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Commite3e869c

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committed
Release notes for 9.6.1, 9.5.5, 9.4.10, 9.3.15, 9.2.19, 9.1.24.
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‎doc/src/sgml/release-9.1.sgml

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<!-- doc/src/sgml/release-9.1.sgml -->
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<!-- See header comment in release.sgml about typical markup -->
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<sect1 id="release-9-1-24">
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<title>Release 9.1.24</title>
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<note>
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<title>Release Date</title>
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<simpara>2016-10-27</simpara>
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</note>
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<para>
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This release contains a variety of fixes from 9.1.23.
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For information about new features in the 9.1 major release, see
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<xref linkend="release-9-1">.
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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 9.1.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 9.1.24</title>
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<para>
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A dump/restore is not required for those running 9.1.X.
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</para>
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<para>
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However, if you are upgrading from a version earlier than 9.1.16,
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see <xref linkend="release-9-1-16">.
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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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Fix EvalPlanQual rechecks involving CTE scans (Tom Lane)
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</para>
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<para>
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The recheck would always see the CTE as returning no rows, typically
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leading to failure to update rows that were recently updated.
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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 improper repetition of previous results from hashed aggregation in
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a subquery (Andrew Gierth)
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</para>
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<para>
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The test to see if we can reuse a previously-computed hash table of
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the aggregate state values neglected the possibility of an outer query
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reference appearing in an aggregate argument expression. A change in
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the value of such a reference should lead to recalculating the hash
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table, but did not.
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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 timeout length when <command>VACUUM</> is waiting for exclusive
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table lock so that it can truncate the table (Simon Riggs)
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</para>
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<para>
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The timeout was meant to be 50 milliseconds, but it was actually only
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50 microseconds, causing <command>VACUUM</> to give up on truncation
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much more easily than intended. Set it to the intended value.
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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 artificial restrictions on the values accepted
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by <function>numeric_in()</> and <function>numeric_recv()</>
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(Tom Lane)
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</para>
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<para>
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We allow numeric values up to the limit of the storage format (more
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than <literal>1e100000</>), so it seems fairly pointless
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that <function>numeric_in()</> rejected scientific-notation exponents
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above 1000. Likewise, it was silly for <function>numeric_recv()</> to
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reject more than 1000 digits in an input value.
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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 very-low-probability data corruption due to testing tuple
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visibility without holding buffer lock (Thomas Munro, Peter Geoghegan,
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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 file descriptor leakage when truncating a temporary relation of
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more than 1GB (Andres Freund)
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</para>
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</listitem>
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<listitem>
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<para>
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Disallow starting a standalone backend with <literal>standby_mode</>
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turned on (Michael Paquier)
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</para>
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<para>
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This can't do anything useful, since there will be no WAL receiver
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process to fetch more WAL data; and it could result in misbehavior
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in code that wasn't designed with this situation in mind.
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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 try to share SSL contexts across multiple connections
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in <application>libpq</> (Heikki Linnakangas)
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</para>
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<para>
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This led to assorted corner-case bugs, particularly when trying to use
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different SSL parameters for different connections.
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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 corner-case memory leak in <application>libpq</> (Tom Lane)
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</para>
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<para>
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The reported problem involved leaking an error report
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during <function>PQreset()</>, but there might be related cases.
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</para>
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</listitem>
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<listitem>
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<para>
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Make <application>ecpg</>'s <option>--help</> and <option>--version</>
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options work consistently with our other executables (Haribabu Kommi)
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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/intarray/bench/bench.pl</> to print the results
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of the <command>EXPLAIN</> it does when given the <option>-e</> option
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(Daniel Gustafsson)
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</para>
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</listitem>
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<listitem>
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<para>
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Prevent failure of obsolete dynamic time zone abbreviations (Tom Lane)
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</para>
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<para>
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If a dynamic time zone abbreviation does not match any entry in the
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referenced time zone, treat it as equivalent to the time zone name.
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This avoids unexpected failures when IANA removes abbreviations from
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their time zone database, as they did in <application>tzdata</>
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release 2016f and seem likely to do again in the future. The
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consequences were not limited to not recognizing the individual
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abbreviation; any mismatch caused
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the <structname>pg_timezone_abbrevs</> view to fail altogether.
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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 2016h
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for DST law changes in Palestine and Turkey, plus historical
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corrections for Turkey and some regions of Russia.
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Switch to numeric abbreviations for some time zones in Antarctica,
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the former Soviet Union, and Sri Lanka.
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</para>
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<para>
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The IANA time zone database previously provided textual abbreviations
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for all time zones, sometimes making up abbreviations that have little
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or no currency among the local population. They are in process of
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reversing that policy in favor of using numeric UTC offsets in zones
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where there is no evidence of real-world use of an English
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abbreviation. At least for the time being, <productname>PostgreSQL</>
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will continue to accept such removed abbreviations for timestamp input.
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But they will not be shown in the <structname>pg_timezone_names</>
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view nor used for output.
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</para>
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<para>
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In this update, <literal>AMT</> is no longer shown as being in use to
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mean Armenia Time. Therefore, we have changed the <literal>Default</>
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abbreviation set to interpret it as Amazon Time, thus UTC-4 not UTC+4.
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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-9-1-23">
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<title>Release 9.1.23</title>
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<para>
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This dodges a portability problem on FreeBSD-derived platforms
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(includingOS X).
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(includingmacOS).
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</para>
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</listitem>
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<listitem>
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<para>
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Warn ifOS X's <function>setlocale()</> starts an unwanted extra
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Warn ifmacOS's <function>setlocale()</> starts an unwanted extra
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thread inside the postmaster (Noah Misch)
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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 linking of <application>libpython</> onOS X (Tom Lane)
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Fix linking of <application>libpython</> onmacOS (Tom Lane)
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</para>
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<para>
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<listitem>
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<para>
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Fix incorrect quoting of log file name inMac OS X start script
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Fix incorrect quoting of log file name inmacOS start script
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(Sidar Lopez)
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</para>
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</listitem>

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