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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.164. Release 8.4.17</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-8-4-18.html" title="E.163. Release 8.4.18" /><link rel="next" href="release-8-4-16.html" title="E.165. Release 8.4.16" /></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.164. Release 8.4.17</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="release-8-4-18.html" title="E.163. Release 8.4.18">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-8-4-16.html" title="E.165. Release 8.4.16">Next</a></td></tr></table><hr></hr></div><div class="sect1" id="RELEASE-8-4-17"><div class="titlepage"><div><div><h2 class="title" style="clear: both">E.164. Release 8.4.17</h2></div></div></div><div class="toc"><dl class="toc"><dt><span class="sect2"><a href="release-8-4-17.html#id-1.11.6.168.4">E.164.1. Migration to Version 8.4.17</a></span></dt><dt><span class="sect2"><a href="release-8-4-17.html#id-1.11.6.168.5">E.164.2. Changes</a></span></dt></dl></div><p><strong>Release date: </strong>2013-04-04</p><p>
   This release contains a variety of fixes from 8.4.16.
   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-1.11.6.168.4"><div class="titlepage"><div><div><h3 class="title">E.164.1. Migration to Version 8.4.17</h3></div></div></div><p>
    A dump/restore is not required for those running 8.4.X.
   </p><p>
    However, this release corrects several errors in management of GiST
    indexes.  After installing this update, it is advisable to
    <code class="command">REINDEX</code> any GiST indexes that meet one or more of the
    conditions described below.
   </p><p>
    Also, if you are upgrading from a version earlier than 8.4.10,
    see <a class="xref" href="release-8-4-10.html" title="E.171. Release 8.4.10">Section E.171</a>.
   </p></div><div class="sect2" id="id-1.11.6.168.5"><div class="titlepage"><div><div><h3 class="title">E.164.2. Changes</h3></div></div></div><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p>
      Reset OpenSSL randomness state in each postmaster child process
      (Marko Kreen)
     </p><p>
      This avoids a scenario wherein random numbers generated by
      <code class="filename">contrib/pgcrypto</code> functions might be relatively easy for
      another database user to guess.  The risk is only significant when
      the postmaster is configured with <code class="varname">ssl</code> = <code class="literal">on</code>
      but most connections don't use SSL encryption.  (CVE-2013-1900)
     </p></li><li class="listitem"><p>
      Fix GiST indexes to not use <span class="quote">“<span class="quote">fuzzy</span>”</span> geometric comparisons when
      it's not appropriate to do so (Alexander Korotkov)
     </p><p>
      The core geometric types perform comparisons using <span class="quote">“<span class="quote">fuzzy</span>”</span>
      equality, but <code class="function">gist_box_same</code> must do exact comparisons,
      else GiST indexes using it might become inconsistent.  After installing
      this update, users should <code class="command">REINDEX</code> any GiST indexes on
      <code class="type">box</code>, <code class="type">polygon</code>, <code class="type">circle</code>, or <code class="type">point</code>
      columns, since all of these use <code class="function">gist_box_same</code>.
     </p></li><li class="listitem"><p>
      Fix erroneous range-union and penalty logic in GiST indexes that use
      <code class="filename">contrib/btree_gist</code> for variable-width data types, that is
      <code class="type">text</code>, <code class="type">bytea</code>, <code class="type">bit</code>, and <code class="type">numeric</code>
      columns (Tom Lane)
     </p><p>
      These errors could result in inconsistent indexes in which some keys
      that are present would not be found by searches, and also in useless
      index bloat.  Users are advised to <code class="command">REINDEX</code> such indexes
      after installing this update.
     </p></li><li class="listitem"><p>
      Fix bugs in GiST page splitting code for multi-column indexes
      (Tom Lane)
     </p><p>
      These errors could result in inconsistent indexes in which some keys
      that are present would not be found by searches, and also in indexes
      that are unnecessarily inefficient to search.  Users are advised to
      <code class="command">REINDEX</code> multi-column GiST indexes after installing this
      update.
     </p></li><li class="listitem"><p>
      Fix infinite-loop risk in regular expression compilation (Tom Lane,
      Don Porter)
     </p></li><li class="listitem"><p>
      Fix potential null-pointer dereference in regular expression compilation
      (Tom Lane)
     </p></li><li class="listitem"><p>
      Fix <code class="function">to_char()</code> to use ASCII-only case-folding rules where
      appropriate (Tom Lane)
     </p><p>
      This fixes misbehavior of some template patterns that should be
      locale-independent, but mishandled <span class="quote">“<span class="quote"><code class="literal">I</code></span>”</span> and
      <span class="quote">“<span class="quote"><code class="literal">i</code></span>”</span> in Turkish locales.
     </p></li><li class="listitem"><p>
      Fix unwanted rejection of timestamp <code class="literal">1999-12-31 24:00:00</code>
      (Tom Lane)
     </p></li><li class="listitem"><p>
      Remove useless <span class="quote">“<span class="quote">picksplit doesn't support secondary split</span>”</span> log
      messages (Josh Hansen, Tom Lane)
     </p><p>
      This message seems to have been added in expectation of code that was
      never written, and probably never will be, since GiST's default
      handling of secondary splits is actually pretty good.  So stop nagging
      end users about it.
     </p></li><li class="listitem"><p>
      Fix possible failure to send a session's last few transaction
      commit/abort counts to the statistics collector (Tom Lane)
     </p></li><li class="listitem"><p>
      Eliminate memory leaks in PL/Perl's <code class="function">spi_prepare()</code> function
      (Alex Hunsaker, Tom Lane)
     </p></li><li class="listitem"><p>
      Fix <span class="application">pg_dumpall</span> to handle database names containing
      <span class="quote">“<span class="quote"><code class="literal">=</code></span>”</span> correctly (Heikki Linnakangas)
     </p></li><li class="listitem"><p>
      Avoid crash in <span class="application">pg_dump</span> when an incorrect connection
      string is given (Heikki Linnakangas)
     </p></li><li class="listitem"><p>
      Ignore invalid indexes in <span class="application">pg_dump</span> (Michael Paquier)
     </p><p>
      Dumping invalid indexes can cause problems at restore time, for example
      if the reason the index creation failed was because it tried to enforce
      a uniqueness condition not satisfied by the table's data.  Also, if the
      index creation is in fact still in progress, it seems reasonable to
      consider it to be an uncommitted DDL change, which
      <span class="application">pg_dump</span> wouldn't be expected to dump anyway.
     </p></li><li class="listitem"><p>
      Fix <code class="filename">contrib/pg_trgm</code>'s <code class="function">similarity()</code> function
      to return zero for trigram-less strings (Tom Lane)
     </p><p>
      Previously it returned <code class="literal">NaN</code> due to internal division by zero.
     </p></li><li class="listitem"><p>
      Update time zone data files to <span class="application">tzdata</span> release 2013b
      for DST law changes in Chile, Haiti, Morocco, Paraguay, and some
      Russian areas.  Also, historical zone data corrections for numerous
      places.
     </p><p>
      Also, update the time zone abbreviation files for recent changes in
      Russia and elsewhere: <code class="literal">CHOT</code>, <code class="literal">GET</code>,
      <code class="literal">IRKT</code>, <code class="literal">KGT</code>, <code class="literal">KRAT</code>, <code class="literal">MAGT</code>,
      <code class="literal">MAWT</code>, <code class="literal">MSK</code>, <code class="literal">NOVT</code>, <code class="literal">OMST</code>,
      <code class="literal">TKT</code>, <code class="literal">VLAT</code>, <code class="literal">WST</code>, <code class="literal">YAKT</code>,
      <code class="literal">YEKT</code> now follow their current meanings, and
      <code class="literal">VOLT</code> (Europe/Volgograd) and <code class="literal">MIST</code>
      (Antarctica/Macquarie) are added to the default abbreviations list.
     </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-8-4-18.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-8-4-16.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">E.163. Release 8.4.18 </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> E.165. Release 8.4.16</td></tr></table></div></body></html>