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<sect1 id="release-8-2-21">

<title>Release 8.2.21</title>

<note>

<title>Release Date</title>

<simpara>2011-04-18</simpara>

</note>

<para>

This release contains a variety of fixes from 8.2.20.

For information about new features in the 8.2 major release, see

<xref linkend="release-8-2">.

</para>

<sect2>

<title>Migration to Version 8.2.21</title>

<para>

A dump/restore is not required for those running 8.2.X.

However, if you are upgrading from a version earlier than 8.2.14,

see the release notes for 8.2.14.

</para>

</sect2>

<sect2>

<title>Changes</title>

<itemizedlist>

<listitem>

<para>

Avoid potential deadlock during catalog cache initialization

(Nikhil Sontakke)

</para>

<para>

In some cases the cache loading code would acquire share lock on a

system index before locking the index's catalog. This could deadlock

against processes trying to acquire exclusive locks in the other,

more standard order.

</para>

</listitem>

<listitem>

<para>

Fix dangling-pointer problem in <literal>BEFORE ROW UPDATE</> trigger

handling when there was a concurrent update to the target tuple

(Tom Lane)

</para>

<para>

This bug has been observed to result in intermittent <quote>cannot

extract system attribute from virtual tuple</> failures while trying to

do <literal>UPDATE RETURNING ctid</>. There is a very small probability

of more serious errors, such as generating incorrect index entries for

the updated tuple.

</para>

</listitem>

<listitem>

<para>

Disallow <command>DROP TABLE</> when there are pending deferred trigger

events for the table (Tom Lane)

</para>

<para>

Formerly the <command>DROP</> would go through, leading to

<quote>could not open relation with OID nnn</> errors when the

triggers were eventually fired.

</para>

</listitem>

<listitem>

<para>

Fix PL/Python memory leak involving array slices (Daniel Popowich)

</para>

</listitem>

<listitem>

<para>

Fix <application>pg_restore</> to cope with long lines (over 1KB) in

TOC files (Tom Lane)

</para>

</listitem>

<listitem>

<para>

Put in more safeguards against crashing due to division-by-zero

with overly enthusiastic compiler optimization (Aurelien Jarno)

</para>

</listitem>

<listitem>

<para>

Support use of dlopen() in FreeBSD and OpenBSD on MIPS (Tom Lane)

</para>

<para>

There was a hard-wired assumption that this system function was not

available on MIPS hardware on these systems. Use a compile-time test

instead, since more recent versions have it.

</para>

</listitem>

<listitem>

<para>

Fix compilation failures on HP-UX (Heikki Linnakangas)

</para>

</listitem>

<listitem>

<para>

Fix path separator used by <application>pg_regress</> on Cygwin

(Andrew Dunstan)

</para>

</listitem>

<listitem>

<para>

Update time zone data files to <application>tzdata</> release 2011f

for DST law changes in Chile, Cuba, Falkland Islands, Morocco, Samoa,

and Turkey; also historical corrections for South Australia, Alaska,

and Hawaii.

</para>

</listitem>

</itemizedlist>

</sect2>

</sect1>

<sect1 id="release-8-2-20">

<title>Release 8.2.20</title>

<note>

<title>Releasedate</title>

<title>ReleaseDate</title>

<simpara>2011-01-31</simpara>

</note>

<title>Release 8.2.19</title>

<note>

<title>Releasedate</title>

<title>ReleaseDate</title>

<simpara>2010-12-16</simpara>

</note>

<title>Release 8.2.18</title>

<note>

<title>Releasedate</title>

<title>ReleaseDate</title>

<simpara>2010-10-04</simpara>

</note>

<title>Release 8.2.17</title>

<note>

<title>Releasedate</title>

<title>ReleaseDate</title>

<simpara>2010-05-17</simpara>

</note>

<title>Release 8.2.16</title>

<note>

<title>Releasedate</title>

<title>ReleaseDate</title>

<simpara>2010-03-15</simpara>

</note>

<title>Release 8.2.15</title>

<note>

<title>Releasedate</title>

<title>ReleaseDate</title>

<simpara>2009-12-14</simpara>

</note>

<title>Release 8.2.14</title>

<note>

<title>Releasedate</title>

<title>ReleaseDate</title>

<simpara>2009-09-09</simpara>

</note>

<title>Release 8.2.13</title>

<note>

<title>Releasedate</title>

<title>ReleaseDate</title>

<simpara>2009-03-16</simpara>

</note>

<title>Release 8.2.12</title>

<note>

<title>Releasedate</title>

<title>ReleaseDate</title>

<simpara>2009-02-02</simpara>

</note>

<title>Release 8.2.11</title>

<note>

<title>Releasedate</title>

<title>ReleaseDate</title>

<simpara>2008-11-03</simpara>

</note>

<title>Release 8.2.10</title>

<note>

<title>Releasedate</title>

<title>ReleaseDate</title>

<simpara>2008-09-22</simpara>

</note>

<title>Release 8.2.9</title>

<note>

<title>Releasedate</title>

<title>ReleaseDate</title>

<simpara>2008-06-12</simpara>

</note>

<title>Release 8.2.8</title>

<note>

<title>Releasedate</title>

<title>ReleaseDate</title>

<simpara>never released</simpara>

</note>

<title>Release 8.2.7</title>

<note>

<title>Releasedate</title>

<title>ReleaseDate</title>

<simpara>2008-03-17</simpara>

</note>

<title>Release 8.2.6</title>

<note>

<title>Releasedate</title>

<title>ReleaseDate</title>

<simpara>2008-01-07</simpara>

</note>

<title>Release 8.2.5</title>

<note>

<title>Releasedate</title>

<title>ReleaseDate</title>

<simpara>2007-09-17</simpara>

</note>

<title>Release 8.2.4</title>

<note>

<title>Releasedate</title>

<title>ReleaseDate</title>

<simpara>2007-04-23</simpara>

</note>

<title>Release 8.2.3</title>

<note>

<title>Releasedate</title>

<title>ReleaseDate</title>

<simpara>2007-02-07</simpara>

</note>

<title>Release 8.2.2</title>

<note>

<title>Releasedate</title>

<title>ReleaseDate</title>

<simpara>2007-02-05</simpara>

</note>

<title>Release 8.2.1</title>

<note>

<title>Releasedate</title>

<title>ReleaseDate</title>

<simpara>2007-01-08</simpara>

</note>

<title>Release 8.2</title>

<note>

<title>Releasedate</title>

<title>ReleaseDate</title>

<simpara>2006-12-05</simpara>

</note>