:07:28 -0400
-->
<para>
Fix handling of partition keys whose data type uses a polymorphic
btree operator class, such as arrays (Amit Langote, &Aacute;lvaro
Herrera)
</para>
</listitem>
<listitem>
<!--
Author: Andrew Gierth <rhodiumtoad@postgresql.org>
Branch: master Release: REL_11_BR [1da162e1f] 2018-05-21 17:27:08 +0100
Branch: REL_10_STABLE [cf516dc9d] 2018-05-21 17:31:01 +0100
Branch: REL9_6_STABLE [7a0aa8d12] 2018-05-21 17:32:18 +0100
Branch: REL9_5_STABLE [3b0fb2529] 2018-05-21 17:32:24 +0100
Branch: REL9_4_STABLE [769e6fcd1] 2018-05-21 17:32:29 +0100
Branch: REL9_3_STABLE [89b09db01] 2018-05-21 17:32:34 +0100
-->
<para>
Fix SQL-standard <literal>FETCH FIRST</literal> syntax to allow
parameters (<literal>$<replaceable>n</replaceable></literal>), as the
standard expects (Andrew Gierth)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [240971675] 2018-07-19 15:41:46 -0400
Branch: REL_11_STABLE [b1af4bcc4] 2018-07-19 15:41:46 -0400
Branch: REL_10_STABLE [2131d4501] 2018-07-19 15:41:46 -0400
-->
<para>
Remove undocumented restriction against duplicate partition key
columns (Yugo Nagata)
</para>
</listitem>
<listitem>
<!--
Author: Michael Paquier <michael@paquier.xyz>
Branch: master Release: REL_11_BR [1c7c317cd] 2018-06-20 10:42:25 +0900
Branch: REL_10_STABLE [5862174ec] 2018-06-20 10:48:28 +0900
-->
<para>
Disallow temporary tables from being partitions of non-temporary
tables (Amit Langote, Michael Paquier)
</para>
<para>
While previously allowed, this case didn't work reliably.
</para>
</listitem>
<listitem>
<!--
Author: Amit Kapila <akapila@postgresql.org>
Branch: master [85c9d3475] 2018-08-03 11:02:02 +0530
Branch: REL_11_STABLE [dac7fe13b] 2018-08-03 11:16:25 +0530
Branch: REL_10_STABLE [b805b63ac] 2018-08-03 11:27:11 +0530
Branch: REL9_6_STABLE [19df1702f] 2018-08-03 11:43:01 +0530
Author: Amit Kapila <akapila@postgresql.org>
Branch: master [ccc84a956] 2018-08-03 09:11:37 +0530
Branch: REL_11_STABLE [ef305bd59] 2018-08-03 09:29:45 +0530
Branch: REL_10_STABLE [3f02b5150] 2018-08-03 09:50:24 +0530
Branch: REL9_6_STABLE [7124c93fb] 2018-08-03 10:07:56 +0530
-->
<para>
Fix <command>EXPLAIN</command>'s accounting for resource usage,
particularly buffer accesses, in parallel workers
(Amit Kapila, Robert Haas)
</para>
</listitem>
<listitem>
<!--
Author: Alvaro Herrera <alvherre@alvh.no-ip.org>
Branch: master Release: REL_11_BR [0c8910a0c] 2018-06-08 16:19:05 -0400
Branch: REL_10_STABLE [a25c207b2] 2018-06-08 16:27:56 -0400
-->
<para>
Fix <command>SHOW ALL</command> to show all settings to roles that are
members of <literal>pg_read_all_settings</literal>, and also allow
such roles to see source filename and line number in
the <structname>pg_settings</structname> view (Laurenz Albe,
&Aacute;lvaro Herrera)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master Release: REL_11_BR [1a31baf61] 2018-05-24 12:38:55 -0400
Branch: REL_10_STABLE [e8cb8fdfd] 2018-05-24 12:38:55 -0400
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master Release: REL_11_BR [056f52d9c] 2018-05-24 12:07:41 -0400
Branch: REL_10_STABLE [eb1aa1b46] 2018-05-24 12:07:41 -0400
Branch: REL9_6_STABLE [3d3165210] 2018-05-24 12:07:41 -0400
Branch: REL9_5_STABLE [ad73c07b4] 2018-05-24 12:07:41 -0400
Branch: REL9_4_STABLE [8f2143bc8] 2018-05-24 12:07:41 -0400
Branch: REL9_3_STABLE [cbb37b2e1] 2018-05-24 12:07:42 -0400
-->
<para>
Fix failure to schema-qualify some object names
in <function>getObjectDescription</function>
and <function>getObjectIdentity</function> output
(Kyotaro Horiguchi, Tom Lane)
</para>
<para>
Names of collations, conversions, text search objects, publication
relations, and extended statistics objects were not schema-qualified
when they should be.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master Release: REL_11_BR [05ca21b87] 2018-05-15 15:06:53 -0400
Branch: REL_10_STABLE [17083ab7e] 2018-05-15 15:06:53 -0400
Branch: REL9_6_STABLE [f92491186] 2018-05-15 15:06:53 -0400
-->
<para>
Fix <command>CREATE AGGREGATE</command> type checking so that
parallelism support functions can be attached to variadic aggregates
(Alexey Bashtanov)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master Release: REL_11_BR [ecac23511] 2018-05-22 13:32:52 -0400
Branch: REL_10_STABLE [c92d1461e] 2018-05-22 13:32:52 -0400
Branch: REL9_6_STABLE [588edd83e] 2018-05-22 13:32:52 -0400
Branch: REL9_5_STABLE [7df277827] 2018-05-22 13:32:52 -0400
Branch: REL9_4_STABLE [d25714d0a] 2018-05-22 13:32:52 -0400
Branch: REL9_3_STABLE [d78028350] 2018-05-22 13:32:52 -0400
-->
<para>
Widen <command>COPY FROM</command>'s current-line-number counter
from 32 to 64 bits (David Rowley)
</para>
<para>
This avoids two problems with input exceeding 4G lines: <literal>COPY
FROM WITH HEADER</literal> would drop a line every 4G lines, not only
the first line, and error reports could show a wrong line number.
</para>
</listitem>
<listitem>
<!--
Author: Alvaro Herrera <alvherre@alvh.no-ip.org>
Branch: master [0ce5cf2ef] 2018-07-06 16:38:30 -0400
Branch: REL_11_STABLE [ef6464595] 2018-07-06 16:38:29 -0400
Branch: REL_10_STABLE [a1f680d96] 2018-07-06 16:38:29 -0400
-->
<para>
Allow replication slots to be dropped in single-user mode
(&Aacute;lvaro Herrera)
</para>
<para>
This use-case was accidentally broken in release 10.0.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master Release: REL_11_BR [ec4719cd1] 2018-06-21 16:18:39 -0400
Branch: REL_10_STABLE [b8a1d0302] 2018-06-21 16:18:34 -0400
-->
<para>
Fix incorrect results from <function>variance(int4)</function> and
related aggregates when run in parallel aggregation mode
(David Rowley)
</para>
</listitem>
<listitem>
<!--
Author: Alvaro Herrera <alvherre@alvh.no-ip.org>
Branch: master Release: REL_11_BR [b7f0be9a7] 2018-06-20 12:58:12 -0400
Branch: REL_10_STABLE [e10bc161f] 2018-06-20 12:58:12 -0400
Branch: REL_10_STABLE [04ab840b8] 2018-06-20 13:02:46 -0400
-->
<para>
Process <literal>TEXT</literal> and <literal>CDATA</literal> nodes
correctly in <function>xmltable()</function> column expressions
(Markus Winand)
</para>
</listitem>
<listitem>
<!--
Author: Dean Rasheed <dean.a.rasheed@gmail.com>
Branch: master [8f6ce7fb0] 2018-07-20 08:55:44 +0100
Branch: REL_11_STABLE [1f919e663] 2018-07-20 08:57:08 +0100
Branch: REL_10_STABLE [821200405] 2018-07-20 08:58:37 +0100
-->
<para>
Cope with possible failure of <application>OpenSSL</application>'s
<function>RAND_bytes()</function> function
(Dean Rasheed, Michael Paquier)
</para>
<para>
Under rare circumstances, this oversight could result in <quote>could
not generate random cancel key</quote> failures that could only be
resolved by restarting the postmaster.
</para>
</listitem>
<listitem>
<!--
Author: Peter Eisentraut <peter_e@gmx.net>
Branch: master Release: REL_11_BR [1944cdc98] 2018-03-27 12:32:18 -0400
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: REL_10_STABLE [62038810b] 2018-08-03 11:30:34 -0400
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [24986c955] 2018-08-03 12:12:10 -0400
Branch: REL_11_STABLE [6efc30167] 2018-08-03 12:12:10 -0400
Branch: REL_10_STABLE [8d00858ba] 2018-08-03 12:12:10 -0400
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [c7a8f7867] 2018-08-03 12:20:47 -0400
Branch: REL_11_STABLE [d8b2beb26] 2018-08-03 12:20:47 -0400
Branch: REL_10_STABLE [ed5d8196c] 2018-08-03 12:20:47 -0400
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [e3f99e03e] 2018-08-01 12:30:36 -0400
Branch: REL_11_STABLE [e9bbfe608] 2018-08-01 12:30:36 -0400
Branch: REL_10_STABLE [71e3b2890] 2018-08-01 12:30:36 -0400
Author: Heikki Linnakangas <heikki.linnakangas@iki.fi>
Branch: master [b90d97e08] 2018-07-19 20:24:29 +0300
Branch: REL_11_STABLE [dc961e582] 2018-07-19 20:24:59 +0300
Branch: REL_10_STABLE [ff4fb4cc1] 2018-07-19 20:25:05 +0300
-->
<para>
Fix <application>libpq</application>'s handling of some cases
where <literal>hostaddr</literal> is specified
(Hari Babu, Tom Lane, Robert Haas)
</para>
<para>
<function>PQhost()</function> gave misleading or incorrect results
in some cases. Now, it uniformly returns the host name if specified,
or the host address if only that is specified, or the default host
name (typically <literal>/tmp</literal>
or <literal>localhost</literal>) if both parameters are omitted.
</para>
<para>
Also, the wrong value might be compared to the server name when
verifying an SSL certificate.
</para>
<para>
Also, the wrong value might be compared to the host name field in
<filename>~/.pgpass</filename>. Now, that field is compared to the
host name if specified, or the host address if only that is specified,
or <literal>localhost</literal> if both parameters are omitted.
</para>
<para>
Also, an incorrect error message was reported for an unparseable
<literal>hostaddr</literal> value.
</para>
<para>
Also, when the <literal>host</literal>, <literal>hostaddr</literal>,
or <literal>port</literal> parameters contain comma-separated
lists, <application>libpq</application> is now more careful to treat
empty elements of a list as selecting the default behavior.
</para>
</listitem>
<listitem>
<!--
Author: Thomas Munro <tmunro@postgresql.org>
Branch: master Release: REL_11_BR [4c8156d87] 2018-06-18 18:33:53 +1200
Branch: REL_10_STABLE [3566873f2] 2018-06-26 19:49:52 +1200
Branch: REL9_6_STABLE [b5b973ef0] 2018-06-26 20:54:09 +1200
Branch: REL9_5_STABLE [3bc19d0d2] 2018-06-26 20:54:40 +1200
Branch: REL9_4_STABLE [db05d0b90] 2018-06-26 23:21:39 +1200
Branch: REL9_3_STABLE [edabd8f5a] 2018-06-26 23:37:49 +1200
-->
<para>
Add a string freeing function
to <application>ecpg</application>'s <filename>pgtypes</filename>
library, so that cross-module memory management problems can be
avoided on Windows (Takayuki Tsunakawa)
</para>
<para>
On Windows, crashes can ensue if the <function>free</function> call
for a given chunk of memory is not made from the same DLL
that <function>malloc</function>'ed the memory.
The <filename>pgtypes</filename> library sometimes returns strings
that it expects the caller to free, making it impossible to follow
this rule. Add a <function>PGTYPESchar_free()</function> function
that just wraps <function>free</function>, allowing applications
to follow this rule.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master Release: REL_11_BR [f586f8638] 2018-05-18 12:52:28 -0400
Branch: REL_10_STABLE [cf39aebf1] 2018-05-18 12:52:28 -0400
Branch: REL9_6_STABLE [25caeae8d] 2018-05-18 12:52:28 -0400
Branch: REL9_5_STABLE [11a110595] 2018-05-18 12:52:28 -0400
Branch: REL9_4_STABLE [385f4acbf] 2018-05-18 12:52:28 -0400
Branch: REL9_3_STABLE [63d3e787f] 2018-05-18 12:52:28 -0400
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master Release: REL_11_BR [a6228128f] 2018-05-18 22:42:10 -0400
Branch: REL_10_STABLE [c964c2147] 2018-05-18 22:42:10 -0400
Branch: REL9_6_STABLE [4ffd7909c] 2018-05-18 22:42:10 -0400
Branch: REL9_5_STABLE [95fef6e82] 2018-05-18 22:42:10 -0400
Branch: REL9_4_STABLE [023aa76e1] 2018-05-18 22:42:10 -0400
Branch: REL9_3_STABLE [e9f475f99] 2018-05-18 22:42:10 -0400
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master Release: REL_11_BR [06f66cff9] 2018-05-19 14:22:18 -0400
Branch: REL_10_STABLE [a5be529aa] 2018-05-19 14:22:18 -0400
Branch: REL9_6_STABLE [22d22e4bd] 2018-05-19 14:22:18 -0400
Branch: REL9_5_STABLE [7329af6b9] 2018-05-19 14:22:18 -0400
Branch: REL9_4_STABLE [8109f201d] 2018-05-19 14:22:19 -0400
Branch: REL9_3_STABLE [91f3bcc9e] 2018-05-19 14:22:19 -0400
-->
<para>
Fix <application>ecpg</application>'s support for <type>long
long</type> variables on Windows, as well as other platforms that
declare <function>strtoll</function>/<function>strtoull</function>
nonstandardly or not at all (Dang Minh Huong, Tom Lane)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master Release: REL_11_BR [9a8aa25cc] 2018-05-25 14:31:06 -0400
Branch: REL_10_STABLE [5a225b0d6] 2018-05-25 14:31:06 -0400
Branch: REL9_6_STABLE [f9ecb6cab] 2018-05-25 14:31:07 -0400
Branch: REL9_5_STABLE [004293c66] 2018-05-25 14:31:07 -0400
Branch: REL9_4_STABLE [98d522a1d] 2018-05-25 14:31:07 -0400
Branch: REL9_3_STABLE [da757bf0f] 2018-05-25 14:31:07 -0400
-->
<para>
Fix misidentification of SQL statement type in PL/pgSQL, when a rule
change causes a change in the semantics of a statement intra-session
(Tom Lane)
</para>
<para>
This error led to assertion failures, or in rare cases, failure to
enforce the <literal>INTO STRICT</literal> option as expected.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master Release: REL_11_BR [50485b3e2] 2018-05-23 19:04:34 -0400
Branch: REL_10_STABLE [bed74e9d4] 2018-05-23 19:04:34 -0400
Branch: REL9_6_STABLE [bbaf75ee0] 2018-05-23 19:04:34 -0400
Branch: REL9_5_STABLE [085791b8a] 2018-05-23 19:04:34 -0400
Branch: REL9_4_STABLE [09fb2d5d3] 2018-05-23 19:04:34 -0400
Branch: REL9_3_STABLE [3466b0202] 2018-05-23 19:04:34 -0400
-->
<para>
Fix password prompting in client programs so that echo is properly
disabled on Windows when <literal>stdin</literal> is not the
terminal (Matthew Stickney)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [f3eb76b39] 2018-07-31 13:00:14 -0400
Branch: REL_11_STABLE [a56c11d44] 2018-07-31 13:00:08 -0400
Branch: REL_10_STABLE [31b29b1b3] 2018-07-31 13:00:08 -0400
Branch: REL9_6_STABLE [6680d19a8] 2018-07-31 13:00:08 -0400
Branch: REL9_5_STABLE [12f2d814a] 2018-07-31 13:00:08 -0400
Branch: REL9_4_STABLE [88adf1add] 2018-07-31 13:00:08 -0400
Branch: REL9_3_STABLE [461e2e433] 2018-07-31 13:00:08 -0400
-->
<para>
Further fix mis-quoting of values for list-valued GUC variables in
dumps (Tom Lane)
</para>
<para>
The previous fix for quoting of <varname>search_path</varname> and
other list-valued variables in <application>pg_dump</application>
output turned out to misbehave for empty-string list elements, and it
risked truncation of long file paths.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [c0a552921] 2018-07-30 12:35:49 -0400
Branch: REL_11_STABLE [f6ef3ed43] 2018-07-30 12:35:49 -0400
Branch: REL_10_STABLE [96b1d984f] 2018-07-30 12:35:49 -0400
Branch: REL9_6_STABLE [8c7f64b0e] 2018-07-30 12:35:49 -0400
Branch: REL9_5_STABLE [b868c08eb] 2018-07-30 12:35:49 -0400
Branch: REL9_4_STABLE [addf9e1bd] 2018-07-30 12:35:49 -0400
-->
<para>
Fix <application>pg_dump</application>'s failure to
dump <literal>REPLICA IDENTITY</literal> properties for constraint
indexes (Tom Lane)
</para>
<para>
Manually-created unique indexes were properly marked, but not those
created by declaring <literal>UNIQUE</literal> or <literal>PRIMARY
KEY</literal> constraints.
</para>
</listitem>
<listitem>
<!--
Author: Bruce Momjian <bruce@momjian.us>
Branch: master [244142d32] 2018-07-28 15:01:55 -0400
Branch: REL_11_STABLE [113224848] 2018-07-28 15:01:55 -0400
Branch: REL_10_STABLE [9a13e7f0f] 2018-07-28 15:01:55 -0400
Branch: REL9_6_STABLE [a326ca75b] 2018-07-28 15:01:55 -0400
Branch: REL9_5_STABLE [260fe9f2b] 2018-07-28 15:01:55 -0400
Branch: REL9_4_STABLE [f87878106] 2018-07-28 15:01:55 -0400
Branch: REL9_3_STABLE [a5c84e0b7] 2018-07-28 15:01:55 -0400
Branch: master [b6d6488a3] 2018-07-31 18:10:06 -0400
Branch: REL_11_STABLE [920001633] 2018-07-31 18:10:06 -0400
Branch: REL_10_STABLE [d8dd8d221] 2018-07-31 18:10:06 -0400
Branch: REL9_6_STABLE [764e21db0] 2018-07-31 18:10:06 -0400
Branch: REL9_5_STABLE [92a11a0d8] 2018-07-31 18:10:06 -0400
Branch: REL9_4_STABLE [12dd07008] 2018-07-31 18:10:06 -0400
Branch: REL9_3_STABLE [a1d383ab5] 2018-07-31 18:10:06 -0400
Branch: REL9_3_STABLE [dfc71a1b2] 2018-07-31 19:06:32 -0400
-->
<para>
Make <application>pg_upgrade</application> check that the old server
was shut down cleanly (Bruce Momjian)
</para>
<para>
The previous check could be fooled by an immediate-mode shutdown.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master Release: REL_11_BR [e3b7f7cc5] 2018-06-18 15:55:06 -0400
Branch: REL_10_STABLE [7594b7a53] 2018-06-18 15:55:06 -0400
Branch: REL9_6_STABLE [1bebfb9b6] 2018-06-18 15:55:06 -0400
Branch: REL9_5_STABLE [645929c54] 2018-06-18 15:55:06 -0400
-->
<para>
Fix <filename>contrib/hstore_plperl</filename> to look through Perl
scalar references, and to not crash if it doesn't find a hash
reference where it expects one (Tom Lane)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [28a1ae534] 2018-07-13 18:45:30 -0400
Branch: REL_11_STABLE [dbd7f4e7c] 2018-07-13 18:45:30 -0400
Branch: REL_10_STABLE [1f47eb08c] 2018-07-13 18:45:30 -0400
Branch: REL9_6_STABLE [330cad2c4] 2018-07-13 18:45:30 -0400
Branch: REL9_5_STABLE [ac6b69c19] 2018-07-13 18:45:30 -0400
Branch: REL9_4_STABLE [f8e8be7f2] 2018-07-13 18:45:30 -0400
Branch: REL9_3_STABLE [cbbe75fe6] 2018-07-13 18:45:30 -0400
-->
<para>
Fix crash in <filename>contrib/ltree</filename>'s
<function>lca()</function> function when the input array is empty
(Pierre Ducroquet)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master Release: REL_11_BR [81256cd05] 2018-05-21 00:32:28 -0400
Branch: REL_10_STABLE [28782d7e3] 2018-05-21 00:32:39 -0400
Branch: REL9_6_STABLE [1545ca9a7] 2018-05-21 00:32:44 -0400
Branch: REL9_5_STABLE [ced0cdc76] 2018-05-21 00:32:48 -0400
Branch: REL9_4_STABLE [5517367e9] 2018-05-21 00:32:52 -0400
Author: Michael Paquier <michael@paquier.xyz>
Branch: master Release: REL_11_BR [6cb337241] 2018-06-25 11:19:05 +0900
Branch: REL_10_STABLE [6eec6724f] 2018-06-25 11:20:19 +0900
Branch: REL9_6_STABLE [7fdf56b0a] 2018-06-25 11:20:50 +0900
Branch: REL9_5_STABLE [910e2aca1] 2018-06-25 11:21:49 +0900
Branch: REL9_4_STABLE [79b5b101f] 2018-06-25 11:22:02 +0900
Branch: REL9_3_STABLE [f53ed82b7] 2018-06-25 11:22:24 +0900
Author: Magnus Hagander <magnus@hagander.net>
Branch: master Release: REL_11_BR [cfb758b6d] 2018-05-18 17:54:18 +0200
Branch: REL_10_STABLE [29ce50091] 2018-05-18 17:53:12 +0200
Branch: REL9_6_STABLE [830e8e360] 2018-05-18 17:53:15 +0200
Branch: REL9_5_STABLE [714d8e5fa] 2018-05-18 17:53:17 +0200
Branch: REL9_4_STABLE [b5f096d50] 2018-05-18 17:53:19 +0200
Branch: REL9_3_STABLE [048caa556] 2018-05-18 17:53:20 +0200
-->
<para>
Fix various error-handling code paths in which an incorrect error code
might be reported (Michael Paquier, Tom Lane, Magnus Hagander)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master Release: REL_11_BR [dddfc4cb2] 2018-04-03 16:26:05 -0400
Branch: REL_10_STABLE [c74f48a4e] 2018-07-09 17:23:31 -0400
Branch: REL9_6_STABLE [ccc286da1] 2018-07-09 17:23:31 -0400
Branch: REL9_5_STABLE [6532ca57a] 2018-07-09 17:23:31 -0400
Branch: REL9_4_STABLE [dd4e83674] 2018-07-09 17:23:32 -0400
Branch: REL9_3_STABLE [f6f75539d] 2018-07-09 17:23:32 -0400
-->
<para>
Rearrange makefiles to ensure that programs link to freshly-built
libraries (such as <filename>libpq.so</filename>) rather than ones
that might exist in the system library directories (Tom Lane)
</para>
<para>
This avoids problems when building on platforms that supply old copies
of <productname>PostgreSQL</productname> libraries.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master Release: REL_11_BR [234bb985c] 2018-05-09 13:56:22 -0400
Branch: REL_10_STABLE [aba2f5522] 2018-05-09 13:55:42 -0400
Branch: REL9_6_STABLE [22e524d97] 2018-05-09 13:55:48 -0400
Branch: REL9_5_STABLE [777918e34] 2018-05-09 13:55:54 -0400
Branch: REL9_4_STABLE [32453bc5a] 2018-05-09 13:56:00 -0400
Branch: REL9_3_STABLE [3f36e4fc5] 2018-05-09 13:56:06 -0400
-->
<para>
Update time zone data files to <application>tzdata</application>
release 2018e for DST law changes in North Korea, plus historical
corrections for Czechoslovakia.
</para>
<para>
This update includes a redefinition of <quote>daylight savings</quote>
in Ireland, as well as for some past years in Namibia and
Czechoslovakia. In those jurisdictions, legally standard time is
observed in summer, and daylight savings time in winter, so that the
daylight savings offset is one hour behind standard time not one hour
ahead. This does not affect either the actual UTC offset or the
timezone abbreviations in use; the only known effect is that
the <structfield>is_dst</structfield> column in
the <structname>pg_timezone_names</structname> view will now be true
in winter and false in summer in these cases.
</para>
</listitem>
</itemizedlist>
</sect2>
</sect1>
<sect1 id="release-10-4">
<title>Release 10.4</title>