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Update release notes for releases 9.0.2, 8.4.6, 8.3.13, 8.2.19, and 8.1.23.
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‎doc/src/sgml/release-8.1.sgml

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<!-- doc/src/sgml/release-8.1.sgml -->
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<!-- See header comment in release.sgml about typical markup -->
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<sect1 id="release-8-1-23">
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<title>Release 8.1.23</title>
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<note>
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<title>Release date</title>
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<simpara>2010-12-16</simpara>
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</note>
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<para>
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This release contains a variety of fixes from 8.1.22.
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For information about new features in the 8.1 major release, see
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<xref linkend="release-8-1">.
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</para>
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<para>
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This is expected to be the last <productname>PostgreSQL</> release
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in the 8.1.X series. Users are encouraged to update to a newer
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release branch soon.
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</para>
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<sect2>
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<title>Migration to Version 8.1.23</title>
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<para>
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A dump/restore is not required for those running 8.1.X.
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However, if you are upgrading from a version earlier than 8.1.18,
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see the release notes for 8.1.18.
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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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Force the default
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<link linkend="guc-wal-sync-method"><varname>wal_sync_method</></link>
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to be <literal>fdatasync</> on Linux (Tom Lane, Marti Raudsepp)
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</para>
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<para>
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The default on Linux has actually been <literal>fdatasync</> for many
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years, but recent kernel changes caused <productname>PostgreSQL</> to
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choose <literal>open_datasync</> instead. This choice did not result
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in any performance improvement, and caused outright failures on
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certain filesystems, notably <literal>ext4</> with the
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<literal>data=journal</> mount option.
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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 recovery from base backup when the starting checkpoint WAL record
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is not in the same WAL segment as its redo point (Jeff Davis)
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</para>
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</listitem>
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<listitem>
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<para>
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Add support for detecting register-stack overrun on <literal>IA64</>
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(Tom Lane)
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</para>
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<para>
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The <literal>IA64</> architecture has two hardware stacks. Full
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prevention of stack-overrun failures requires checking both.
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</para>
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</listitem>
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<listitem>
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<para>
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Add a check for stack overflow in <function>copyObject()</> (Tom Lane)
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</para>
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<para>
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Certain code paths could crash due to stack overflow given a
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sufficiently complex query.
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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 detection of page splits in temporary GiST indexes (Heikki
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Linnakangas)
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</para>
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<para>
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It is possible to have a <quote>concurrent</> page split in a
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temporary index, if for example there is an open cursor scanning the
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index when an insertion is done. GiST failed to detect this case and
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hence could deliver wrong results when execution of the cursor
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continued.
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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 memory leakage while <command>ANALYZE</>'ing complex index
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expressions (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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Ensure an index that uses a whole-row Var still depends on its table
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(Tom Lane)
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</para>
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<para>
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An index declared like <literal>create index i on t (foo(t.*))</>
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would not automatically get dropped when its table was dropped.
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</para>
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</listitem>
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<listitem>
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<para>
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Do not <quote>inline</> a SQL function with multiple <literal>OUT</>
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parameters (Tom Lane)
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</para>
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<para>
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This avoids a possible crash due to loss of information about the
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expected result rowtype.
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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 constant-folding of <literal>COALESCE()</> expressions (Tom Lane)
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</para>
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<para>
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The planner would sometimes attempt to evaluate sub-expressions that
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in fact could never be reached, possibly leading to unexpected errors.
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</para>
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</listitem>
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<listitem>
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<para>
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Add print functionality for <structname>InhRelation</> nodes (Tom Lane)
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</para>
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<para>
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This avoids a failure when <varname>debug_print_parse</> is enabled
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and certain types of query are executed.
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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 incorrect calculation of distance from a point to a horizontal
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line segment (Tom Lane)
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</para>
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<para>
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This bug affected several different geometric distance-measurement
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operators.
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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>PL/pgSQL</>'s handling of <quote>simple</>
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expressions to not fail in recursion or error-recovery cases (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 bug in <filename>contrib/cube</>'s GiST picksplit algorithm
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(Alexander Korotkov)
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</para>
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<para>
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This could result in considerable inefficiency, though not actually
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incorrect answers, in a GiST index on a <type>cube</> column.
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If you have such an index, consider <command>REINDEX</>ing it after
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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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Don't emit <quote>identifier will be truncated</> notices in
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<filename>contrib/dblink</> except when creating new connections
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(Itagaki Takahiro)
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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 coredump on missing public key in
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<filename>contrib/pgcrypto</> (Marti Raudsepp)
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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 memory leak in <filename>contrib/xml2</>'s XPath query functions
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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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Update time zone data files to <application>tzdata</> release 2010o
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for DST law changes in Fiji and Samoa;
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also historical corrections for Hong Kong.
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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-8-1-22">
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<title>Release 8.1.22</title>
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