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