Release notes for 9.5.4, 9.4.9, 9.3.14, 9.2.18, 9.1.23.

doc/src/sgml/release-9.1.sgml

@@ -1,6 +1,268 @@
 <!-- doc/src/sgml/release-9.1.sgml -->
 <!-- See header comment in release.sgml about typical markup -->
 
+ <sect1 id="release-9-1-23">
+  <title>Release 9.1.23</title>
+
+  <note>
+  <title>Release Date</title>
+  <simpara>2016-08-11</simpara>
+  </note>
+
+  <para>
+   This release contains a variety of fixes from 9.1.22.
+   For information about new features in the 9.1 major release, see
+   <xref linkend="release-9-1">.
+  </para>
+
+  <para>
+   The <productname>PostgreSQL</> community will stop releasing updates
+   for the 9.1.X release series in September 2016.
+   Users are encouraged to update to a newer release branch soon.
+  </para>
+
+  <sect2>
+   <title>Migration to Version 9.1.23</title>
+
+   <para>
+    A dump/restore is not required for those running 9.1.X.
+   </para>
+
+   <para>
+    However, if you are upgrading from a version earlier than 9.1.16,
+    see <xref linkend="release-9-1-16">.
+   </para>
+
+  </sect2>
+
+  <sect2>
+   <title>Changes</title>
+
+   <itemizedlist>
+
+    <listitem>
+     <para>
+      Fix corner-case misbehaviors for <literal>IS NULL</>/<literal>IS NOT
+      NULL</> applied to nested composite values (Andrew Gierth, Tom Lane)
+     </para>
+
+     <para>
+      The SQL standard specifies that <literal>IS NULL</> should return
+      TRUE for a row of all null values (thus <literal>ROW(NULL,NULL) IS
+      NULL</> yields TRUE), but this is not meant to apply recursively
+      (thus <literal>ROW(NULL, ROW(NULL,NULL)) IS NULL</> yields FALSE).
+      The core executor got this right, but certain planner optimizations
+      treated the test as recursive (thus producing TRUE in both cases),
+      and <filename>contrib/postgres_fdw</> could produce remote queries
+      that misbehaved similarly.
+     </para>
+    </listitem>
+
+    <listitem>
+     <para>
+      Make the <type>inet</> and <type>cidr</> data types properly reject
+      IPv6 addresses with too many colon-separated fields (Tom Lane)
+     </para>
+    </listitem>
+
+    <listitem>
+     <para>
+      Prevent crash in <function>close_ps()</>
+      (the <type>point</> <literal>##</> <type>lseg</> operator)
+      for NaN input coordinates (Tom Lane)
+     </para>
+
+     <para>
+      Make it return NULL instead of crashing.
+     </para>
+    </listitem>
+
+    <listitem>
+     <para>
+      Avoid unsafe intermediate state during expensive paths
+      through <function>heap_update()</> (Masahiko Sawada, Andres Freund)
+     </para>
+
+     <para>
+      Previously, these cases locked the target tuple (by setting its XMAX)
+      but did not WAL-log that action, thus risking data integrity problems
+      if the page were spilled to disk and then a database crash occurred
+      before the tuple update could be completed.
+     </para>
+    </listitem>
+
+    <listitem>
+     <para>
+      Avoid consuming a transaction ID during <command>VACUUM</>
+      (Alexander Korotkov)
+     </para>
+
+     <para>
+      Some cases in <command>VACUUM</> unnecessarily caused an XID to be
+      assigned to the current transaction.  Normally this is negligible,
+      but if one is up against the XID wraparound limit, consuming more
+      XIDs during anti-wraparound vacuums is a very bad thing.
+     </para>
+    </listitem>
+
+    <listitem>
+     <para>
+      Avoid canceling hot-standby queries during <command>VACUUM FREEZE</>
+      (Simon Riggs, &Aacute;lvaro Herrera)
+     </para>
+
+     <para>
+      <command>VACUUM FREEZE</> on an otherwise-idle master server could
+      result in unnecessary cancellations of queries on its standby
+      servers.
+     </para>
+    </listitem>
+
+    <listitem>
+     <para>
+      When a manual <command>ANALYZE</> specifies a column list, don't
+      reset the table's <literal>changes_since_analyze</> counter
+      (Tom Lane)
+     </para>
+
+     <para>
+      If we're only analyzing some columns, we should not prevent routine
+      auto-analyze from happening for the other columns.
+     </para>
+    </listitem>
+
+    <listitem>
+     <para>
+      Fix <command>ANALYZE</>'s overestimation of <literal>n_distinct</>
+      for a unique or nearly-unique column with many null entries (Tom
+      Lane)
+     </para>
+
+     <para>
+      The nulls could get counted as though they were themselves distinct
+      values, leading to serious planner misestimates in some types of
+      queries.
+     </para>
+    </listitem>
+
+    <listitem>
+     <para>
+      Prevent autovacuum from starting multiple workers for the same shared
+      catalog (&Aacute;lvaro Herrera)
+     </para>
+
+     <para>
+      Normally this isn't much of a problem because the vacuum doesn't take
+      long anyway; but in the case of a severely bloated catalog, it could
+      result in all but one worker uselessly waiting instead of doing
+      useful work on other tables.
+     </para>
+    </listitem>
+
+    <listitem>
+     <para>
+      Fix <filename>contrib/btree_gin</> to handle the smallest
+      possible <type>bigint</> value correctly (Peter Eisentraut)
+     </para>
+    </listitem>
+
+    <listitem>
+     <para>
+      Teach libpq to correctly decode server version from future servers
+      (Peter Eisentraut)
+     </para>
+
+     <para>
+      It's planned to switch to two-part instead of three-part server
+      version numbers for releases after 9.6.  Make sure
+      that <function>PQserverVersion()</> returns the correct value for
+      such cases.
+     </para>
+    </listitem>
+
+    <listitem>
+     <para>
+      Fix <application>ecpg</>'s code for <literal>unsigned long long</>
+      array elements (Michael Meskes)
+     </para>
+    </listitem>
+
+    <listitem>
+     <para>
+      Make <application>pg_basebackup</> accept <literal>-Z 0</> as
+      specifying no compression (Fujii Masao)
+     </para>
+    </listitem>
+
+    <listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+Branch: REL9_1_STABLE [d56c02f1a] 2016-06-19 13:45:03 -0400
+Branch: REL9_1_STABLE [354b3a3ac] 2016-06-19 14:01:17 -0400
+-->
+     <para>
+      Revert to the old heuristic timeout for <literal>pg_ctl start -w</>
+      (Tom Lane)
+     </para>
+
+     <para>
+      The new method adopted as of release 9.1.20 does not work
+      when <varname>silent_mode</> is enabled, so go back to the old way.
+     </para>
+    </listitem>
+
+    <listitem>
+     <para>
+      Fix makefiles' rule for building AIX shared libraries to be safe for
+      parallel make (Noah Misch)
+     </para>
+    </listitem>
+
+    <listitem>
+     <para>
+      Fix TAP tests and MSVC scripts to work when build directory's path
+      name contains spaces (Michael Paquier, Kyotaro Horiguchi)
+     </para>
+    </listitem>
+
+    <listitem>
+     <para>
+      Make regression tests safe for Danish and Welsh locales (Jeff Janes,
+      Tom Lane)
+     </para>
+
+     <para>
+      Change some test data that triggered the unusual sorting rules of
+      these locales.
+     </para>
+    </listitem>
+
+    <listitem>
+     <para>
+      Update our copy of the timezone code to match
+      IANA's <application>tzcode</> release 2016c (Tom Lane)
+     </para>
+
+     <para>
+      This is needed to cope with anticipated future changes in the time
+      zone data files.  It also fixes some corner-case bugs in coping with
+      unusual time zones.
+     </para>
+    </listitem>
+
+    <listitem>
+     <para>
+      Update time zone data files to <application>tzdata</> release 2016f
+      for DST law changes in Kemerovo and Novosibirsk, plus historical
+      corrections for Azerbaijan, Belarus, and Morocco.
+     </para>
+    </listitem>
+
+   </itemizedlist>
+
+  </sect2>
+ </sect1>
+
  <sect1 id="release-9-1-22">
   <title>Release 9.1.22</title>