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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.174. Release 8.4.7</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-8-4-8.html" title="E.173. Release 8.4.8" /><link rel="next" href="release-8-4-6.html" title="E.175. Release 8.4.6" /></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.174. Release 8.4.7</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="release-8-4-8.html" title="E.173. Release 8.4.8">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-8-4-6.html" title="E.175. Release 8.4.6">Next</a></td></tr></table><hr></hr></div><div class="sect1" id="RELEASE-8-4-7"><div class="titlepage"><div><div><h2 class="title" style="clear: both">E.174. Release 8.4.7</h2></div></div></div><div class="toc"><dl class="toc"><dt><span class="sect2"><a href="release-8-4-7.html#id-1.11.6.178.4">E.174.1. Migration to Version 8.4.7</a></span></dt><dt><span class="sect2"><a href="release-8-4-7.html#id-1.11.6.178.5">E.174.2. Changes</a></span></dt></dl></div><p><strong>Release date: </strong>2011-01-31</p><p>
   This release contains a variety of fixes from 8.4.6.
   For information about new features in the 8.4 major release, see
   <a class="xref" href="release-8-4.html" title="E.181. Release 8.4">Section E.181</a>.
  </p><div class="sect2" id="id-1.11.6.178.4"><div class="titlepage"><div><div><h3 class="title">E.174.1. Migration to Version 8.4.7</h3></div></div></div><p>
    A dump/restore is not required for those running 8.4.X.
    However, if you are upgrading from a version earlier than 8.4.2,
    see <a class="xref" href="release-8-4-2.html" title="E.179. Release 8.4.2">Section E.179</a>.
   </p></div><div class="sect2" id="id-1.11.6.178.5"><div class="titlepage"><div><div><h3 class="title">E.174.2. Changes</h3></div></div></div><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p>
      Avoid failures when <code class="command">EXPLAIN</code> tries to display a simple-form
      <code class="literal">CASE</code> expression (Tom Lane)
     </p><p>
      If the <code class="literal">CASE</code>'s test expression was a constant, the planner
      could simplify the <code class="literal">CASE</code> into a form that confused the
      expression-display code, resulting in <span class="quote">“<span class="quote">unexpected CASE WHEN
      clause</span>”</span> errors.
     </p></li><li class="listitem"><p>
      Fix assignment to an array slice that is before the existing range
      of subscripts (Tom Lane)
     </p><p>
      If there was a gap between the newly added subscripts and the first
      pre-existing subscript, the code miscalculated how many entries needed
      to be copied from the old array's null bitmap, potentially leading to
      data corruption or crash.
     </p></li><li class="listitem"><p>
      Avoid unexpected conversion overflow in planner for very distant date
      values (Tom Lane)
     </p><p>
      The <code class="type">date</code> type supports a wider range of dates than can be
      represented by the <code class="type">timestamp</code> types, but the planner assumed it
      could always convert a date to timestamp with impunity.
     </p></li><li class="listitem"><p>
      Fix <span class="application">pg_restore</span>'s text output for large objects (BLOBs)
      when <code class="varname">standard_conforming_strings</code> is on (Tom Lane)
     </p><p>
      Although restoring directly to a database worked correctly, string
      escaping was incorrect if <span class="application">pg_restore</span> was asked for
      SQL text output and <code class="varname">standard_conforming_strings</code> had been
      enabled in the source database.
     </p></li><li class="listitem"><p>
      Fix erroneous parsing of <code class="type">tsquery</code> values containing
      <code class="literal">... &amp; !(subexpression) | ...</code> (Tom Lane)
     </p><p>
      Queries containing this combination of operators were not executed
      correctly.  The same error existed in <code class="filename">contrib/intarray</code>'s
      <code class="type">query_int</code> type and <code class="filename">contrib/ltree</code>'s
      <code class="type">ltxtquery</code> type.
     </p></li><li class="listitem"><p>
      Fix buffer overrun in <code class="filename">contrib/intarray</code>'s input function
      for the <code class="type">query_int</code> type (Apple)
     </p><p>
      This bug is a security risk since the function's return address could
      be overwritten.  Thanks to Apple Inc's security team for reporting this
      issue and supplying the fix.  (CVE-2010-4015)
     </p></li><li class="listitem"><p>
      Fix bug in <code class="filename">contrib/seg</code>'s GiST picksplit algorithm
      (Alexander Korotkov)
     </p><p>
      This could result in considerable inefficiency, though not actually
      incorrect answers, in a GiST index on a <code class="type">seg</code> column.
      If you have such an index, consider <code class="command">REINDEX</code>ing it after
      installing this update.  (This is identical to the bug that was fixed in
      <code class="filename">contrib/cube</code> in the previous update.)
     </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-8-4-8.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-8-4-6.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">E.173. Release 8.4.8 </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> E.175. Release 8.4.6</td></tr></table></div></body></html>