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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>E.130. Release 9.1.4</title><link rel="stylesheet" type="text/css" href="stylesheet.css" /><link rev="made" href="pgsql-docs@postgresql.org" /><meta name="generator" content="DocBook XSL Stylesheets V1.79.1" /><link rel="prev" href="release-9-1-5.html" title="E.129. Release 9.1.5" /><link rel="next" href="release-9-1-3.html" title="E.131. Release 9.1.3" /></head><body><div xmlns="http://www.w3.org/TR/xhtml1/transitional" class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">E.130. Release 9.1.4</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="release-9-1-5.html" title="E.129. Release 9.1.5">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="release.html" title="Appendix E. Release Notes">Up</a></td><th width="60%" align="center">Appendix E. Release Notes</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 11.1 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="release-9-1-3.html" title="E.131. Release 9.1.3">Next</a></td></tr></table><hr></hr></div><div class="sect1" id="RELEASE-9-1-4"><div class="titlepage"><div><div><h2 class="title" style="clear: both">E.130. Release 9.1.4</h2></div></div></div><div class="toc"><dl class="toc"><dt><span class="sect2"><a href="release-9-1-4.html#id-1.11.6.134.4">E.130.1. Migration to Version 9.1.4</a></span></dt><dt><span class="sect2"><a href="release-9-1-4.html#id-1.11.6.134.5">E.130.2. Changes</a></span></dt></dl></div><p><strong>Release date: </strong>2012-06-04</p><p>
   This release contains a variety of fixes from 9.1.3.
   For information about new features in the 9.1 major release, see
   <a class="xref" href="release-9-1.html" title="E.134. Release 9.1">Section E.134</a>.
  </p><div class="sect2" id="id-1.11.6.134.4"><div class="titlepage"><div><div><h3 class="title">E.130.1. Migration to Version 9.1.4</h3></div></div></div><p>
    A dump/restore is not required for those running 9.1.X.
   </p><p>
    However, if you use the <code class="type">citext</code> data type, and you upgraded
    from a previous major release by running <span class="application">pg_upgrade</span>,
    you should run <code class="literal">CREATE EXTENSION citext FROM unpackaged</code>
    to avoid collation-related failures in <code class="type">citext</code> operations.
    The same is necessary if you restore a dump from a pre-9.1 database
    that contains an instance of the <code class="type">citext</code> data type.
    If you've already run the <code class="command">CREATE EXTENSION</code> command before
    upgrading to 9.1.4, you will instead need to do manual catalog updates
    as explained in the third changelog item below.
   </p><p>
    Also, if you are upgrading from a version earlier than 9.1.2,
    see <a class="xref" href="release-9-1-2.html" title="E.132. Release 9.1.2">Section E.132</a>.
   </p></div><div class="sect2" id="id-1.11.6.134.5"><div class="titlepage"><div><div><h3 class="title">E.130.2. Changes</h3></div></div></div><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p>
      Fix incorrect password transformation in
      <code class="filename">contrib/pgcrypto</code>'s DES <code class="function">crypt()</code> function
      (Solar Designer)
     </p><p>
      If a password string contained the byte value <code class="literal">0x80</code>, the
      remainder of the password was ignored, causing the password to be much
      weaker than it appeared.  With this fix, the rest of the string is
      properly included in the DES hash.  Any stored password values that are
      affected by this bug will thus no longer match, so the stored values may
      need to be updated.  (CVE-2012-2143)
     </p></li><li class="listitem"><p>
      Ignore <code class="literal">SECURITY DEFINER</code> and <code class="literal">SET</code> attributes for
      a procedural language's call handler (Tom Lane)
     </p><p>
      Applying such attributes to a call handler could crash the server.
      (CVE-2012-2655)
     </p></li><li class="listitem"><p>
      Make <code class="filename">contrib/citext</code>'s upgrade script fix collations of
      <code class="type">citext</code> arrays and domains over <code class="type">citext</code>
      (Tom Lane)
     </p><p>
      Release 9.1.2 provided a fix for collations of <code class="type">citext</code> columns
      and indexes in databases upgraded or reloaded from pre-9.1
      installations, but that fix was incomplete: it neglected to handle arrays
      and domains over <code class="type">citext</code>.  This release extends the module's
      upgrade script to handle these cases.  As before, if you have already
      run the upgrade script, you'll need to run the collation update
      commands by hand instead.  See the 9.1.2 release notes for more
      information about doing this.
     </p></li><li class="listitem"><p>
      Allow numeric timezone offsets in <code class="type">timestamp</code> input to be up to
      16 hours away from UTC (Tom Lane)
     </p><p>
      Some historical time zones have offsets larger than 15 hours, the
      previous limit.  This could result in dumped data values being rejected
      during reload.
     </p></li><li class="listitem"><p>
      Fix timestamp conversion to cope when the given time is exactly the
      last DST transition time for the current timezone (Tom Lane)
     </p><p>
      This oversight has been there a long time, but was not noticed
      previously because most DST-using zones are presumed to have an
      indefinite sequence of future DST transitions.
     </p></li><li class="listitem"><p>
      Fix <code class="type">text</code> to <code class="type">name</code> and <code class="type">char</code> to <code class="type">name</code>
      casts to perform string truncation correctly in multibyte encodings
      (Karl Schnaitter)
     </p></li><li class="listitem"><p>
      Fix memory copying bug in <code class="function">to_tsquery()</code> (Heikki Linnakangas)
     </p></li><li class="listitem"><p>
      Ensure <code class="function">txid_current()</code> reports the correct epoch when
      executed in hot standby (Simon Riggs)
     </p></li><li class="listitem"><p>
      Fix planner's handling of outer PlaceHolderVars within subqueries (Tom
      Lane)
     </p><p>
      This bug concerns sub-SELECTs that reference variables coming from the
      nullable side of an outer join of the surrounding query.
      In 9.1, queries affected by this bug would fail with <span class="quote">“<span class="quote">ERROR:
      Upper-level PlaceHolderVar found where not expected</span>”</span>.  But in 9.0 and
      8.4, you'd silently get possibly-wrong answers, since the value
      transmitted into the subquery wouldn't go to null when it should.
     </p></li><li class="listitem"><p>
      Fix planning of <code class="literal">UNION ALL</code> subqueries with output columns
      that are not simple variables (Tom Lane)
     </p><p>
      Planning of such cases got noticeably worse in 9.1 as a result of a
      misguided fix for <span class="quote">“<span class="quote">MergeAppend child's targetlist doesn't match
      MergeAppend</span>”</span> errors.  Revert that fix and do it another way.
     </p></li><li class="listitem"><p>
      Fix slow session startup when <code class="structname">pg_attribute</code> is very large
      (Tom Lane)
     </p><p>
      If <code class="structname">pg_attribute</code> exceeds one-fourth of
      <code class="varname">shared_buffers</code>, cache rebuilding code that is sometimes
      needed during session start would trigger the synchronized-scan logic,
      causing it to take many times longer than normal.  The problem was
      particularly acute if many new sessions were starting at once.
     </p></li><li class="listitem"><p>
      Ensure sequential scans check for query cancel reasonably often (Merlin
      Moncure)
     </p><p>
      A scan encountering many consecutive pages that contain no live tuples
      would not respond to interrupts meanwhile.
     </p></li><li class="listitem"><p>
      Ensure the Windows implementation of <code class="function">PGSemaphoreLock()</code>
      clears <code class="varname">ImmediateInterruptOK</code> before returning (Tom Lane)
     </p><p>
      This oversight meant that a query-cancel interrupt received later
      in the same query could be accepted at an unsafe time, with
      unpredictable but not good consequences.
     </p></li><li class="listitem"><p>
      Show whole-row variables safely when printing views or rules
      (Abbas Butt, Tom Lane)
     </p><p>
      Corner cases involving ambiguous names (that is, the name could be
      either a table or column name of the query) were printed in an
      ambiguous way, risking that the view or rule would be interpreted
      differently after dump and reload.  Avoid the ambiguous case by
      attaching a no-op cast.
     </p></li><li class="listitem"><p>
      Fix <code class="command">COPY FROM</code> to properly handle null marker strings that
      correspond to invalid encoding (Tom Lane)
     </p><p>
      A null marker string such as <code class="literal">E'\\0'</code> should work, and did
      work in the past, but the case got broken in 8.4.
     </p></li><li class="listitem"><p>
      Fix <code class="command">EXPLAIN VERBOSE</code> for writable CTEs containing
      <code class="literal">RETURNING</code> clauses (Tom Lane)
     </p></li><li class="listitem"><p>
      Fix <code class="command">PREPARE TRANSACTION</code> to work correctly in the presence
      of advisory locks (Tom Lane)
     </p><p>
      Historically, <code class="command">PREPARE TRANSACTION</code> has simply ignored any
      session-level advisory locks the session holds, but this case was
      accidentally broken in 9.1.
     </p></li><li class="listitem"><p>
      Fix truncation of unlogged tables (Robert Haas)
     </p></li><li class="listitem"><p>
      Ignore missing schemas during non-interactive assignments of
      <code class="varname">search_path</code> (Tom Lane)
     </p><p>
      This re-aligns 9.1's behavior with that of older branches.  Previously
      9.1 would throw an error for nonexistent schemas mentioned in
      <code class="varname">search_path</code> settings obtained from places such as
      <code class="command">ALTER DATABASE SET</code>.
     </p></li><li class="listitem"><p>
      Fix bugs with temporary or transient tables used in extension scripts
      (Tom Lane)
     </p><p>
      This includes cases such as a rewriting <code class="command">ALTER TABLE</code> within
      an extension update script, since that uses a transient table behind
      the scenes.
     </p></li><li class="listitem"><p>
      Ensure autovacuum worker processes perform stack depth checking
      properly (Heikki Linnakangas)
     </p><p>
      Previously, infinite recursion in a function invoked by
      auto-<code class="command">ANALYZE</code> could crash worker processes.
     </p></li><li class="listitem"><p>
      Fix logging collector to not lose log coherency under high load (Andrew
      Dunstan)
     </p><p>
      The collector previously could fail to reassemble large messages if it
      got too busy.
     </p></li><li class="listitem"><p>
      Fix logging collector to ensure it will restart file rotation
      after receiving <span class="systemitem">SIGHUP</span> (Tom Lane)
     </p></li><li class="listitem"><p>
      Fix <span class="quote">“<span class="quote">too many LWLocks taken</span>”</span> failure in GiST indexes (Heikki
      Linnakangas)
     </p></li><li class="listitem"><p>
      Fix WAL replay logic for GIN indexes to not fail if the index was
      subsequently dropped (Tom Lane)
     </p></li><li class="listitem"><p>
      Correctly detect SSI conflicts of prepared transactions after a crash
      (Dan Ports)
     </p></li><li class="listitem"><p>
      Avoid synchronous replication delay when committing a transaction that
      only modified temporary tables (Heikki Linnakangas)
     </p><p>
      In such a case the transaction's commit record need not be flushed to
      standby servers, but some of the code didn't know that and waited for
      it to happen anyway.
     </p></li><li class="listitem"><p>
      Fix error handling in <span class="application">pg_basebackup</span>
      (Thomas Ogrisegg, Fujii Masao)
     </p></li><li class="listitem"><p>
      Fix <span class="application">walsender</span> to not go into a busy loop if connection
      is terminated (Fujii Masao)
     </p></li><li class="listitem"><p>
      Fix memory leak in PL/pgSQL's <code class="command">RETURN NEXT</code> command (Joe
      Conway)
     </p></li><li class="listitem"><p>
      Fix PL/pgSQL's <code class="command">GET DIAGNOSTICS</code> command when the target
      is the function's first variable (Tom Lane)
     </p></li><li class="listitem"><p>
      Ensure that PL/Perl package-qualifies the <code class="varname">_TD</code> variable
      (Alex Hunsaker)
     </p><p>
      This bug caused trigger invocations to fail when they are nested
      within a function invocation that changes the current package.
     </p></li><li class="listitem"><p>
      Fix PL/Python functions returning composite types to accept a string
      for their result value (Jan Urbanski)
     </p><p>
      This case was accidentally broken by the 9.1 additions to allow a
      composite result value to be supplied in other formats, such as
      dictionaries.
     </p></li><li class="listitem"><p>
      Fix potential access off the end of memory in <span class="application">psql</span>'s
      expanded display (<code class="command">\x</code>) mode (Peter Eisentraut)
     </p></li><li class="listitem"><p>
      Fix several performance problems in <span class="application">pg_dump</span> when
      the database contains many objects (Jeff Janes, Tom Lane)
     </p><p>
      <span class="application">pg_dump</span> could get very slow if the database contained
      many schemas, or if many objects are in dependency loops, or if there
      are many owned sequences.
     </p></li><li class="listitem"><p>
      Fix memory and file descriptor leaks in <span class="application">pg_restore</span>
      when reading a directory-format archive (Peter Eisentraut)
     </p></li><li class="listitem"><p>
      Fix <span class="application">pg_upgrade</span> for the case that a database stored in a
      non-default tablespace contains a table in the cluster's default
      tablespace (Bruce Momjian)
     </p></li><li class="listitem"><p>
      In <span class="application">ecpg</span>, fix rare memory leaks and possible overwrite
      of one byte after the <code class="structname">sqlca_t</code> structure (Peter Eisentraut)
     </p></li><li class="listitem"><p>
      Fix <code class="filename">contrib/dblink</code>'s <code class="function">dblink_exec()</code> to not leak
      temporary database connections upon error (Tom Lane)
     </p></li><li class="listitem"><p>
      Fix <code class="filename">contrib/dblink</code> to report the correct connection name in
      error messages (Kyotaro Horiguchi)
     </p></li><li class="listitem"><p>
      Fix <code class="filename">contrib/vacuumlo</code> to use multiple transactions when
      dropping many large objects (Tim Lewis, Robert Haas, Tom Lane)
     </p><p>
      This change avoids exceeding <code class="varname">max_locks_per_transaction</code> when
      many objects need to be dropped.  The behavior can be adjusted with the
      new <code class="literal">-l</code> (limit) option.
     </p></li><li class="listitem"><p>
      Update time zone data files to <span class="application">tzdata</span> release 2012c
      for DST law changes in Antarctica, Armenia, Chile, Cuba, Falkland
      Islands, Gaza, Haiti, Hebron, Morocco, Syria, and Tokelau Islands;
      also historical corrections for Canada.
     </p></li></ul></div></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="release-9-1-5.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="release.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="release-9-1-3.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">E.129. Release 9.1.5 </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> E.131. Release 9.1.3</td></tr></table></div></body></html>