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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.22. Release 9.5.15</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-9-6.html" title="E.21. Release 9.6" /><link rel="next" href="release-9-5-14.html" title="E.23. Release 9.5.14" /></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.22. Release 9.5.15</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="release-9-6.html" title="E.21. Release 9.6">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-9-5-14.html" title="E.23. Release 9.5.14">Next</a></td></tr></table><hr></hr></div><div class="sect1" id="RELEASE-9-5-15"><div class="titlepage"><div><div><h2 class="title" style="clear: both">E.22. Release 9.5.15</h2></div></div></div><div class="toc"><dl class="toc"><dt><span class="sect2"><a href="release-9-5-15.html#id-1.11.6.26.4">E.22.1. Migration to Version 9.5.15</a></span></dt><dt><span class="sect2"><a href="release-9-5-15.html#id-1.11.6.26.5">E.22.2. Changes</a></span></dt></dl></div><p><strong>Release date: </strong>2018-11-08</p><p>
   This release contains a variety of fixes from 9.5.14.
   For information about new features in the 9.5 major release, see
   <a class="xref" href="release-9-5.html" title="E.37. Release 9.5">Section E.37</a>.
  </p><div class="sect2" id="id-1.11.6.26.4"><div class="titlepage"><div><div><h3 class="title">E.22.1. Migration to Version 9.5.15</h3></div></div></div><p>
    A dump/restore is not required for those running 9.5.X.
   </p><p>
    However, if you are upgrading from a version earlier than 9.5.13,
    see <a class="xref" href="release-9-5-13.html" title="E.24. Release 9.5.13">Section E.24</a>.
   </p></div><div class="sect2" id="id-1.11.6.26.5"><div class="titlepage"><div><div><h3 class="title">E.22.2. Changes</h3></div></div></div><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p>
      Fix corner-case failures
      in <code class="function">has_<em class="replaceable"><code>foo</code></em>_privilege()</code>
      family of functions (Tom Lane)
     </p><p>
      Return NULL rather than throwing an error when an invalid object OID
      is provided.  Some of these functions got that right already, but not
      all.  <code class="function">has_column_privilege()</code> was additionally
      capable of crashing on some platforms.
     </p></li><li class="listitem"><p>
      Avoid O(N^2) slowdown in regular expression match/split functions on
      long strings (Andrew Gierth)
     </p></li><li class="listitem"><p>
      Fix parsing of standard multi-character operators that are immediately
      followed by a comment or <code class="literal">+</code> or <code class="literal">-</code>
      (Andrew Gierth)
     </p><p>
      This oversight could lead to parse errors, or to incorrect assignment
      of precedence.
     </p></li><li class="listitem"><p>
      Avoid O(N^3) slowdown in lexer for long strings
      of <code class="literal">+</code> or <code class="literal">-</code> characters
      (Andrew Gierth)
     </p></li><li class="listitem"><p>
      Fix mis-execution of SubPlans when the outer query is being scanned
      backwards (Andrew Gierth)
     </p></li><li class="listitem"><p>
      Fix failure of <code class="command">UPDATE/DELETE ... WHERE CURRENT OF ...</code>
      after rewinding the referenced cursor (Tom Lane)
     </p><p>
      A cursor that scans multiple relations (particularly an inheritance
      tree) could produce wrong behavior if rewound to an earlier relation.
     </p></li><li class="listitem"><p>
      Fix <code class="function">EvalPlanQual</code> to handle conditionally-executed
      InitPlans properly (Andrew Gierth, Tom Lane)
     </p><p>
      This resulted in hard-to-reproduce crashes or wrong answers in
      concurrent updates, if they contained code such as an uncorrelated
      sub-<code class="literal">SELECT</code> inside a <code class="literal">CASE</code>
      construct.
     </p></li><li class="listitem"><p>
      Fix character-class checks to not fail on Windows for Unicode
      characters above U+FFFF (Tom Lane, Kenji Uno)
     </p><p>
      This bug affected full-text-search operations, as well
      as <code class="filename">contrib/ltree</code>
      and <code class="filename">contrib/pg_trgm</code>.
     </p></li><li class="listitem"><p>
      Ensure that sequences owned by a foreign table are processed
      by <code class="literal">ALTER OWNER</code> on the table (Peter Eisentraut)
     </p><p>
      The ownership change should propagate to such sequences as well, but
      this was missed for foreign tables.
     </p></li><li class="listitem"><p>
      Ensure that the server will process
      already-received <code class="literal">NOTIFY</code>
      and <code class="literal">SIGTERM</code> interrupts before waiting for client
      input (Jeff Janes, Tom Lane)
     </p></li><li class="listitem"><p>
      Fix over-allocation of space for <code class="function">array_out()</code>'s
      result string (Keiichi Hirobe)
     </p></li><li class="listitem"><p>
      Fix memory leak in repeated SP-GiST index scans (Tom Lane)
     </p><p>
      This is only known to amount to anything significant in cases where
      an exclusion constraint using SP-GiST receives many new index entries
      in a single command.
     </p></li><li class="listitem"><p>
      Ensure that <code class="function">ApplyLogicalMappingFile()</code> closes the
      mapping file when done with it (Tomas Vondra)
     </p><p>
      Previously, the file descriptor was leaked, eventually resulting in
      failures during logical decoding.
     </p></li><li class="listitem"><p>
      Fix logical decoding to handle cases where a mapped catalog table is
      repeatedly rewritten, e.g. by <code class="literal">VACUUM FULL</code>
      (Andres Freund)
     </p></li><li class="listitem"><p>
      Prevent starting the server with <code class="varname">wal_level</code> set
      to too low a value to support an existing replication slot (Andres
      Freund)
     </p></li><li class="listitem"><p>
      Avoid crash if a utility command causes infinite recursion (Tom Lane)
     </p></li><li class="listitem"><p>
      When initializing a hot standby, cope with duplicate XIDs caused by
      two-phase transactions on the master
      (Michael Paquier, Konstantin Knizhnik)
     </p></li><li class="listitem"><p>
      Fix event triggers to handle nested <code class="command">ALTER TABLE</code>
      commands (Michael Paquier, Álvaro Herrera)
     </p></li><li class="listitem"><p>
      Propagate parent process's transaction and statement start timestamps
      to parallel workers (Konstantin Knizhnik)
     </p><p>
      This prevents misbehavior of functions such
      as <code class="function">transaction_timestamp()</code> when executed in a
      worker.
     </p></li><li class="listitem"><p>
      Fix WAL file recycling logic to work correctly on standby servers
      (Michael Paquier)
     </p><p>
      Depending on the setting of <code class="varname">archive_mode</code>, a standby
      might fail to remove some WAL files that could be removed.
     </p></li><li class="listitem"><p>
      Fix handling of commit-timestamp tracking during recovery
      (Masahiko Sawasa, Michael Paquier)
     </p><p>
      If commit timestamp tracking has been turned on or off, recovery might
      fail due to trying to fetch the commit timestamp for a transaction
      that did not record it.
     </p></li><li class="listitem"><p>
      Randomize the <code class="function">random()</code> seed in bootstrap and
      standalone backends, and in <span class="application">initdb</span>
      (Noah Misch)
     </p><p>
      The main practical effect of this change is that it avoids a scenario
      where <span class="application">initdb</span> might mistakenly conclude that
      POSIX shared memory is not available, due to name collisions caused by
      always using the same random seed.
     </p></li><li class="listitem"><p>
      Allow DSM allocation to be interrupted (Chris Travers)
     </p></li><li class="listitem"><p>
      Properly handle turning <code class="varname">full_page_writes</code> on
      dynamically (Kyotaro Horiguchi)
     </p></li><li class="listitem"><p>
      Avoid possible buffer overrun when replaying GIN page recompression
      from WAL (Alexander Korotkov, Sivasubramanian Ramasubramanian)
     </p></li><li class="listitem"><p>
      Fix missed fsync of a replication slot's directory (Konstantin
      Knizhnik, Michael Paquier)
     </p></li><li class="listitem"><p>
      Fix unexpected timeouts when
      using <code class="varname">wal_sender_timeout</code> on a slow server
      (Noah Misch)
     </p></li><li class="listitem"><p>
      Ensure that hot standby processes use the correct WAL consistency
      point (Alexander Kukushkin, Michael Paquier)
     </p><p>
      This prevents possible misbehavior just after a standby server has
      reached a consistent database state during WAL replay.
     </p></li><li class="listitem"><p>
      Ensure background workers are stopped properly when the postmaster
      receives a fast-shutdown request before completing database startup
      (Alexander Kukushkin)
     </p></li><li class="listitem"><p>
      Don't run atexit callbacks when servicing <code class="literal">SIGQUIT</code>
      (Heikki Linnakangas)
     </p></li><li class="listitem"><p>
      Don't record foreign-server user mappings as members of extensions
      (Tom Lane)
     </p><p>
      If <code class="command">CREATE USER MAPPING</code> is executed in an extension
      script, an extension dependency was created for the user mapping,
      which is unexpected.  Roles can't be extension members, so user
      mappings shouldn't be either.
     </p></li><li class="listitem"><p>
      Make syslogger more robust against failures in opening CSV log files
      (Tom Lane)
     </p></li><li class="listitem"><p>
      Fix <span class="application">psql</span>, as well as documentation
      examples, to call <code class="function">PQconsumeInput()</code> before
      each <code class="function">PQnotifies()</code> call (Tom Lane)
     </p><p>
      This fixes cases in which <span class="application">psql</span> would not
      report receipt of a <code class="literal">NOTIFY</code> message until after the
      next command.
     </p></li><li class="listitem"><p>
      Fix possible inconsistency in <span class="application">pg_dump</span>'s
      sorting of dissimilar object names (Jacob Champion)
     </p></li><li class="listitem"><p>
      Ensure that <span class="application">pg_restore</span> will schema-qualify
      the table name when
      emitting <code class="literal">DISABLE</code>/<code class="literal">ENABLE TRIGGER</code>
      commands (Tom Lane)
     </p><p>
      This avoids failures due to the new policy of running restores with
      restrictive search path.
     </p></li><li class="listitem"><p>
      Fix <span class="application">pg_upgrade</span> to handle event triggers in
      extensions correctly (Haribabu Kommi)
     </p><p>
      <span class="application">pg_upgrade</span> failed to preserve an event
      trigger's extension-membership status.
     </p></li><li class="listitem"><p>
      Fix <span class="application">pg_upgrade</span>'s cluster state check to
      work correctly on a standby server (Bruce Momjian)
     </p></li><li class="listitem"><p>
      Enforce type <code class="type">cube</code>'s dimension limit in
      all <code class="filename">contrib/cube</code> functions (Andrey Borodin)
     </p><p>
      Previously, some cube-related functions could construct values that
      would be rejected by <code class="function">cube_in()</code>, leading to
      dump/reload failures.
     </p></li><li class="listitem"><p>
      Fix <code class="filename">contrib/unaccent</code>'s
      <code class="function">unaccent()</code> function to use
      the <code class="literal">unaccent</code> text search dictionary that is in the
      same schema as the function (Tom Lane)
     </p><p>
      Previously it tried to look up the dictionary using the search path,
      which could fail if the search path has a restrictive value.
     </p></li><li class="listitem"><p>
      Fix build problems on macOS 10.14 (Mojave) (Tom Lane)
     </p><p>
      Adjust <span class="application">configure</span> to add
      an <code class="option">-isysroot</code> switch to <code class="varname">CPPFLAGS</code>;
      without this, PL/Perl and PL/Tcl fail to configure or build on macOS
      10.14.  The specific sysroot used can be overridden at configure time
      or build time by setting the <code class="varname">PG_SYSROOT</code> variable in
      the arguments of <span class="application">configure</span>
      or <span class="application">make</span>.
     </p><p>
      It is now recommended that Perl-related extensions
      write <code class="literal">$(perl_includespec)</code> rather
      than <code class="literal">-I$(perl_archlibexp)/CORE</code> in their compiler
      flags.  The latter continues to work on most platforms, but not recent
      macOS.
     </p><p>
      Also, it should no longer be necessary to
      specify <code class="option">--with-tclconfig</code> manually to get PL/Tcl to
      build on recent macOS releases.
     </p></li><li class="listitem"><p>
      Fix MSVC build and regression-test scripts to work on recent Perl
      versions (Andrew Dunstan)
     </p><p>
      Perl no longer includes the current directory in its search path
      by default; work around that.
     </p></li><li class="listitem"><p>
      On Windows, allow the regression tests to be run by an Administrator
      account (Andrew Dunstan)
     </p><p>
      To do this safely, <span class="application">pg_regress</span> now gives up
      any such privileges at startup.
     </p></li><li class="listitem"><p>
      Support building on Windows with Visual Studio 2015 or Visual Studio 2017
      (Michael Paquier, Haribabu Kommi)
     </p></li><li class="listitem"><p>
      Allow btree comparison functions to return <code class="literal">INT_MIN</code>
      (Tom Lane)
     </p><p>
      Up to now, we've forbidden datatype-specific comparison functions from
      returning <code class="literal">INT_MIN</code>, which allows callers to invert
      the sort order just by negating the comparison result.  However, this
      was never safe for comparison functions that directly return the
      result of <code class="function">memcmp()</code>, <code class="function">strcmp()</code>,
      etc, as POSIX doesn't place any such restriction on those functions.
      At least some recent versions of <code class="function">memcmp()</code> can
      return <code class="literal">INT_MIN</code>, causing incorrect sort ordering.
      Hence, we've removed this restriction.  Callers must now use
      the <code class="literal">INVERT_COMPARE_RESULT()</code> macro if they wish to
      invert the sort order.
     </p></li><li class="listitem"><p>
      Fix recursion hazard in shared-invalidation message processing
      (Tom Lane)
     </p><p>
      This error could, for example, result in failure to access a system
      catalog or index that had just been processed by <code class="command">VACUUM
      FULL</code>.
     </p><p>
      This change adds a new result code
      for <code class="function">LockAcquire</code>, which might possibly affect
      external callers of that function, though only very unusual usage
      patterns would have an issue with it.  The API
      of <code class="function">LockAcquireExtended</code> is also changed.
     </p></li><li class="listitem"><p>
      Save and restore SPI's global variables
      during <code class="function">SPI_connect()</code>
      and <code class="function">SPI_finish()</code> (Chapman Flack, Tom Lane)
     </p><p>
      This prevents possible interference when one SPI-using function calls
      another.
     </p></li><li class="listitem"><p>
      Provide <code class="literal">ALLOCSET_DEFAULT_SIZES</code> and sibling macros
      in back branches (Tom Lane)
     </p><p>
      These macros have existed since 9.6, but there were requests to add
      them to older branches to allow extensions to rely on them without
      branch-specific coding.
     </p></li><li class="listitem"><p>
      Avoid using potentially-under-aligned page buffers (Tom Lane)
     </p><p>
      Invent new union types <code class="type">PGAlignedBlock</code>
      and <code class="type">PGAlignedXLogBlock</code>, and use these in place of plain
      char arrays, ensuring that the compiler can't place the buffer at a
      misaligned start address.  This fixes potential core dumps on
      alignment-picky platforms, and may improve performance even on
      platforms that allow misalignment.
     </p></li><li class="listitem"><p>
      Make <code class="filename">src/port/snprintf.c</code> follow the C99
      standard's definition of <code class="function">snprintf()</code>'s result
      value (Tom Lane)
     </p><p>
      On platforms where this code is used (mostly Windows), its pre-C99
      behavior could lead to failure to detect buffer overrun, if the
      calling code assumed C99 semantics.
     </p></li><li class="listitem"><p>
      When building on i386 with the <span class="application">clang</span>
      compiler, require <code class="option">-msse2</code> to be used (Andres Freund)
     </p><p>
      This avoids problems with missed floating point overflow checks.
     </p></li><li class="listitem"><p>
      Fix <span class="application">configure</span>'s detection of the result
      type of <code class="function">strerror_r()</code> (Tom Lane)
     </p><p>
      The previous coding got the wrong answer when building
      with <span class="application">icc</span> on Linux (and perhaps in other
      cases), leading to <span class="application">libpq</span> not returning
      useful error messages for system-reported errors.
     </p></li><li class="listitem"><p>
      Update time zone data files to <span class="application">tzdata</span>
      release 2018g for DST law changes in Chile, Fiji, Morocco, and Russia
      (Volgograd), plus historical corrections for China, Hawaii, Japan,
      Macau, and North Korea.
     </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-9-6.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-9-5-14.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">E.21. Release 9.6 </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> E.23. Release 9.5.14</td></tr></table></div></body></html>