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Draft release notes for 9.2.4, 9.1.9, 9.0.13, 8.4.17.
Covers commits through today. Not back-patching into back branches yet, since this is just for people to review in advance.
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‎doc/src/sgml/release-8.4.sgml

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<!-- doc/src/sgml/release-8.4.sgml -->
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<!-- See header comment in release.sgml about typical markup -->
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<sect1 id="release-8-4-17">
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<title>Release 8.4.17</title>
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<note>
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<title>Release Date</title>
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<simpara>2013-04-04</simpara>
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</note>
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<para>
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This release contains a variety of fixes from 8.4.16.
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For information about new features in the 8.4 major release, see
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<xref linkend="release-8-4">.
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</para>
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<sect2>
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<title>Migration to Version 8.4.17</title>
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<para>
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A dump/restore is not required for those running 8.4.X.
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</para>
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<para>
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However, this release corrects several errors in management of GiST
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indexes. After installing this update, it is advisable to
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<command>REINDEX</> any GiST indexes that meet one or more of the
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conditions described below.
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</para>
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<para>
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Also, if you are upgrading from a version earlier than 8.4.10,
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see the release notes for 8.4.10.
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</para>
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</sect2>
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<sect2>
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<title>Changes</title>
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<itemizedlist>
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<listitem>
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<para>
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Reset OpenSSL randomness state in each postmaster child process
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(Marko Kreen)
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</para>
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<para>
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This avoids a scenario wherein random numbers generated by
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<filename>contrib/pgcrypto</> functions might be relatively easy for
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another database user to guess. The risk is only significant when
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the postmaster is configured with <varname>ssl</> = <literal>on</>
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but most connections don't use SSL encryption. (CVE-2013-1900)
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</para>
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</listitem>
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<listitem>
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<para>
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Fix GiST indexes to not use <quote>fuzzy</> geometric comparisons when
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it's not appropriate to do so (Alexander Korotkov)
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</para>
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<para>
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The core geometric types perform comparisons using <quote>fuzzy</>
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equality, but <function>gist_box_same</> must do exact comparisons,
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else GiST indexes using it might become inconsistent. After installing
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this update, users should <command>REINDEX</> any GiST indexes on
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<type>box</>, <type>polygon</>, <type>circle</>, or <type>point</>
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columns, since all of these use <function>gist_box_same</>.
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</para>
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</listitem>
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<listitem>
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<para>
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Fix erroneous range-union and penalty logic in GiST indexes that use
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<filename>contrib/btree_gist</> for variable-width data types, that is
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<type>text</>, <type>bytea</>, <type>bit</>, and <type>numeric</>
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columns (Tom Lane)
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</para>
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<para>
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These errors could result in inconsistent indexes in which some keys
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that are present would not be found by searches, and also in useless
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index bloat. Users are advised to <command>REINDEX</> such indexes
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after installing this update.
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</para>
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</listitem>
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<listitem>
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<para>
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Fix bugs in GiST page splitting code for multi-column indexes
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(Tom Lane)
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</para>
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<para>
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These errors could result in inconsistent indexes in which some keys
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that are present would not be found by searches, and also in indexes
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that are unnecessarily inefficient to search. Users are advised to
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<command>REINDEX</> multi-column GiST indexes after installing this
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update.
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</para>
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</listitem>
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<listitem>
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<para>
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Fix infinite-loop risk in regular expression compilation (Tom Lane,
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Don Porter)
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</para>
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</listitem>
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<listitem>
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<para>
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Fix potential null-pointer dereference in regular expression compilation
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(Tom Lane)
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</para>
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</listitem>
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<listitem>
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<para>
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Fix <function>to_char()</> to use ASCII-only case-folding rules where
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appropriate (Tom Lane)
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</para>
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<para>
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This fixes misbehavior of some template patterns that should be
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locale-independent, but mishandled <quote><literal>I</></quote> and
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<quote><literal>i</></quote> in Turkish locales.
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</para>
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</listitem>
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<listitem>
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<para>
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Fix unwanted rejection of timestamp <literal>1999-12-31 24:00:00</>
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(Tom Lane)
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</para>
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</listitem>
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<listitem>
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<para>
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Remove useless <quote>picksplit doesn't support secondary split</> log
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messages (Josh Hansen, Tom Lane)
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</para>
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<para>
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This message seems to have been added in expectation of code that was
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never written, and probably never will be, since GiST's default
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handling of secondary splits is actually pretty good. So stop nagging
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end users about it.
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</para>
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</listitem>
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<listitem>
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<para>
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Fix possible failure to send a session's last few transaction
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commit/abort counts to the statistics collector (Tom Lane)
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</para>
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</listitem>
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<listitem>
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<para>
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Eliminate memory leaks in PL/Perl's <function>spi_prepare()</> function
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(Alex Hunsaker, Tom Lane)
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</para>
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</listitem>
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<listitem>
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<para>
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Fix <application>pg_dumpall</> to handle database names containing
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<quote><literal>=</></quote> correctly (Heikki Linnakangas)
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</para>
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</listitem>
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<listitem>
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<para>
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Avoid crash in <application>pg_dump</> when an incorrect connection
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string is given (Heikki Linnakangas)
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</para>
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</listitem>
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<listitem>
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<para>
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Ignore invalid indexes in <application>pg_dump</> (Michael Paquier)
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</para>
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<para>
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Dumping invalid indexes can cause problems at restore time, for example
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if the reason the index creation failed was because it tried to enforce
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a uniqueness condition not satisfied by the table's data. Also, if the
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index creation is in fact still in progress, it seems reasonable to
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consider it to be an uncommitted DDL change, which
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<application>pg_dump</> wouldn't be expected to dump anyway.
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</para>
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</listitem>
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<listitem>
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<para>
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Fix <filename>contrib/pg_trgm</>'s <function>similarity()</> function
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to return zero for trigram-less strings (Tom Lane)
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</para>
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<para>
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Previously it returned <literal>NaN</> due to internal division by zero.
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</para>
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</listitem>
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<listitem>
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<para>
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Update time zone data files to <application>tzdata</> release 2013b
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for DST law changes in Chile, Haiti, Morocco, Paraguay, and some
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Russian areas. Also, historical zone data corrections for numerous
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places.
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</para>
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<para>
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Also, update the time zone abbreviation files for recent changes in
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Russia and elsewhere: <literal>CHOT</>, <literal>GET</>,
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<literal>IRKT</>, <literal>KGT</>, <literal>KRAT</>, <literal>MAGT</>,
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<literal>MAWT</>, <literal>MSK</>, <literal>NOVT</>, <literal>OMST</>,
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<literal>TKT</>, <literal>VLAT</>, <literal>WST</>, <literal>YAKT</>,
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<literal>YEKT</> now follow their current meanings, and
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<literal>VOLT</> (Europe/Volgograd) and <literal>MIST</>
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(Antarctica/Macquarie) are added to the default abbreviations list.
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</para>
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</listitem>
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</itemizedlist>
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</sect2>
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</sect1>
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<sect1 id="release-8-4-16">
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<title>Release 8.4.16</title>
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