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+<!-- $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.488.2.17 2008/03/13 23:48:11 tgl Exp $ -->
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Typical markup:
<appendix id="release">
<title>Release Notes</title>
+ <para>
+ The release notes contain the significant changes in each
+ <productname>PostgreSQL</> release, with major features and migration
+ issues listed at the top. The release notes do not contain changes
+ that affect only a few users or changes that are internal and therefore not
+ user-visible. For example, the optimizer is improved in almost every
+ release, but the improvements are usually observed by users as simply
+ faster queries.
+ </para>
+
+ <para>
+ A complete list of changes for each release can be obtained by
+ viewing the <link linkend="cvs">CVS</link> logs for each release.
+ The <ulink
+ url="http://archives.postgresql.org/pgsql-committers/">pgsql-committers
+ email list</ulink> contains all source code changes as well. There is also
+ a <ulink url="http://developer.postgresql.org/cvsweb.cgi/pgsql/">web
+ interface</ulink> that shows changes to specific files.
+ <!-- we need a file containing the CVS logs for each release, and something
+ like the SVN web interface that groups commits but has branches -->
+ </para>
+
+ <para>
+ The name appearing next to each item represents the major developer for
+ that item. Of course all changes involve community discussion and patch
+ review, so each item is truly a community effort.
+ </para>
+
+ <sect1 id="release-8-2-7">
+ <title>Release 8.2.7</title>
+
+ <note>
+ <title>Release date</title>
+ <simpara>2008-03-17</simpara>
+ </note>
+
+ <para>
+ This release contains a variety of fixes from 8.2.6.
+ </para>
+
+ <sect2>
+ <title>Migration to Version 8.2.7</title>
+
+ <para>
+ A dump/restore is not required for those running 8.2.X.
+ However, you might need to <command>REINDEX</> indexes on textual
+ columns after updating, if you are affected by the Windows locale
+ issue described below.
+ </para>
+
+ </sect2>
+
+ <sect2>
+ <title>Changes</title>
+
+ <itemizedlist>
+
+ <listitem>
+ <para>
+ Fix character string comparison for Windows locales that consider
+ different character combinations as equal (Tom)
+ </para>
+
+ <para>
+ This fix applies only on Windows and only when using UTF-8
+ database encoding. The same fix was made for all other cases
+ over two years ago, but Windows with UTF-8 uses a separate code
+ path that was not updated. If you are using a locale that
+ considers some non-identical strings as equal, you may need to
+ <command>REINDEX</> to fix existing indexes on textual columns.
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ Repair potential deadlock between concurrent <command>VACUUM FULL</>
+ operations on different system catalogs (Tom)
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ Fix longstanding <command>LISTEN</>/<command>NOTIFY</>
+ race condition (Tom)
+ </para>
+
+ <para>
+ In rare cases a session that had just executed a
+ <command>LISTEN</> might not get a notification, even though
+ one would be expected because the concurrent transaction executing
+ <command>NOTIFY</> was observed to commit later.
+ </para>
+
+ <para>
+ A side effect of the fix is that a transaction that has executed
+ a not-yet-committed <command>LISTEN</> command will not see any
+ row in <structname>pg_listener</> for the <command>LISTEN</>,
+ should it choose to look; formerly it would have. This behavior
+ was never documented one way or the other, but it is possible that
+ some applications depend on the old behavior.
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ Disallow <command>LISTEN</> and <command>UNLISTEN</> within a
+ prepared transaction (Tom)
+ </para>
+
+ <para>
+ This was formerly allowed but trying to do it had various unpleasant
+ consequences, notably that the originating backend could not exit
+ as long as an <command>UNLISTEN</> remained uncommitted.
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ Disallow dropping a temporary table within a
+ prepared transaction (Heikki)
+ </para>
+
+ <para>
+ This was correctly disallowed by 8.1, but the check was inadvertently
+ broken in 8.2.
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ Fix rare crash when an error occurs during a query using a hash index
+ (Heikki)
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ Fix memory leaks in certain usages of set-returning functions (Neil)
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ Fix input of datetime values for February 29 in years BC (Tom)
+ </para>
+
+ <para>
+ The former coding was mistaken about which years were leap years.
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ Fix <quote>unrecognized node type</> error in some variants of
+ <command>ALTER OWNER</> (Tom)
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ Ensure <structname>pg_stat_activity</>.<structfield>waiting</> flag
+ is cleared when a lock wait is aborted (Tom)
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ Fix handling of process permissions on Windows Vista (Dave, Magnus)
+ </para>
+
+ <para>
+ In particular, this fix allows starting the server as the Administrator
+ user.
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ Update time zone data files to <application>tzdata</> release 2008a
+ (in particular, recent Chile changes); adjust timezone abbreviation
+ <literal>VET</> (Venezuela) to mean UTC-4:30, not UTC-4:00 (Tom)
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ Fix <application>pg_ctl</> to correctly extract the postmaster's port
+ number from command-line options (Itagaki Takahiro, Tom)
+ </para>
+
+ <para>
+ Previously, <literal>pg_ctl start -w</> could try to contact the
+ postmaster on the wrong port, leading to bogus reports of startup
+ failure.
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ Use <option>-fwrapv</> to defend against possible misoptimization
+ in recent <application>gcc</> versions (Tom)
+ </para>
+
+ <para>
+ This is known to be necessary when building <productname>PostgreSQL</>
+ with <application>gcc</> 4.3 or later.
+ </para>
+ </listitem>
+
+
+ <listitem>
+ <para>
+ Correctly enforce <varname>statement_timeout</> values longer
+ than <literal>INT_MAX</> microseconds (about 35 minutes) (Tom)
+ </para>
+
+ <para>
+ This bug affects only builds with <option>--enable-integer-datetimes</>.
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ Fix <quote>unexpected PARAM_SUBLINK ID</> planner error when
+ constant-folding simplifies a sub-select (Tom)
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ Fix logical errors in constraint-exclusion handling of <literal>IS
+ NULL</> and <literal>NOT</> expressions (Tom)
+ </para>
+
+ <para>
+ The planner would sometimes exclude partitions that should not
+ have been excluded because of the possibility of NULL results.
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ Fix another cause of <quote>failed to build any N-way joins</>
+ planner errors (Tom)
+ </para>
+
+ <para>
+ This could happen in cases where a clauseless join needed to be
+ forced before a join clause could be exploited.
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ Fix incorrect constant propagation in outer-join planning (Tom)
+ </para>
+
+ <para>
+ The planner could sometimes incorrectly conclude that a variable
+ could be constrained to be equal to a constant, leading
+ to wrong query results.
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ Fix display of constant expressions in <literal>ORDER BY</>
+ and <literal>GROUP BY</> (Tom)
+ </para>
+
+ <para>
+ An explictly casted constant would be shown incorrectly. This could
+ for example lead to corruption of a view definition during
+ dump and reload.
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ Fix <application>libpq</> to handle NOTICE messages correctly
+ during COPY OUT (Tom)
+ </para>
+
+ <para>
+ This failure has only been observed to occur when a user-defined
+ datatype's output routine issues a NOTICE, but there is no
+ guaranteee it couldn't happen due to other causes.
+ </para>
+ </listitem>
+
+ </itemizedlist>
+
+ </sect2>
+ </sect1>
+
<sect1 id="release-8-2-6">
<title>Release 8.2.6</title>
projects / thirdparty / postgresql.git / commitdiff
