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Release notes for 11.5, 10.10, 9.6.15, 9.5.19, 9.4.24.

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<!-- doc/src/sgml/release-10.sgml -->
<!-- See header comment in release.sgml about typical markup -->
<sect1 id="release-10-10">
<title>Release 10.10</title>
<formalpara>
<title>Release date:</title>
<para>2019-08-08</para>
</formalpara>
<para>
This release contains a variety of fixes from 10.9.
For information about new features in major release 10, see
<xref linkend="release-10">.
</para>
<sect2>
<title>Migration to Version 10.10</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 10.6,
see <xref linkend="release-10-6">.
</para>
</sect2>
<sect2>
<title>Changes</title>
<itemizedlist>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master Release: REL_12_BR [f946a4091] 2019-06-24 16:43:21 -0400
Branch: REL_11_STABLE [afaf48afb] 2019-06-24 16:43:05 -0400
Branch: REL_10_STABLE [cb8962ce8] 2019-06-24 16:43:05 -0400
Branch: REL9_6_STABLE [da1041fc3] 2019-06-24 16:43:05 -0400
Branch: REL9_5_STABLE [316f68932] 2019-06-24 16:43:05 -0400
Branch: REL9_4_STABLE [ddfb1b2ee] 2019-06-24 16:43:05 -0400
-->
<para>
Fix failure of <command>ALTER TABLE ... ALTER COLUMN TYPE</command>
when altering multiple columns' types in one command (Tom Lane)
</para>
<para>
This fixes a regression introduced in the most recent minor releases:
indexes using the altered columns were not processed correctly,
leading to strange failures during <command>ALTER TABLE</command>.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [a0555ddab] 2019-07-22 14:55:40 -0400
Branch: REL_12_STABLE [79e573fa4] 2019-07-22 14:55:23 -0400
Branch: REL_11_STABLE [6cdefc82b] 2019-07-22 14:55:23 -0400
Branch: REL_10_STABLE [0e1deaa4c] 2019-07-22 14:55:23 -0400
-->
<para>
Install dependencies to prevent dropping partition key columns
(Tom Lane)
</para>
<para>
<command>ALTER TABLE ... DROP COLUMN</command> will refuse to drop
a column that is a partition key column. However, indirect drops
(such as a cascade from dropping a key column's data type) had no
such check, allowing the deletion of a key column. This resulted in
a badly broken partitioned table that could neither be accessed nor
dropped.
</para>
<para>
This fix adds <structname>pg_depend</structname> entries that
enforce that the whole partitioned table, not just the key column,
will be dropped if a cascaded drop forces removal of the key column.
However, such entries will only be created when a partitioned table
is created; so this fix does not remove the risk for pre-existing
partitioned tables. The issue can only arise for partition key
columns of non-built-in data types, so it seems not to be a hazard
for most users.
</para>
</listitem>
<listitem>
<!--
Author: David Rowley <drowley@postgresql.org>
Branch: master [a5be4062f] 2019-07-03 23:44:54 +1200
Branch: REL_12_STABLE [0cce43a71] 2019-07-03 23:45:25 +1200
Branch: REL_11_STABLE [133f5ae21] 2019-07-03 23:45:42 +1200
Branch: REL_10_STABLE [232019b79] 2019-07-03 23:46:06 +1200
Branch: REL9_6_STABLE [388d05a5e] 2019-07-03 23:46:26 +1200
-->
<para>
Don't optimize away <literal>GROUP BY</literal> columns when the
table involved is an inheritance parent (David Rowley)
</para>
<para>
Normally, if a table's primary key column(s) are included
in <literal>GROUP BY</literal>, it's safe to drop any other grouping
columns, since the primary key columns are enough to make the groups
unique. This rule does not work if the query is also reading
inheritance child tables, though; the parent's uniqueness does not
extend to the children.
</para>
</listitem>
<listitem>
<!--
Author: Andrew Gierth <rhodiumtoad@postgresql.org>
Branch: master Release: REL_12_BR [da53be23d] 2019-06-30 23:49:13 +0100
Branch: REL_11_STABLE [05dc5f476] 2019-06-30 23:49:23 +0100
Branch: REL_10_STABLE [a1637caee] 2019-06-30 23:49:25 +0100
Branch: REL9_6_STABLE [793eb94e3] 2019-06-30 23:49:29 +0100
Branch: REL9_5_STABLE [4a36c7715] 2019-06-30 23:49:31 +0100
-->
<para>
Avoid using unnecessary sort steps for some queries
with <literal>GROUPING SETS</literal> (Andrew Gierth, Richard Guo)
</para>
</listitem>
<listitem>
<!--
Author: Thomas Munro <tmunro@postgresql.org>
Branch: master [f5825853e] 2019-07-10 10:15:32 +1200
Branch: REL_12_STABLE [abbb2e143] 2019-07-10 10:15:43 +1200
Branch: REL_11_STABLE [9509173d2] 2019-07-10 10:15:54 +1200
Branch: REL_10_STABLE [72b526779] 2019-07-10 10:16:02 +1200
-->
<para>
Fix failure to access trigger transition tables
during <literal>EvalPlanQual</literal> rechecks (Alex Aktsipetrov)
</para>
<para>
Triggers that rely on transition tables sometimes failed in the
presence of concurrent updates.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [3093eb2b8] 2019-07-16 18:17:47 -0400
Branch: REL_12_STABLE [e0d13dc6f] 2019-07-16 18:17:47 -0400
Branch: REL_11_STABLE [46e2a18d0] 2019-07-16 18:17:47 -0400
Branch: REL_10_STABLE [583025c3c] 2019-07-16 18:17:47 -0400
Branch: REL9_6_STABLE [a6e7eb42d] 2019-07-16 18:17:47 -0400
Branch: REL9_5_STABLE [f9208f246] 2019-07-16 18:17:47 -0400
Branch: REL9_4_STABLE [67bd6adcb] 2019-07-16 18:17:47 -0400
-->
<para>
Fix mishandling of multi-column foreign keys when rebuilding a
foreign key constraint (Tom Lane)
</para>
<para>
<command>ALTER TABLE</command> could make an incorrect decision about
whether revalidation of a foreign key is necessary, if not all
columns of the key are of the same type. It seems likely that the
error would always have been in the conservative direction, that is
revalidating unnecessarily.
</para>
</listitem>
<listitem>
<!--
Author: Tomas Vondra <tomas.vondra@postgresql.org>
Branch: master [14ef15a22] 2019-07-30 19:47:33 +0200
Branch: REL_12_STABLE [e1947f6c3] 2019-07-30 19:48:13 +0200
Branch: REL_11_STABLE [4dbf70b2f] 2019-07-30 19:48:26 +0200
Branch: REL_10_STABLE [859b3003d] 2019-07-30 19:48:39 +0200
-->
<para>
Don't build extended statistics for inheritance trees (Tomas Vondra)
</para>
<para>
This avoids a <quote>tuple already updated by self</quote> error
during <command>ANALYZE</command>.
</para>
</listitem>
<listitem>
<!--
Author: Alvaro Herrera <alvherre@alvh.no-ip.org>
Branch: master Release: REL_12_BR [8b21b416e] 2019-06-18 18:23:16 -0400
Branch: REL_11_STABLE [5246d3e79] 2019-06-18 18:23:16 -0400
Branch: REL_10_STABLE [0772d8a00] 2019-06-18 18:23:16 -0400
Branch: REL9_6_STABLE [0ba35c7c9] 2019-06-18 18:23:16 -0400
-->
<para>
Avoid spurious deadlock errors when upgrading a tuple lock
(Oleksii Kliukin)
</para>
<para>
When two or more transactions are waiting for a transaction T1 to
release a tuple-level lock, and T1 upgrades its lock to a higher
level, a spurious deadlock among the waiting transactions could be
reported when T1 finishes.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [3420851a2] 2019-07-29 18:49:04 -0400
Branch: REL_12_STABLE [d933816c0] 2019-07-29 18:49:04 -0400
Branch: REL_11_STABLE [0dcb1c6c4] 2019-07-29 18:49:04 -0400
Branch: REL_10_STABLE [af41ab50f] 2019-07-29 18:49:04 -0400
Branch: REL9_6_STABLE [c3b613e1b] 2019-07-29 18:49:04 -0400
-->
<para>
Fix failure to resolve deadlocks involving multiple parallel worker
processes (Rui Hai Jiang)
</para>
<para>
It is not clear whether this bug is reachable with non-artificial
queries, but if it did happen, the queries involved in an
otherwise-resolvable deadlock would block until canceled.
</para>
</listitem>
<listitem>
<!--
Author: Jeff Davis <jdavis@postgresql.org>
Branch: master [e6feef571] 2019-07-18 13:41:10 -0700
Branch: REL_12_STABLE [613eabcd5] 2019-07-18 17:26:47 -0700
Branch: REL_11_STABLE [f5f20deda] 2019-07-18 14:01:17 -0700
Branch: REL_10_STABLE [955089d4d] 2019-07-18 16:49:10 -0700
Branch: REL9_6_STABLE [56afeb765] 2019-07-18 16:53:17 -0700
Branch: REL9_5_STABLE [8af1fccba] 2019-07-18 16:55:59 -0700
Branch: REL9_4_STABLE [2be355498] 2019-07-18 17:01:44 -0700
Branch: master [b538c90b1] 2019-07-18 17:04:50 -0700
Branch: REL_12_STABLE [5245552dd] 2019-07-18 17:26:56 -0700
Branch: REL_11_STABLE [477ebfc96] 2019-07-18 16:45:03 -0700
Branch: REL_10_STABLE [b0a7e0f07] 2019-07-18 16:49:25 -0700
Branch: REL9_6_STABLE [390bf90f7] 2019-07-18 16:53:25 -0700
Branch: REL9_5_STABLE [f1c72294b] 2019-07-18 16:56:18 -0700
Branch: REL9_4_STABLE [812623b69] 2019-07-18 17:01:58 -0700
-->
<para>
Prevent incorrect canonicalization of date ranges
with <literal>infinity</literal> endpoints (Laurenz Albe)
</para>
<para>
It's incorrect to try to convert an open range to a closed one or
vice versa by incrementing or decrementing the endpoint value, if
the endpoint is infinite; so leave the range alone in such cases.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [b9d2c5c7a] 2019-07-26 11:59:00 -0400
Branch: REL_12_STABLE [01e0538e8] 2019-07-26 11:59:00 -0400
Branch: REL_11_STABLE [ca918f99a] 2019-07-26 11:59:00 -0400
Branch: REL_10_STABLE [fa854112f] 2019-07-26 11:59:00 -0400
Branch: REL9_6_STABLE [30bed9f63] 2019-07-26 11:59:00 -0400
Branch: REL9_5_STABLE [13e493cf6] 2019-07-26 11:59:00 -0400
Branch: REL9_4_STABLE [81b29c871] 2019-07-26 11:59:00 -0400
-->
<para>
Fix loss of fractional digits when converting very
large <type>money</type> values to <type>numeric</type> (Tom Lane)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master Release: REL_12_BR [1323bfce5] 2019-06-22 20:31:50 -0400
Branch: REL_11_STABLE [40dde8290] 2019-06-22 20:31:50 -0400
Branch: REL_10_STABLE [05399b148] 2019-06-22 20:31:50 -0400
Branch: REL9_6_STABLE [9895e3a36] 2019-06-22 20:31:50 -0400
Branch: REL9_5_STABLE [36d2c3ad3] 2019-06-22 20:31:50 -0400
Branch: REL9_4_STABLE [2854e2ab6] 2019-06-22 20:31:50 -0400
-->
<para>
Fix spinlock assembly code for MIPS CPUs so that it works on
MIPS r6 (YunQiang Su)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [b654714f9] 2019-07-25 12:11:17 -0400
Branch: REL_12_STABLE [c58cf97f2] 2019-07-25 12:11:18 -0400
Branch: REL_11_STABLE [11a0a4db3] 2019-07-25 12:11:19 -0400
Branch: REL_10_STABLE [cb65b454f] 2019-07-25 12:11:21 -0400
Branch: REL9_6_STABLE [ba27151d1] 2019-07-25 12:11:22 -0400
Branch: REL9_5_STABLE [6266654db] 2019-07-25 12:11:23 -0400
Branch: REL9_4_STABLE [8c52b77dd] 2019-07-25 12:11:24 -0400
-->
<para>
Make <application>libpq</application> ignore carriage return
(<literal>\r</literal>) in connection service files
(Tom Lane, Michael Paquier)
</para>
<para>
In some corner cases, service files containing Windows-style
newlines could be mis-parsed, resulting in connection failures.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [0ec3e13c6] 2019-07-02 13:35:14 -0400
Branch: REL_12_STABLE [4f3648de2] 2019-07-02 13:35:14 -0400
Branch: REL_11_STABLE [074add6ed] 2019-07-02 13:35:14 -0400
Branch: REL_10_STABLE [90434e6f2] 2019-07-02 13:35:14 -0400
Branch: REL9_6_STABLE [47fe7a753] 2019-07-02 13:35:14 -0400
-->
<para>
In <application>psql</application>, avoid offering incorrect tab
completion options
after <literal>SET <replaceable>variable</replaceable> =</literal>
(Tom Lane)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [4e784f351] 2019-07-24 18:14:43 -0400
Branch: REL_12_STABLE [d16e514be] 2019-07-24 18:14:45 -0400
Branch: REL_11_STABLE [cff13efb4] 2019-07-24 18:14:46 -0400
Branch: REL_10_STABLE [3808cf21f] 2019-07-24 18:14:27 -0400
-->
<para>
Fix a small memory leak in <application>psql</application>'s
<literal>\d</literal> command (Tom Lane)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [07b39083c] 2019-07-31 15:42:49 -0400
Branch: REL_12_STABLE [408f75938] 2019-07-31 15:42:50 -0400
Branch: REL_11_STABLE [c64e29705] 2019-07-31 15:42:50 -0400
Branch: REL_10_STABLE [7615afa48] 2019-07-31 15:42:50 -0400
Branch: REL9_6_STABLE [b31a98022] 2019-07-31 15:42:50 -0400
Branch: REL9_5_STABLE [9dd74ba5a] 2019-07-31 15:42:50 -0400
Branch: REL9_4_STABLE [4e10b6f82] 2019-07-31 15:42:50 -0400
-->
<para>
Fix <application>pg_dump</application> to ensure that custom operator
classes are dumped in the right order (Tom Lane)
</para>
<para>
If a user-defined opclass is the subtype opclass of a user-defined
range type, related objects were dumped in the wrong order,
producing an unrestorable dump. (The underlying failure to handle
opclass dependencies might manifest in other cases too, but this is
the only known case.)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: REL_11_STABLE [e991b6cce] 2019-07-26 15:17:03 -0400
Branch: REL_10_STABLE [46c193213] 2019-07-26 15:17:03 -0400
-->
<para>
Fix possible lockup in <application>pgbench</application> when
using <option>-R</option> option (Fabien Coelho)
</para>
</listitem>
<listitem>
<!--
Author: Michael Paquier <michael@paquier.xyz>
Branch: master [b2a3d706b] 2019-08-01 09:37:28 +0900
Branch: REL_12_STABLE [20f5cb195] 2019-08-01 09:37:48 +0900
Branch: REL_11_STABLE [a7eb28d0c] 2019-08-01 09:38:02 +0900
Branch: REL_10_STABLE [cb0074417] 2019-08-01 09:38:14 +0900
Branch: REL9_6_STABLE [957b822b5] 2019-08-01 09:38:20 +0900
Branch: REL9_5_STABLE [4536e494f] 2019-08-01 09:38:25 +0900
Branch: REL9_4_STABLE [eea28a3cb] 2019-08-01 09:38:29 +0900
-->
<para>
Fix <filename>contrib/passwordcheck</filename> to coexist with other
users of <varname>check_password_hook</varname> (Michael Paquier)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [f5a4ab23e] 2019-07-25 11:02:43 -0400
Branch: REL_12_STABLE [665329abe] 2019-07-25 11:02:57 -0400
Branch: REL_11_STABLE [5a1c61bdf] 2019-07-25 11:03:08 -0400
Branch: REL_10_STABLE [5c3d47287] 2019-07-25 11:03:13 -0400
Branch: REL9_6_STABLE [0a9ba5baa] 2019-07-25 11:03:21 -0400
Branch: REL9_5_STABLE [b22e24983] 2019-07-25 11:03:30 -0400
Branch: REL9_4_STABLE [0e259d4bc] 2019-07-25 11:03:37 -0400
-->
<para>
Fix <filename>contrib/sepgsql</filename> tests to work under recent
SELinux releases (Mike Palmiotto)
</para>
</listitem>
<listitem>
<!--
Author: Michael Paquier <michael@paquier.xyz>
Branch: master [7d81bdc8c] 2019-07-24 10:53:39 +0900
Branch: REL_12_STABLE [0ceb28da0] 2019-07-24 10:54:20 +0900
Branch: REL_11_STABLE [ca553394b] 2019-07-24 10:54:26 +0900
Branch: REL_10_STABLE [46fb7ff65] 2019-07-24 10:54:32 +0900
Branch: REL9_6_STABLE [c6f961bbb] 2019-07-24 10:54:39 +0900
-->
<para>
Improve stability of <filename>src/test/recovery</filename>
regression tests (Michael Paquier)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master Release: REL_12_BR [eb9812f27] 2019-05-21 13:11:57 -0400
Branch: REL_11_STABLE [8d21512dc] 2019-07-22 17:14:22 -0400
Branch: REL_10_STABLE [7ac7bf50c] 2019-07-22 17:14:22 -0400
Branch: REL9_6_STABLE [75348a733] 2019-07-22 17:14:22 -0400
Branch: REL9_5_STABLE [69c3d5191] 2019-07-22 17:14:22 -0400
Branch: REL9_4_STABLE [19f9a5aed] 2019-07-22 17:14:22 -0400
-->
<para>
Reduce <systemitem>stderr</systemitem> output
from <application>pg_upgrade</application>'s test script (Tom Lane)
</para>
</listitem>
<listitem>
<!--
Author: Noah Misch <noah@leadboat.com>
Branch: master Release: REL_12_BR [660a2b190] 2019-06-21 20:34:23 -0700
Branch: REL_11_STABLE [a40dca815] 2019-06-21 20:47:34 -0700
Branch: REL_10_STABLE [6121ba9d1] 2019-06-21 20:58:42 -0700
Branch: REL9_6_STABLE [186113b04] 2019-06-21 20:59:38 -0700
-->
<para>
Fix TAP tests to work with msys Perl, in cases where the build
directory is on a non-root msys mount point (Noah Misch)
</para>
</listitem>
<listitem>
<!--
Author: Michael Paquier <michael@paquier.xyz>
Branch: master [2b1394fc2] 2019-07-02 14:02:33 +0900
Branch: REL_12_STABLE [f2d069ce9] 2019-07-03 08:57:22 +0900
Branch: REL_11_STABLE [721963f24] 2019-07-03 08:57:39 +0900
Branch: REL_10_STABLE [0ce8e49b2] 2019-07-03 08:58:04 +0900
Branch: REL9_6_STABLE [78aaffd28] 2019-07-03 08:58:17 +0900
Branch: REL9_5_STABLE [3337fd192] 2019-07-03 08:58:28 +0900
Branch: REL9_4_STABLE [d49c127d9] 2019-07-03 08:58:34 +0900
-->
<para>
Support building Postgres with Microsoft Visual Studio 2019
(Haribabu Kommi)
</para>
</listitem>
<listitem>
<!--
Author: Andrew Dunstan <andrew@dunslane.net>
Branch: master [20e99cddd] 2019-07-25 11:38:43 -0400
Branch: REL_12_STABLE [6e5417d77] 2019-07-25 11:39:26 -0400
Branch: REL_11_STABLE [fe9e63284] 2019-07-25 11:39:34 -0400
Branch: REL_10_STABLE [165f4eecf] 2019-07-25 11:39:45 -0400
Branch: REL9_6_STABLE [09fa17160] 2019-07-25 11:40:09 -0400
Branch: REL9_5_STABLE [4f435f78d] 2019-07-25 11:40:23 -0400
Branch: REL9_4_STABLE [53fd0f04b] 2019-07-25 11:40:34 -0400
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [cb9bb1578] 2019-07-25 14:42:02 -0400
Branch: REL_12_STABLE [b24537046] 2019-07-25 14:42:08 -0400
Branch: REL_11_STABLE [e465d9d40] 2019-07-25 14:42:12 -0400
Branch: REL_10_STABLE [ed304d1e2] 2019-07-25 14:42:16 -0400
Branch: REL9_6_STABLE [3f1c6d048] 2019-07-25 14:42:21 -0400
Branch: REL9_5_STABLE [4583605e6] 2019-07-25 14:42:25 -0400
Branch: REL9_4_STABLE [7ea91ae19] 2019-07-25 14:42:30 -0400
-->
<para>
In Visual Studio builds, honor <literal>WindowsSDKVersion</literal>
environment variable, if that's set (Peifeng Qiu)
</para>
<para>
This fixes build failures in some configurations.
</para>
</listitem>
<listitem>
<!--
Author: Michael Paquier <michael@paquier.xyz>
Branch: master Release: REL_12_BR [d993e0fb8] 2019-06-26 10:44:46 +0900
Branch: REL_11_STABLE [0e08a3a1f] 2019-06-26 23:04:32 +0900
Branch: REL_10_STABLE [a55980559] 2019-06-26 23:05:06 +0900
Branch: REL9_6_STABLE [532960669] 2019-06-26 23:05:34 +0900
Branch: REL9_5_STABLE [d908a0087] 2019-06-26 23:05:54 +0900
Branch: REL9_4_STABLE [05b2758c3] 2019-06-26 23:06:14 +0900
-->
<para>
Support OpenSSL 1.1.0 and newer in Visual Studio builds
(Juan Jos&eacute; Santamar&iacute;a Flecha, Michael Paquier)
</para>
</listitem>
<listitem>
<!--
Author: Thomas Munro <tmunro@postgresql.org>
Branch: master Release: REL_12_BR [0089c3059] 2019-06-25 09:36:21 +1200
Branch: REL_11_STABLE [2839bf353] 2019-06-25 09:40:20 +1200
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<para>
Allow <application>make</application> options to be passed down
to <application>gmake</application> when non-GNU make is invoked at
the top level (Thomas Munro)
</para>
</listitem>
<listitem>
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Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [3754113f3] 2019-07-26 12:45:32 -0400
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<para>
Avoid choosing <literal>localtime</literal>
or <literal>posixrules</literal> as <varname>TimeZone</varname>
during <application>initdb</application> (Tom Lane)
</para>
<para>
In some cases <application>initdb</application> would choose one of
these artificial zone names over the <quote>real</quote> zone name.
Prefer any other match to the C library's timezone behavior over
these two.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [8ab66081c] 2019-07-26 13:07:08 -0400
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<para>
Adjust <structname>pg_timezone_names</structname> view to show
the <literal>Factory</literal> time zone if and only if it has a
short abbreviation (Tom Lane)
</para>
<para>
Historically, IANA set up this artificial zone with
an <quote>abbreviation</quote> like <literal>Local time zone must be
set--see zic manual page</literal>. Modern versions of the tzdb
database show <literal>-00</literal> instead, but some platforms
alter the data to show one or another of the historical phrases.
Show this zone only if it uses the modern abbreviation.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [f285322f9] 2019-07-17 18:26:23 -0400
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Branch: master [421466863] 2019-07-19 14:48:57 -0400
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<para>
Sync our copy of the timezone library with IANA tzcode release 2019b
(Tom Lane)
</para>
<para>
This adds support for <application>zic</application>'s new <option>-b
slim</option> option to reduce the size of the installed zone files.
We are not currently using that, but may enable it in future.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [93907478e] 2019-07-17 19:15:21 -0400
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<para>
Update time zone data files to <application>tzdata</application>
release 2019b for DST law changes in Brazil, plus
historical corrections for Hong Kong, Italy, and Palestine.
</para>
</listitem>
</itemizedlist>
</sect2>
</sect1>
<sect1 id="release-10-9">
<title>Release 10.9</title>