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<appendix id="release">
 <title>Release Notes</title>

  <para>
   The release notes contain the significant changes in each
   <productname>PostgreSQL</productname> release, with major features and migration
   issues listed at the top.  The release notes do not contain changes
   that affect only a few users or changes that are internal and therefore not
   user-visible.  For example, the optimizer is improved in almost every
   release, but the improvements are usually observed by users as simply
   faster queries.
  </para>

  <para>
   A complete list of changes for each release can be obtained by
   viewing the <link linkend="git">Git</link> logs for each release.
   The <ulink
   url="https://www.postgresql.org/list/pgsql-committers/"><literal>pgsql-committers</literal>
   email list</ulink> records all source code changes as well.  There is also
   a <ulink url="https://git.postgresql.org/gitweb/?p=postgresql.git;a=summary">web
   interface</ulink> that shows changes to specific files.
  </para>

  <para>
   The name appearing next to each item represents the major developer for
   that item.  Of course all changes involve community discussion and patch
   review, so each item is truly a community effort.
  </para>

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&release-12;

 <sect1 id="release-prior">
  <title>Prior Releases</title>

  <para>
   Release notes for prior release branches can be found on the
   <ulink url="https://www.postgresql.org/"><productname>PostgreSQL</productname></ulink>
   web site.  At the time of release of version 12,
   these were the supported prior release branches:

   <itemizedlist>
    <listitem>
     <para>
      <productname>PostgreSQL</productname> 11:
      <ulink url="https://www.postgresql.org/docs/11/release.html">
       <literal>https://www.postgresql.org/docs/11/release.html</literal>
      </ulink>
     </para>
    </listitem>

    <listitem>
     <para>
      <productname>PostgreSQL</productname> 10:
      <ulink url="https://www.postgresql.org/docs/10/release.html">
       <literal>https://www.postgresql.org/docs/10/release.html</literal>
      </ulink>
     </para>
    </listitem>

    <listitem>
     <para>
      <productname>PostgreSQL</productname> 9.6:
      <ulink url="https://www.postgresql.org/docs/9.6/release.html">
       <literal>https://www.postgresql.org/docs/9.6/release.html</literal>
      </ulink>
     </para>
    </listitem>

    <listitem>
     <para>
      <productname>PostgreSQL</productname> 9.5:
      <ulink url="https://www.postgresql.org/docs/9.5/release.html">
       <literal>https://www.postgresql.org/docs/9.5/release.html</literal>
      </ulink>
     </para>
    </listitem>

    <listitem>
     <para>
      <productname>PostgreSQL</productname> 9.4:
      <ulink url="https://www.postgresql.org/docs/9.4/release.html">
       <literal>https://www.postgresql.org/docs/9.4/release.html</literal>
      </ulink>
     </para>
    </listitem>
   </itemizedlist>
  </para>

  <para>
   Release notes for older release branches can be found at
   <ulink url="https://www.postgresql.org/docs/manuals/archive/">
    <literal>https://www.postgresql.org/docs/manuals/archive/</literal>
   </ulink>
  </para>
 </sect1>

</appendix>
