2831 lines
72 KiB
Plaintext
2831 lines
72 KiB
Plaintext
<!-- doc/src/sgml/release-9.1.sgml -->
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<!-- See header comment in release.sgml about typical markup -->
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<sect1 id="release-9-1">
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<title>Release 9.1</title>
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<note>
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<title>Release Date</title>
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<simpara>2011-??-??</simpara>
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</note>
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<para>CURRENT AS OF 2011-07-07</para>
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<sect2>
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<title>Overview</title>
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<para>
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This release of
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<productname>PostgreSQL</> adds numerous major features, including:
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</para>
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<para>
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(summary to be added)
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</para>
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<para>
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The above items are explained in more detail in the sections below.
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</para>
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</sect2>
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<sect2>
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<title>Migration to Version 9.1</title>
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<para>
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A dump/restore using <application>pg_dump</application>,
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or use of <application>pg_upgrade</application>, is required
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for those wishing to migrate data from any previous
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release.
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</para>
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<para>
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Version 9.1 contains a number of changes that may affect compatibility
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with previous releases. Observe the following incompatibilities:
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</para>
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<sect3>
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<title>Strings</title>
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<itemizedlist>
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<listitem>
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<para>
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Change the default value of <link
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linkend="guc-standard-conforming-strings"><varname>standard_conforming_strings</></link>
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to on (Robert Haas)
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</para>
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<para>
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By default, backslashes are now ordinary characters in string literals,
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not escape characters. This change removes a long-standing
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incompatibility with the SQL standard. <link
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linkend="guc-escape-string-warning"><varname>escape_string_warning</></link>
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has produced warnings about this usage for years. <literal>E''</>
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strings are the proper way to embed backslash escapes in strings and are
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unaffected by this change.
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</para>
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</listitem>
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</itemizedlist>
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</sect3>
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<sect3>
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<title>Casting</title>
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<itemizedlist>
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<listitem>
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<para>
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Disallow function-style and attribute-style data type casts for
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composite types (Tom Lane)
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</para>
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<para>
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For example, disallow
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<literal><replaceable>composite_value</>.text</literal> and
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<literal>text(<replaceable>composite_value</>)</literal>.
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Unintentional uses of this syntax have frequently resulted in bug
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reports; although it was not a bug, it seems better to go back to
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rejecting such expressions.
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The <literal>CAST</> and <literal>::</> syntaxes are still available
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for use when a cast of an entire composite value is actually intended.
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</para>
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</listitem>
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<listitem>
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<para>
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Tighten casting checks for domains based on arrays (Tom Lane)
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</para>
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<para>
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When a domain is based on an array type, it is allowed to <quote>look
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through</> the domain type to access the array elements, including
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subscripting the domain value to fetch or assign an element.
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Assignment to an element of such a domain value, for instance via
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<literal>UPDATE ... SET domaincol[5] = ...</>, will now result in
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rechecking the domain type's constraints, whereas before the checks
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were skipped.
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</para>
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</listitem>
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</itemizedlist>
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</sect3>
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<sect3>
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<title>Arrays</title>
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<itemizedlist>
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<listitem>
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<para>
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Change <link
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linkend="array-functions-table"><function>string_to_array()</></link>
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to return an empty array for a zero-length string (Pavel
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Stehule)
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</para>
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<para>
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Previously this returned a null value.
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</para>
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</listitem>
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<listitem>
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<para>
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Change <link
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linkend="array-functions-table"><function>string_to_array()</></link>
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so a <literal>NULL</> separator splits the string into characters
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(Pavel Stehule)
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</para>
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<para>
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Previously this returned a null value.
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</para>
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</listitem>
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</itemizedlist>
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</sect3>
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<sect3>
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<title>Object Modification</title>
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<itemizedlist>
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<listitem>
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<para>
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Fix improper checks for before/after triggers (Tom Lane)
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</para>
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<para>
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Triggers can now be fired in three cases: <literal>BEFORE</>,
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<literal>AFTER</>, or <literal>INSTEAD OF</> some action.
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Trigger function authors should verify that their logic behaves
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sanely in all three cases.
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</para>
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</listitem>
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<listitem>
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<para>
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Require superuser or <literal>CREATEROLE</> permissions in order to
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set role comments (Tom Lane)
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</para>
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</listitem>
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</itemizedlist>
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</sect3>
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<sect3>
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<title>Server Settings</title>
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<itemizedlist>
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<listitem>
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<para>
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Change <link
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linkend="functions-recovery-info-table"><function>pg_last_xlog_receive_location()</></link>
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so it never moves backwards (Fujii Masao)
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</para>
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<para>
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Previously <function>pg_last_xlog_receive_location()</> could
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move backward when streaming replication is restarted.
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</para>
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</listitem>
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<listitem>
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<para>
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Have logging of replication connections honor <link
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linkend="guc-log-connections"><varname>log_connections</></link>
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(Magnus Hagander)
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</para>
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<para>
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Previously replication connections were always logged.
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</para>
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</listitem>
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</itemizedlist>
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</sect3>
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<sect3>
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<title><link linkend="plpgsql">PL/pgSQL</link> Server-Side Language</title>
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<itemizedlist>
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<listitem>
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<para>
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Change PL/pgSQL's <literal>RAISE</> command without parameters
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to be catchable by the attached exception block (Piyush Newe)
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</para>
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<para>
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Previously <literal>RAISE</> in a code block was always scoped to
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an attached exception block, so it was uncatchable at the same
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scope.
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</para>
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</listitem>
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<listitem>
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<para>
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Adjust PL/pgSQL's error line numbering code to be consistent
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with other PLs (Pavel Stehule)
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</para>
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<para>
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Previously, PL/pgSQL would ignore (not count) an empty line at the
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start of the function body. Since this was inconsistent with all
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other languages, the special case was removed.
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</para>
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</listitem>
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<listitem>
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<para>
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Make PL/pgSQL complain about conflicting IN and OUT parameter names
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(Tom Lane)
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</para>
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<para>
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Formerly, the collision was not detected, and the name would just
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silently refer to only the OUT parameter.
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</para>
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</listitem>
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<listitem>
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<para>
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Type modifiers of PL/pgSQL variables are now visible to the SQL parser
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(Tom Lane)
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</para>
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<para>
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A type modifier (such as a varchar length limit) attached to a PL/pgSQL
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variable was formerly enforced during assignments, but was ignored for
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all other purposes. Such variables will now behave more like table
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columns declared with the same modifier. This is not expected to make
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any visible difference in most cases, but it could result in subtle
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changes for some SQL commands issued by PL/pgSQL functions.
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</para>
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</listitem>
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</itemizedlist>
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</sect3>
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<sect3>
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<title>Other Incompatibilities</title>
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<itemizedlist>
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<listitem>
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<para>
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Make <link
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linkend="monitoring-stats-funcs-table"><function>pg_stat_reset()</></link>
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reset all database-level statistics (Tomas Vondra)
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</para>
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<para>
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Some <structname>pg_stat_database</> counters were not being reset.
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</para>
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</listitem>
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<listitem>
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<para>
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Fix some <link
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linkend="infoschema-triggers"><structname>information_schema.triggers</></link>
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column names to match the new SQL-standard names (Dean Rasheed)
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</para>
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</listitem>
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<listitem>
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<para>
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Treat <application>ECPG</> cursor names as case-insensitive (Zoltan Boszormenyi)
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</para>
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</listitem>
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</itemizedlist>
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</sect3>
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</sect2>
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<sect2>
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<title>Changes</title>
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<para>
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Version 9.1 has ...
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</para>
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<sect3>
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<title>Server</title>
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<sect4>
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<title>Performance</title>
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<itemizedlist>
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<listitem>
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<para>
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Support unlogged tables using the <link
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linkend="SQL-CREATETABLE-description"><literal>UNLOGGED</></link>
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option in <link linkend="SQL-CREATETABLE"><command>CREATE
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TABLE</></link> (Robert Haas)
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</para>
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<para>
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Such tables provide better update performance than regular tables,
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but are not crash-safe: their contents are automatically cleared in
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case of a server crash. Their contents do not propagate to
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replication slaves, either.
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</para>
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</listitem>
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<listitem>
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<para>
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Allow <literal>FULL OUTER JOIN</literal> to be implemented as a
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hash join, and allow either side of a <literal>LEFT OUTER JOIN</>
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or <literal>RIGHT OUTER JOIN</> to be hashed (Tom Lane)
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</para>
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<para>
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Previously <literal>FULL OUTER JOIN</literal> could only be
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implemented as a merge join, and <literal>LEFT OUTER JOIN</literal>
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and <literal>RIGHT OUTER JOIN</literal> could hash only the nullable
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side of the join. These changes provide additional query optimization
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possibilities.
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</para>
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</listitem>
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<listitem>
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<para>
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Merge duplicate fsync requests on busy systems (Robert Haas,
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Greg Smith)
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</para>
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</listitem>
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<listitem>
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<para>
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Improve performance of <link
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linkend="guc-commit-siblings"><varname>commit_siblings</></link>
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(Greg Smith)
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</para>
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<para>
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This allows the use of <varname>commit_siblings</varname> with
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less overhead.
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</para>
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</listitem>
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<listitem>
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<para>
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Reduce the memory requirement for large ispell dictionaries
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(Pavel Stehule, Tom Lane)
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</para>
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</listitem>
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<listitem>
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<para>
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Avoid leaving data files open after <quote>blind writes</>
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(Alvaro Herrera)
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</para>
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<para>
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This fixes scenarios where backends might hold open files that
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were long since deleted, preventing the kernel from reclaiming
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disk space.
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</para>
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</listitem>
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</itemizedlist>
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</sect4>
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<sect4>
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<title>Optimizer</title>
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<itemizedlist>
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<listitem>
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<para>
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Allow inheritance table scans to return meaningfully-sorted
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results (Greg Stark, Hans-Jurgen Schonig, Robert Haas, Tom Lane)
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</para>
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<para>
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This allows better optimization of queries that use <literal>ORDER
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BY</>, <literal>LIMIT</>, or <literal>MIN</>/<literal>MAX</> with
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inherited tables.
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</para>
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</listitem>
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<listitem>
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<para>
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Improve GIN index scan cost estimation (Teodor Sigaev)
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</para>
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</listitem>
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<listitem>
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<para>
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Improve cost estimation for aggregates and window functions (Tom Lane)
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</para>
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</listitem>
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</itemizedlist>
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</sect4>
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<sect4>
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<title>Authentication</title>
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<itemizedlist>
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<listitem>
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<para>
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Support host names and host suffixes
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(e.g. <literal>.example.com</>) in <link
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linkend="auth-pg-hba-conf"><filename>pg_hba.conf</></link>
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(Peter Eisentraut)
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</para>
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<para>
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Previously only host <acronym>IP</> addresses and <acronym>CIDR</>
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values were supported.
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</para>
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</listitem>
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<listitem>
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<para>
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Support the key word <literal>all</> in the host column of <link
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linkend="auth-pg-hba-conf"><filename>pg_hba.conf</></link>
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(Peter Eisentraut)
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</para>
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<para>
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Previously people used <literal>0.0.0.0/0</> or <literal>::/0</>
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for this.
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</para>
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</listitem>
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<listitem>
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<para>
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Reject <literal>local</> lines in <link
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linkend="auth-pg-hba-conf"><filename>pg_hba.conf</></link>
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on platforms that don't support Unix-socket connections
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(Magnus Hagander)
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</para>
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<para>
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Formerly, such lines were silently ignored, which could be surprising.
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This makes the behavior more like other unsupported cases.
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</para>
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</listitem>
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<listitem>
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<para>
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Allow <link linkend="gssapi-auth"><acronym>GSSAPI</></link>
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to be used to authenticate to servers via <link
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linkend="sspi-auth"><acronym>SSPI</></link> (Christian Ullrich)
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</para>
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<para>
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Specifically this allows Unix-based <acronym>GSSAPI</> clients
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to do <acronym>SSPI</> authentication with Windows servers.
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</para>
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</listitem>
|
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|
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<listitem>
|
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<para>
|
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<link linkend="auth-ident"><literal>ident</literal></link>
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authentication over local sockets is now known as
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<link linkend="auth-peer"><literal>peer</literal></link>
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(Magnus Hagander)
|
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</para>
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|
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<para>
|
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The old term is still accepted for backward compatibility.
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</para>
|
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</listitem>
|
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|
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<listitem>
|
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<para>
|
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Rewrite <link linkend="auth-peer"><acronym>peer</></link>
|
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authentication to avoid use of credential control messages (Tom Lane)
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</para>
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|
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<para>
|
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This change makes the peer authentication code simpler and
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better-performing. However, it requires the platform to provide the
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<function>getpeereid</> function or an equivalent socket operation.
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So far as is known, the only platform for which peer authentication
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worked before and now will not is pre-5.0 NetBSD.
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</para>
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</listitem>
|
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|
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</itemizedlist>
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|
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</sect4>
|
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|
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<sect4>
|
|
<title>Monitoring</title>
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|
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<itemizedlist>
|
|
|
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<listitem>
|
|
<para>
|
|
Add details to the logging of restartpoints and checkpoints,
|
|
which is controlled by <link
|
|
linkend="guc-log-checkpoints"><varname>log_checkpoints</></link>
|
|
(Fujii Masao, Greg Smith)
|
|
</para>
|
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|
|
<para>
|
|
New details show <acronym>WAL</> file and sync activity.
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|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add <link
|
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linkend="guc-log-file-mode"><varname>log_file_mode</></link>
|
|
which controls the permissions on log files created by the
|
|
logging collector (Martin Pihlak)
|
|
</para>
|
|
</listitem>
|
|
|
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</itemizedlist>
|
|
|
|
</sect4>
|
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|
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<sect4>
|
|
<title>Statistical Views</title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add <structfield>client_hostname</structfield> column to <link
|
|
linkend="monitoring-stats-views-table"><structname>pg_stat_activity</></link>
|
|
(Peter Eisentraut)
|
|
</para>
|
|
|
|
<para>
|
|
Previously only the client address was reported.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add <link
|
|
linkend="monitoring-stats-views-table"><structname>pg_stat_xact_*</></link>
|
|
statistics functions and views (Joel Jacobson)
|
|
</para>
|
|
|
|
<para>
|
|
These are like the database-wide statistics counter views, but
|
|
reflect counts for only the current transaction.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add time of last reset in database-level and background writer
|
|
statistics views (Tomas Vondra)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add columns showing the number of vacuum and analyze operations
|
|
in <link
|
|
linkend="monitoring-stats-views-table"><structname>pg_stat_*_tables</></link>
|
|
views (Magnus Hagander)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add <structfield>buffers_backend_fsync</> column to <link
|
|
linkend="monitoring-stats-views-table"><structname>pg_stat_bgwriter</></link>
|
|
(Greg Smith)
|
|
</para>
|
|
|
|
<para>
|
|
This new column counts the number of times a backend fsyncs a
|
|
buffer.
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
</sect4>
|
|
|
|
<sect4>
|
|
<title>Server Settings</title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Allow auto-tuning of <link
|
|
linkend="guc-wal-buffers"><varname>wal_buffers</></link> (Greg
|
|
Smith)
|
|
</para>
|
|
|
|
<para>
|
|
<varname>wal_buffers</> is now auto-tuned by default based on
|
|
the size of <varname>shared_buffers</>.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Increase the maximum values for
|
|
<link linkend="guc-deadlock-timeout"><varname>deadlock_timeout</varname></link>,
|
|
<link linkend="guc-log-min-duration-statement"><varname>log_min_duration_statement</varname></link>, and
|
|
<link linkend="guc-log-autovacuum-min-duration"><varname>log_autovacuum_min_duration</varname></link>
|
|
(Peter Eisentraut)
|
|
</para>
|
|
|
|
<para>
|
|
The maximum value for each of these parameters was previously
|
|
only about 35 minutes. Much larger values are now allowed.
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
</sect4>
|
|
|
|
</sect3>
|
|
|
|
<sect3>
|
|
<title>Replication and Recovery</title>
|
|
|
|
<sect4>
|
|
<title>Streaming Replication and Continuous Archiving</title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Allow <link linkend="synchronous-replication">synchronous
|
|
replication</link> (Simon Riggs, Fujii Masao)
|
|
</para>
|
|
|
|
<para>
|
|
This allows the primary to wait for a standby to write the transaction
|
|
information to disk before acknowledging the commit.
|
|
One standby at a time can take the role of the synchronous standby,
|
|
as controlled by the
|
|
<link linkend="guc-synchronous-standby-names"><varname>synchronous_standby_names</varname></link>
|
|
setting. Synchronous replication can be enabled or disabled on a
|
|
per-transaction basis using the
|
|
<link linkend="guc-synchronous-commit"><varname>synchronous_commit</></link>
|
|
setting.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add protocol support for sending file system backups to standbys using
|
|
the streaming replication network connection (Magnus Hagander,
|
|
Heikki Linnakangas)
|
|
</para>
|
|
|
|
<para>
|
|
This avoids the requirement of manually transferring a file
|
|
system backup when setting up a standby server.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add
|
|
<link linkend="guc-replication-timeout"><varname>replication_timeout</></link>
|
|
setting (Fujii Masao, Heikki Linnakangas)
|
|
</para>
|
|
|
|
<para>
|
|
Replication connections that are idle for more than the
|
|
<varname>replication_timeout</> interval will be terminated
|
|
automatically. Formerly, a failed connection was typically not
|
|
detected until the TCP timeout elapsed, which is inconveniently
|
|
long in many situations.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add command-line tool <link
|
|
linkend="app-pgbasebackup"><application>pg_basebackup</></link>
|
|
for creating a new standby server or database backup (Magnus
|
|
Hagander)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add replication <link linkend="SQL-CREATEROLE">permission</link>
|
|
for roles (Magnus Hagander)
|
|
</para>
|
|
|
|
<para>
|
|
This is a read-only permission used for streaming replication.
|
|
It allows a non-superuser role to be used for replication connections.
|
|
Previously only superusers could initiate replication
|
|
connections; superusers still have this permission by default.
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
</sect4>
|
|
|
|
<sect4>
|
|
<title>Replication Monitoring</title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add system view <link
|
|
linkend="monitoring-stats-views-table"><structname>pg_stat_replication</></link>
|
|
which displays activity of <acronym>WAL</> sender processes (Itagaki
|
|
Takahiro, Simon Riggs)
|
|
</para>
|
|
|
|
<para>
|
|
This reports the status of all connected standby servers.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add monitoring function <link
|
|
linkend="functions-recovery-info-table"><function>pg_last_xact_replay_timestamp()</></link>
|
|
(Fujii Masao)
|
|
</para>
|
|
|
|
<para>
|
|
This returns the time at which the primary generated the most
|
|
recent commit or abort record applied on the standby.
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
</sect4>
|
|
|
|
<sect4>
|
|
<title>Hot Standby</title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add configuration parameter <link
|
|
linkend="guc-hot-standby-feedback"><varname>hot_standby_feedback</></link>
|
|
to enable standbys to postpone cleanup of old row versions on the
|
|
primary (Simon Riggs)
|
|
</para>
|
|
|
|
<para>
|
|
This helps avoid canceling long-running queries on the standby.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add the <link
|
|
linkend="monitoring-stats-views-table"><structname>pg_stat_database_conflicts</></link>
|
|
system view to show queries that have been canceled and the
|
|
reason (Magnus Hagander)
|
|
</para>
|
|
|
|
<para>
|
|
Cancellations can occur because of dropped tablespaces, lock
|
|
timeouts, old snapshots, pinned buffers, and deadlocks.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add a <structfield>conflicts</> count to <link
|
|
linkend="monitoring-stats-views-table"><structname>pg_stat_database</></link>
|
|
(Magnus Hagander)
|
|
</para>
|
|
|
|
<para>
|
|
This is the number of conflicts that occurred in the database.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Increase the maximum values for
|
|
<link linkend="guc-max-standby-archive-delay"><varname>max_standby_archive_delay</varname></link> and
|
|
<link linkend="guc-max-standby-streaming-delay"><varname>max_standby_streaming_delay</varname></link>.
|
|
</para>
|
|
|
|
<para>
|
|
The maximum value for each of these parameters was previously
|
|
only about 35 minutes. Much larger values are now allowed.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add <link
|
|
linkend="errcodes-table"><literal>ERRCODE_T_R_DATABASE_DROPPED</></link>
|
|
error code to report recovery conflicts due to dropped databases
|
|
(Tatsuo Ishii)
|
|
</para>
|
|
|
|
<para>
|
|
This is useful for connection pooling software.
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
</sect4>
|
|
|
|
<sect4>
|
|
<title>Recovery Control</title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add functions to control streaming replication replay (Simon Riggs)
|
|
</para>
|
|
|
|
<para>
|
|
The new functions are <link
|
|
linkend="functions-recovery-control-table"><function>pg_xlog_replay_pause()</></link>,
|
|
<link
|
|
linkend="functions-recovery-control-table"><function>pg_xlog_replay_resume()</></link>,
|
|
and the status function <link
|
|
linkend="functions-recovery-control-table"><function>pg_is_xlog_replay_paused()</></link>.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add <filename>recovery.conf</> setting <link
|
|
linkend="pause-at-recovery-target"><varname>pause_at_recovery_target</></link>
|
|
to pause recovery at target (Simon Riggs)
|
|
</para>
|
|
|
|
<para>
|
|
This allows a recovery server to be queried to check whether
|
|
the recovery point is the one desired.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add the ability to create named restore points using <link
|
|
linkend="functions-admin-backup-table"><function>pg_create_restore_point()</></link>
|
|
(Jaime Casanova)
|
|
</para>
|
|
|
|
<para>
|
|
These named restore points can be specified as recovery
|
|
targets using the new <filename>recovery.conf</> setting
|
|
<link linkend="recovery-target-name"><varname>recovery_target_name</></link>.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Allow standby recovery to switch to a new timeline automatically
|
|
(Heikki Linnakangas)
|
|
</para>
|
|
|
|
<para>
|
|
Now standby servers scan the archive directory for new
|
|
timelines periodically.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add <link
|
|
linkend="guc-restart-after-crash"><varname>restart_after_crash</></link>
|
|
setting which disables automatic server restart after a backend
|
|
crash (Robert Haas)
|
|
</para>
|
|
|
|
<para>
|
|
This allows external cluster management software to take control
|
|
of whether servers restart or not.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Allow <link
|
|
linkend="recovery-config"><filename>recovery.conf</></link>
|
|
to use the same quoting behavior as <filename>postgresql.conf</>
|
|
(Dimitri Fontaine)
|
|
</para>
|
|
|
|
<para>
|
|
Previously all values had to be quoted.
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
</sect4>
|
|
|
|
</sect3>
|
|
|
|
<sect3>
|
|
<title>Queries</title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add a true <link
|
|
linkend="xact-serializable">serializable</link> isolation
|
|
level (Kevin Grittner, Dan Ports)
|
|
</para>
|
|
|
|
<para>
|
|
Previously, asking for serializable isolation guaranteed only that a
|
|
single MVCC snapshot would be used for the entire transaction, which
|
|
allowed certain documented anomalies. The old snapshot isolation
|
|
behavior is still accessible by requesting the <link
|
|
linkend="xact-repeatable-read"><literal>REPEATABLE READ</></link>
|
|
isolation level.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Allow data-modification commands
|
|
(<command>INSERT</>/<command>UPDATE</>/<command>DELETE)</> in
|
|
<link linkend="queries-with"><literal>WITH</></link> clauses
|
|
(Marko Tiikkaja, Hitoshi Harada)
|
|
</para>
|
|
|
|
<para>
|
|
These commands can use <literal>RETURNING</> to pass data up to the
|
|
containing query.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Allow <link linkend="queries-with"><literal>WITH</></link>
|
|
clauses to be attached to <command>INSERT</>, <command>UPDATE</>,
|
|
<command>DELETE</> statements (Marko Tiikkaja, Hitoshi Harada)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Allow non-<link linkend="queries-group"><literal>GROUP
|
|
BY</></link> columns in the query target list when the primary
|
|
key is specified in the <literal>GROUP BY</> clause (Peter
|
|
Eisentraut)
|
|
</para>
|
|
|
|
<para>
|
|
Some other database system already allowed this behavior, and
|
|
because of the primary key, the result is unambiguous.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Allow use of the key word <literal>DISTINCT</> in <link
|
|
linkend="queries-union"><literal>UNION</>/<literal>INTERSECT</>/<literal>EXCEPT</></link>
|
|
clauses (Tom Lane)
|
|
</para>
|
|
|
|
<para>
|
|
<literal>DISTINCT</> is the default behavior so use of this
|
|
key word is redundant, but the SQL standard allows it.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Fix ordinary queries with rules to use the same snapshot behavior
|
|
as <command>EXPLAIN ANALYZE</> (Marko Tiikkaja)
|
|
</para>
|
|
|
|
<para>
|
|
Previously <command>EXPLAIN ANALYZE</> used a slightly different
|
|
snapshot for queries involving rules. The <command>EXPLAIN ANALYZE</>
|
|
behavior was judged to be more logical.
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
<sect4>
|
|
<title>Strings</title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add per-column <link
|
|
linkend="collation">collation</link> support
|
|
(Peter Eisentraut, Tom Lane)
|
|
</para>
|
|
|
|
<para>
|
|
Previously collation could only be set at database creation.
|
|
Collation can now be set per column, domain, index, or
|
|
expression, via the SQL-standard <literal>COLLATE</> clause.
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
</sect4>
|
|
|
|
</sect3>
|
|
|
|
<sect3>
|
|
<title>Object Manipulation</title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add <link linkend="extend-extensions">extensions</link> which
|
|
simplify packaging of additions to <productname>PostgreSQL</>
|
|
(Dimitri Fontaine, Tom Lane)
|
|
</para>
|
|
|
|
<para>
|
|
Extensions are controlled by the new <link
|
|
linkend="SQL-CREATEEXTENSION"><command>CREATE</></link>/<link
|
|
linkend="SQL-ALTEREXTENSION"><command>ALTER</></link>/<link
|
|
linkend="SQL-DROPEXTENSION"><command>DROP EXTENSION</></link>
|
|
commands. This replaces ad-hoc methods of grouping objects that
|
|
are added to a <productname>PostgreSQL</> installation.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add support for <link linkend="SQL-CREATEFOREIGNTABLE">foreign
|
|
tables</link> (Shigeru Hanada, Robert Haas, Jan Urbanski,
|
|
Heikki Linnakangas)
|
|
</para>
|
|
|
|
<para>
|
|
This allows data stored outside the database to be used like
|
|
native <productname>PostgreSQL</>-stored data. Foreign tables
|
|
are currently read-only, however.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Allow new values to be added to an existing enum type via
|
|
<link linkend="SQL-ALTERTYPE"><command>ALTER TYPE</></link> (Andrew
|
|
Dunstan)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add <link linkend="SQL-ALTERTYPE"><command>ALTER TYPE ...
|
|
ADD/DROP/ALTER/RENAME ATTRIBUTE</></link> (Peter Eisentraut)
|
|
</para>
|
|
|
|
<para>
|
|
This allows modification of composite types.
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
<sect4>
|
|
<title><command>ALTER</> Object</title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add <literal>RESTRICT</>/<literal>CASCADE</> to <link
|
|
linkend="SQL-ALTERTYPE"><command>ALTER TYPE</></link> operations
|
|
on typed tables (Peter Eisentraut)
|
|
</para>
|
|
|
|
<para>
|
|
This controls
|
|
<literal>ADD</>/<literal>DROP</>/<literal>ALTER</>/<literal>RENAME
|
|
ATTRIBUTE</> cascading behavior.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Support <literal>ALTER TABLE <replaceable>name</> {OF | NOT OF}
|
|
<replaceable>type</></literal>
|
|
(Noah Misch)
|
|
</para>
|
|
|
|
<para>
|
|
This syntax allows a standalone table to be made into a typed table,
|
|
or a typed table to be made standalone.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add support for more object types in <command>ALTER ... SET
|
|
SCHEMA</> commands (Dimitri Fontaine)
|
|
</para>
|
|
|
|
<para>
|
|
This command is now supported for conversions, operators, operator
|
|
classes, operator families, text search configurations, text search
|
|
dictionaries, text search parsers, and text search templates.
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
</sect4>
|
|
|
|
<sect4>
|
|
<title><link linkend="SQL-CREATETABLE"><command>CREATE/ALTER TABLE</></link></title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add <command>ALTER TABLE ...
|
|
ADD UNIQUE/PRIMARY KEY USING INDEX</command>
|
|
(Gurjeet Singh)
|
|
</para>
|
|
|
|
<para>
|
|
This allows a primary key or unique constraint to be defined using an
|
|
existing unique index, including a concurrently created unique index.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Allow <command>ALTER TABLE</>
|
|
to add foreign keys without validation (Simon Riggs)
|
|
</para>
|
|
|
|
<para>
|
|
The new option is called <literal>NOT VALID</>, which can
|
|
later be modified to <literal>VALIDATED</> and validation
|
|
checks performed. Together these allow you to add a foreign key
|
|
with minimal impact on read and write operations.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Allow <link linkend="SQL-ALTERTABLE"><command>ALTER TABLE
|
|
... SET DATA TYPE</command></link> to avoid table rewrites in
|
|
appropriate cases (Noah Misch, Robert Haas)
|
|
</para>
|
|
|
|
<para>
|
|
For example, converting a <type>varchar</> column to
|
|
<type>text</> no longer requires a rewrite of the table.
|
|
However, increasing the length constraint on a
|
|
<type>varchar</> column still requires a table rewrite.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add <link linkend="SQL-CREATETABLE"><command>CREATE TABLE IF
|
|
NOT EXISTS</></link> syntax (Robert Haas)
|
|
</para>
|
|
|
|
<para>
|
|
This allows table creation without causing an error if the
|
|
table already exists.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Fix possible <quote>tuple concurrently updated</quote> error
|
|
when two backends attempted to add an inheritance
|
|
child to the same table at the same time (Robert Haas)
|
|
</para>
|
|
|
|
<para>
|
|
<link linkend="sql-altertable"><command>ALTER TABLE</command></link>
|
|
now takes a stronger lock on the parent table, so that both children do
|
|
not try to update it simultaneously.
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
</sect4>
|
|
|
|
<sect4>
|
|
<title>Object Permissions</title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add a <link linkend="SQL-SECURITY-LABEL"><command>SECURITY
|
|
LABEL</></link> command (KaiGai Kohei)
|
|
</para>
|
|
|
|
<para>
|
|
This allows security labels to be assigned to objects.
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
</sect4>
|
|
|
|
</sect3>
|
|
|
|
<sect3>
|
|
<title>Utility Operations</title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add transaction-level <link linkend="advisory-locks">advisory
|
|
locks</link> (Marko Tiikkaja)
|
|
</para>
|
|
|
|
<para>
|
|
This is similar to the existing session-level advisory locks,
|
|
but the locks are automatically released at transaction end.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Make <link linkend="SQL-TRUNCATE"><command>TRUNCATE ... RESTART
|
|
IDENTITY</></link> restart sequences transactionally (Steve
|
|
Singer)
|
|
</para>
|
|
|
|
<para>
|
|
Previously the counter could have been left out of sync if a
|
|
backend crashed between the on-commit truncation activity and
|
|
commit completion.
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
<sect4>
|
|
<title><link linkend="SQL-COPY"><command>COPY</></link></title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add <literal>ENCODING</> option to <link
|
|
linkend="SQL-COPY"><command>COPY TO/FROM</></link> (Hitoshi
|
|
Harada, Itagaki Takahiro)
|
|
</para>
|
|
|
|
<para>
|
|
This allows the encoding of the <command>COPY</> file to be
|
|
specified separately from client encoding.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add bidirectional <link linkend="SQL-COPY"><command>COPY</></link>
|
|
protocol support (Fujii Masao)
|
|
</para>
|
|
|
|
<para>
|
|
This is currently only used by streaming replication.
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
</sect4>
|
|
|
|
<sect4>
|
|
<title><link linkend="SQL-EXPLAIN"><command>EXPLAIN</></link></title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Make <command>EXPLAIN VERBOSE</> show the function call expression
|
|
in a <literal>FunctionScan</literal> node (Tom Lane)
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
</sect4>
|
|
|
|
<sect4>
|
|
<title><link linkend="SQL-VACUUM"><command>VACUUM</></link></title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add additional details to the output of <link
|
|
linkend="SQL-VACUUM"><command>VACUUM FULL VERBOSE</></link>
|
|
and <link linkend="SQL-CLUSTER"><command>CLUSTER VERBOSE</></link>
|
|
(Itagaki Takahiro)
|
|
</para>
|
|
|
|
<para>
|
|
New information includes the live and dead tuple count and
|
|
whether <command>CLUSTER</> is using an index to rebuild.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Prevent <link linkend="autovacuum">autovacuum</link> from
|
|
waiting if it cannot acquire a lock (Robert Haas)
|
|
</para>
|
|
|
|
<para>
|
|
It will try to vacuum later.
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
</sect4>
|
|
|
|
<sect4>
|
|
<title><link linkend="SQL-CLUSTER"><command>CLUSTER</></link></title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Allow <command>CLUSTER</> to sort the table rather than scanning
|
|
the index when it seems likely to be cheaper (Leonardo Francalanci)
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
</sect4>
|
|
|
|
<sect4>
|
|
<title>Indexes</title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add nearest-neighbor (order-by-operator) searching to <link
|
|
linkend="GiST"><acronym>GiST</> indexes</link> (Teodor Sigaev, Tom Lane)
|
|
</para>
|
|
|
|
<para>
|
|
This allows <acronym>GiST</> indexes to quickly return the
|
|
<replaceable>N</> closest values in a query with <literal>LIMIT</>.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Allow <link linkend="GIN"><acronym>GIN</> indexes</link> to index null
|
|
and empty values (Tom Lane)
|
|
</para>
|
|
|
|
<para>
|
|
This allows full <acronym>GIN</> index scans, and fixes various
|
|
corner cases in which GIN scans would fail.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Allow <link linkend="GIN"><acronym>GIN</> indexes</link> to
|
|
better recognize duplicate search entries (Tom Lane)
|
|
</para>
|
|
|
|
<para>
|
|
This reduces the cost of index scans, especially in cases where
|
|
it avoids unnecessary full index scans.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Fix <link linkend="GiST"><acronym>GiST</> indexes</link> to be fully
|
|
crash-safe (Heikki Linnakangas)
|
|
</para>
|
|
|
|
<para>
|
|
Previously there were rare cases where a <command>REINDEX</>
|
|
would be required (you would be informed).
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
</sect4>
|
|
|
|
</sect3>
|
|
|
|
<sect3>
|
|
<title>Data Types</title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Allow <type>numeric</> to use a more compact, two-byte header
|
|
in common cases (Robert Haas)
|
|
</para>
|
|
|
|
<para>
|
|
Previously all <type>numeric</> values had four-byte headers;
|
|
this saves on disk storage.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add support for dividing <type>money</> by <type>money</>
|
|
(Andy Balholm)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Allow binary I/O on type <type>void</type> (Radoslaw Smogura)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Improve hypotenuse calculations for geometric operators (Paul Matthews)
|
|
</para>
|
|
|
|
<para>
|
|
This avoids unnecessary overflows, and may also be more accurate.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Support hashing array values (Tom Lane)
|
|
</para>
|
|
|
|
<para>
|
|
This provides additional query optimization possibilities.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Don't treat a composite type as sortable unless all its column types
|
|
are sortable (Tom Lane)
|
|
</para>
|
|
|
|
<para>
|
|
This avoids possible <quote>could not identify a comparison function</>
|
|
failures at runtime, if it is possible to implement the query without
|
|
sorting. Also, <command>ANALYZE</> won't try to use inappropriate
|
|
statistics-gathering methods for columns of such composite types.
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
<sect4>
|
|
<title>Casting</title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add support for casting between <type>money</> and <type>numeric</>
|
|
(Andy Balholm)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add support for casting from <type>int4</> and <type>int8</>
|
|
to <type>numeric</> (Joey Adams)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Allow casting a table's row type to the table's supertype if
|
|
it's a typed table (Peter Eisentraut)
|
|
</para>
|
|
|
|
<para>
|
|
This is analogous to the existing facility that allows casting a row
|
|
type to a supertable's row type.
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
</sect4>
|
|
|
|
<sect4>
|
|
<title><link linkend="functions-xml"><acronym>XML</></link></title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add <acronym>XML</> function <link
|
|
linkend="xml-exists"><literal>XMLEXISTS</></link> and <link
|
|
linkend="xml-exists"><function>xpath_exists()</></link>
|
|
functions (Mike Fowler)
|
|
</para>
|
|
|
|
<para>
|
|
These are used for XPath matching.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add <acronym>XML</> functions <link
|
|
linkend="xml-is-well-formed"><function>xml_is_well_formed()</></link>,
|
|
<link
|
|
linkend="xml-is-well-formed"><function>xml_is_well_formed_document()</></link>,
|
|
<link
|
|
linkend="xml-is-well-formed"><function>xml_is_well_formed_content()</></link>
|
|
(Mike Fowler)
|
|
</para>
|
|
|
|
<para>
|
|
These check whether the input is properly-formed <acronym>XML</>.
|
|
They provide functionality that was previously available only in
|
|
the deprecated <filename>contrib/xml2</filename> module.
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
</sect4>
|
|
|
|
</sect3>
|
|
|
|
<sect3>
|
|
<title>Functions</title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add SQL function <link
|
|
linkend="format"><function>format(text)</></link>, which
|
|
behaves like C's <function>printf()</> (Pavel Stehule, Robert
|
|
Haas)
|
|
</para>
|
|
|
|
<para>
|
|
It currently supports formats for strings, SQL literals, and
|
|
SQL identifiers.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add string functions <link
|
|
linkend="functions-string-other"><function>concat()</></link>,
|
|
<link
|
|
linkend="functions-string-other"><function>concat_ws()</></link>,
|
|
<link linkend="functions-string-other"><function>left()</></link>,
|
|
<link linkend="functions-string-other"><function>right()</></link>,
|
|
and <link
|
|
linkend="functions-string-other"><function>reverse()</></link>
|
|
(Pavel Stehule)
|
|
</para>
|
|
|
|
<para>
|
|
These improve compatibility with other database products.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add function <link
|
|
linkend="functions-admin-genfile"><function>pg_read_binary_file()</></link>
|
|
to read binary files (Dimitri Fontaine, Itagaki Takahiro)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add a single-parameter version of function <link
|
|
linkend="functions-admin-genfile"><function>pg_read_file()</></link>
|
|
to read an entire file (Dimitri Fontaine, Itagaki Takahiro)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add three-parameter forms of <link
|
|
linkend="array-functions-table"><function>array_to_string()</></link>
|
|
and <link
|
|
linkend="array-functions-table"><function>string_to_array()</></link>
|
|
for null value processing control (Pavel Stehule)
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
<sect4>
|
|
<title>Object Information Functions</title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add the <link
|
|
linkend="functions-info-catalog-table"><function>pg_describe_object()</></link>
|
|
function (Alvaro Herrera)
|
|
</para>
|
|
|
|
<para>
|
|
This function is used to obtain a human-readable string describing
|
|
an object, based on the <link
|
|
linkend="catalog-pg-class"><structname>pg_class</structname></link>
|
|
OID, object OID, and sub-object ID. It can be used to help
|
|
interpret the contents of <link
|
|
linkend="catalog-pg-depend"><structname>pg_depend</structname></link>.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Update comments for built-in operators and their underlying
|
|
functions (Tom Lane)
|
|
</para>
|
|
|
|
<para>
|
|
Functions that are meant to be used via an associated operator
|
|
are now commented as such.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add variable <link
|
|
linkend="guc-quote-all-identifiers"><varname>quote_all_identifiers</></link>
|
|
to force the quoting of all identifiers in <command>EXPLAIN</>
|
|
and in system catalog functions like <link
|
|
linkend="functions-info-catalog-table"><function>pg_get_viewdef()</></link>
|
|
(Robert Haas)
|
|
</para>
|
|
|
|
<para>
|
|
This makes exporting schemas to tools and other databases with
|
|
different quoting rules easier.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add columns to the <link
|
|
linkend="infoschema-sequences"><structname>information_schema.sequences</></link>
|
|
system view (Peter Eisentraut)
|
|
</para>
|
|
|
|
<para>
|
|
Previously, though the view existed, the columns about the
|
|
sequence parameters were unimplemented.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Allow <literal>public</> as a pseudo-role name in <link
|
|
linkend="functions-info-access-table"><function>has_table_privilege()</></link>
|
|
and related functions (Alvaro Herrera)
|
|
</para>
|
|
|
|
<para>
|
|
This allows checking for public permissions.
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
</sect4>
|
|
|
|
<sect4>
|
|
<title>Function and Trigger Creation</title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Support <link linkend="SQL-CREATETRIGGER"><literal>INSTEAD
|
|
OF</></link> triggers on views (Dean Rasheed)
|
|
</para>
|
|
|
|
<para>
|
|
This feature can be used to implement fully updatable views.
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
</sect4>
|
|
|
|
</sect3>
|
|
|
|
<sect3>
|
|
<title>Server-Side Languages</title>
|
|
|
|
<sect4>
|
|
<title><link linkend="plpgsql">PL/pgSQL</link> Server-Side Language</title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add <link linkend="plpgsql-foreach-array"><command>FOREACH IN
|
|
ARRAY</></link> to <link linkend="plpgsql">PL/pgSQL</link>
|
|
(Pavel Stehule)
|
|
</para>
|
|
|
|
<para>
|
|
This is more efficient and readable than previous methods of
|
|
iterating through the elements of an array value.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Allow <command>RAISE</command> without parameters to be caught in
|
|
the same places that could catch a <command>RAISE ERROR</command>
|
|
from the same location (Piyush Newe)
|
|
</para>
|
|
|
|
<para>
|
|
The previous coding threw the error
|
|
from the block containing the active exception handler.
|
|
The new behavior is more consistent with other DBMS products.
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
</sect4>
|
|
|
|
<sect4>
|
|
<title><link linkend="plperl">PL/Perl</link> Server-Side Language</title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Allow generic record arguments to PL/Perl functions (Andrew
|
|
Dunstan)
|
|
</para>
|
|
|
|
<para>
|
|
PL/Perl functions can now be declared to accept type <type>record</>.
|
|
The behavior is the same as for any named composite type.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Convert PL/Perl array arguments to Perl arrays (Alexey Klyukin,
|
|
Alex Hunsaker)
|
|
</para>
|
|
|
|
<para>
|
|
String representations are still available.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Convert PL/Perl composite-type arguments to Perl hashes
|
|
(Alexey Klyukin, Alex Hunsaker)
|
|
</para>
|
|
|
|
<para>
|
|
String representations are still available.
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
</sect4>
|
|
|
|
<sect4>
|
|
<title><link linkend="plpython">PL/Python</link> Server-Side Language</title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add table function support for PL/Python (Jan Urbanski)
|
|
</para>
|
|
|
|
<para>
|
|
PL/Python can now return multiple <literal>OUT</> parameters
|
|
and record sets.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add a validator to PL/Python (Jan Urbanski)
|
|
</para>
|
|
|
|
<para>
|
|
This allows PL/Python functions to be syntax-checked at function
|
|
creation time.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Allow exceptions for SQL queries in PL/Python (Jan Urbanski)
|
|
</para>
|
|
|
|
<para>
|
|
This allows access to SQL-generated exception error codes from
|
|
PL/Python exception blocks.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add PL/Python explicit subtransactions (Jan Urbanski)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add PL/Python functions for quoting strings (Jan Urbanski)
|
|
</para>
|
|
|
|
<para>
|
|
The functions are <link
|
|
linkend="plpython-util"><literal>plpy.quote_ident</></link>,
|
|
<link linkend="plpython-util"><literal>plpy.quote_literal</></link>,
|
|
and <link
|
|
linkend="plpython-util"><literal>plpy.quote_nullable</></link>.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add traceback information to PL/Python errors (Jan Urbanski)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Report PL/Python errors from iterators with <literal>PLy_elog</> (Jan
|
|
Urbanski)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Fix exception handling with Python 3 (Jan Urbanski)
|
|
</para>
|
|
|
|
<para>
|
|
Exception classes were previously not available in
|
|
<literal>plpy</> under Python 3.
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
</sect4>
|
|
|
|
</sect3>
|
|
|
|
<sect3>
|
|
<title>Client Applications</title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Mark <link
|
|
linkend="APP-CREATELANG"><application>createlang</></link>
|
|
and <link linkend="APP-DROPLANG"><application>droplang</></link>
|
|
as deprecated now that they just invoke extension commands (Tom
|
|
Lane)
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
<sect4>
|
|
<title><link linkend="APP-PSQL"><application>psql</></link></title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add <application>psql</> command <literal>\conninfo</>
|
|
to show current connection information (David Christensen)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add <application>psql</> command <literal>\sf</> to
|
|
show a function's definition (Pavel Stehule)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add <application>psql</> command <literal>\dL</> to list
|
|
languages (Fernando Ike)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add <option>S</> (<quote>system</>) option to <application>psql</>'s
|
|
<literal>\dn</> (list schemas) command (Tom Lane)
|
|
</para>
|
|
|
|
<para>
|
|
<literal>\dn</> without <literal>S</> now suppresses system
|
|
schemas.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Allow <application>psql</>'s <literal>\e</> and <literal>\ef</>
|
|
commands to accept a line number to be used to position the
|
|
cursor in the editor (Pavel Stehule)
|
|
</para>
|
|
|
|
<para>
|
|
This is passed to the editor according to the
|
|
<envar>PSQL_EDITOR_LINENUMBER_ARG</> environment variable.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Have <application>psql</> set the client encoding from the
|
|
operating system locale by default (Heikki Linnakangas)
|
|
</para>
|
|
|
|
<para>
|
|
This only happens if the <envar>PGCLIENTENCODING</> environment
|
|
variable is not set.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Make <literal>\d</literal> distinguish between unique
|
|
indexes and unique constraints (Josh Kupershmidt)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Make <literal>\dt+</literal> report <function>pg_table_size</>
|
|
instead of <function>pg_relation_size</> when talking to 9.0 or
|
|
later servers (Bernd Helmle)
|
|
</para>
|
|
|
|
<para>
|
|
This is a more useful measure of table size, but note that it is
|
|
not identical to what was previously reported in the same display.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Additional tab completion support (Itagaki Takahiro, Pavel Stehule,
|
|
Andrey Popp, Christoph Berg, David Fetter, Josh Kupershmidt)
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
</sect4>
|
|
|
|
<sect4>
|
|
<title><link linkend="APP-PGDUMP"><application>pg_dump</></link></title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add <link linkend="APP-PGDUMP"><application>pg_dump</></link>
|
|
and <link
|
|
linkend="APP-PG-DUMPALL"><application>pg_dumpall</></link>
|
|
option <option>--quote-all-identifiers</> to force quoting
|
|
of all identifiers (Robert Haas)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add <literal>directory</> format to <application>pg_dump</>
|
|
(Joachim Wieland, Heikki Linnakangas)
|
|
</para>
|
|
|
|
<para>
|
|
This is internally similar to the <literal>tar</>
|
|
<application>pg_dump</> format.
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
</sect4>
|
|
|
|
<sect4>
|
|
<title><link linkend="APP-PG-CTL"><application>pg_ctl</></link></title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Fix <application>pg_ctl</>
|
|
so it no longer incorrectly reports that the server is not
|
|
running (Bruce Momjian)
|
|
</para>
|
|
|
|
<para>
|
|
Previously this could happen if the server was running but
|
|
<application>pg_ctl</> could not authenticate.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Improve <application>pg_ctl</> start's <quote>wait</quote>
|
|
(<option>-w</>) option (Bruce Momjian, Tom Lane)
|
|
</para>
|
|
|
|
<para>
|
|
The wait mode is now significantly more robust. It will not get
|
|
confused by non-default postmaster port numbers, non-default
|
|
Unix-domain socket locations, permission problems, or stale
|
|
postmaster lock files.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add <literal>promote</> option to <application>pg_ctl</> to
|
|
switch a standby server to primary (Fujii Masao)
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
</sect4>
|
|
|
|
</sect3>
|
|
|
|
<sect3>
|
|
<title><application>Development Tools</></title>
|
|
|
|
<sect4>
|
|
<title><link linkend="libpq"><application>libpq</></link></title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add a libpq connection option <literal>client_encoding</>
|
|
which behaves like the <envar>PGCLIENTENCODING</> environment
|
|
variable (Heikki Linnakangas)
|
|
</para>
|
|
|
|
<para>
|
|
The value <literal>auto</> sets the client encoding based on
|
|
the operating system locale.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add <link
|
|
linkend="libpq-pqlibversion"><function>PQlibVersion()</></link>
|
|
function which returns the libpq library version (Magnus
|
|
Hagander)
|
|
</para>
|
|
|
|
<para>
|
|
libpq already had <function>PQserverVersion()</> which returns
|
|
the server version.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Allow libpq database clients to
|
|
check the user name of the server process using <link
|
|
linkend="libpq-connect-requirepeer"><literal>requirepeer</></link>
|
|
when connecting via Unix-domain sockets
|
|
(Peter Eisentraut)
|
|
</para>
|
|
|
|
<para>
|
|
<productname>PostgreSQL</> already allowed servers to check
|
|
the client user name when connecting via Unix-domain sockets.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add <link linkend="libpq-pqping"><function>PQping()</></link>
|
|
and <link
|
|
linkend="libpq-pqpingparams"><function>PQpingParams()</></link>
|
|
to libpq (Bruce Momjian, Tom Lane)
|
|
</para>
|
|
|
|
<para>
|
|
These functions allow detection of the server's status without
|
|
trying to open a new session.
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
</sect4>
|
|
|
|
<sect4>
|
|
<title><link linkend="ecpg"><application>ECPG</></link></title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Allow ECPG to accept dynamic cursor names even in
|
|
<literal>WHERE CURRENT OF</literal> clauses
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
</sect4>
|
|
|
|
</sect3>
|
|
|
|
<sect3>
|
|
<title>Build Options</title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Use <literal>+Olibmerrno</> compile flag with HP-UX C compilers
|
|
that accept it (Ibrar Ahmed)
|
|
</para>
|
|
|
|
<para>
|
|
This avoids possible misbehavior of math library calls on recent
|
|
HP platforms.
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
<sect4>
|
|
<title>Makefiles</title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Improved parallel make support (Peter Eisentraut)
|
|
</para>
|
|
|
|
<para>
|
|
This allows for faster compiles. Also, <literal>make -k</>
|
|
now works more consistently.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Require <acronym>GNU</> <link
|
|
linkend="install-requirements"><application>make</></link>
|
|
3.80 or newer (Peter Eisentraut)
|
|
</para>
|
|
|
|
<para>
|
|
This is necessary because of the parallel-make improvements.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add <literal>make maintainer-check</> target
|
|
(Peter Eisentraut)
|
|
</para>
|
|
|
|
<para>
|
|
This target performs various source code checks that are not
|
|
appropriate for either the build or the regression tests. Currently:
|
|
duplicate_oids, SGML syntax and tabs check, NLS syntax check.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Support <literal>make check</> in <filename>contrib</>
|
|
(Peter Eisentraut)
|
|
</para>
|
|
|
|
<para>
|
|
Formerly only <literal>make installcheck</> worked, but now
|
|
there is support for testing in a temporary installation.
|
|
The top-level <literal>make check-world</> target now includes
|
|
testing <filename>contrib</> this way.
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
</sect4>
|
|
|
|
<sect4>
|
|
<title>Windows</title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
On Windows, allow <link
|
|
linkend="app-pg-ctl"><application>pg_ctl</></link> to register
|
|
the service as auto-start or start-on-demand (Quan Zongliang)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add support for collecting <link linkend="windows-crash-dumps">crash
|
|
dumps</link> on Windows (Craig Ringer, Magnus Hagander)
|
|
</para>
|
|
|
|
<para>
|
|
<productname>minidumps</> can now be generated by non-debug
|
|
Windows binaries and analyzed by standard debugging tools.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Enable building with the MinGW64 compiler (Andrew Dunstan)
|
|
</para>
|
|
|
|
<para>
|
|
This allows building 64-bit Windows binaries even on non-Windows
|
|
platforms via cross-compiling.
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
</sect4>
|
|
|
|
</sect3>
|
|
|
|
<sect3>
|
|
<title>Source Code</title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Revise the API for GUC variable assign hooks (Tom Lane)
|
|
</para>
|
|
|
|
<para>
|
|
The previous functions of assign hooks are now split between check
|
|
hooks and assign hooks, where the former can fail but the latter
|
|
shouldn't. This change will impact add-on modules that define custom
|
|
GUC parameters.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add latches to the source code to wait for events (Heikki
|
|
Linnakangas)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Centralize data modification permissions-checking logic
|
|
(KaiGai Kohei)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add missing <function>get_<replaceable>object</>_oid()</function> functions, for consistency
|
|
(Robert Haas)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Improve ability to use C++ compilers for <link
|
|
linkend="xfunc-c">compiling add-on modules</link> by removing
|
|
conflicting key words (Tom Lane)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add support for DragonFly <acronym>BSD</> (Rumko)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Expose <function>quote_literal_cstr()</> for backend use
|
|
(Robert Haas)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Run <link linkend="build">regression tests</link> in the
|
|
default encoding (Peter Eisentraut)
|
|
</para>
|
|
|
|
<para>
|
|
Regression tests were previously always run with
|
|
<literal>SQL_ASCII</> encoding.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add <application>src/tools/git_changelog</> to replace
|
|
<application>cvs2cl</> and <application>pgcvslog</> (Robert
|
|
Haas, Tom Lane)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add <application>git-external-diff</> script to
|
|
<filename>src/tools</> (Bruce Momjian)
|
|
</para>
|
|
|
|
<para>
|
|
This is used to generate context diffs from git.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Improve support for building with
|
|
<application>Clang</application> (Peter Eisentraut)
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
<sect4>
|
|
<title>Server Hooks</title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add source code hooks to check permissions (Robert Haas,
|
|
Stephen Frost)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add post-object-creation function hooks for use by security
|
|
frameworks (KaiGai Kohei)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add a client authentication hook (KaiGai Kohei)
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
</sect4>
|
|
|
|
</sect3>
|
|
|
|
<sect3>
|
|
<title>Contrib</title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Modify <filename>contrib</> modules and stored procedure
|
|
languages to install via the new <link
|
|
linkend="extend-extensions">extension</link> mechanism (Tom Lane,
|
|
Dimitri Fontaine)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add <link linkend="file-fdw"><filename>contrib/file_fdw</></link>
|
|
foreign-data wrapper (Shigeru Hanada)
|
|
</para>
|
|
|
|
<para>
|
|
Foreign tables using this foreign data wrapper can read flat files
|
|
in a manner very similar to <command>COPY</>.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add nearest-neighbor support to <link
|
|
linkend="pgtrgm"><filename>contrib/pg_trgm</></link> and <link
|
|
linkend="btree-gist"><filename>contrib/btree_gist</></link>
|
|
(Teodor Sigaev)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add <link
|
|
linkend="btree-gist"><filename>contrib/btree_gist</></link>
|
|
support for searching on not-equals (Jeff Davis)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Fix <link
|
|
linkend="fuzzystrmatch"><filename>contrib/fuzzystrmatch</></link>'s
|
|
<function>levenshtein()</> function to handle multibyte characters
|
|
(Alexander Korotkov)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add <function>ssl_cipher()</> and <function>ssl_version()</>
|
|
functions to <link
|
|
linkend="sslinfo"><filename>contrib/sslinfo</></link> (Robert
|
|
Haas)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Fix <link linkend="intarray"><filename>contrib/intarray</></link>
|
|
and <link linkend="hstore"><filename>contrib/hstore</></link>
|
|
to give consistent results with indexed empty arrays (Tom Lane)
|
|
</para>
|
|
|
|
<para>
|
|
Previously an empty-array query that used an index might return
|
|
different results from one that used a sequential scan.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Allow <link linkend="intarray"><filename>contrib/intarray</></link>
|
|
to work properly on multidimensional arrays (Tom Lane)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
In
|
|
<link linkend="intarray"><filename>contrib/intarray</></link>,
|
|
avoid errors complaining about the presence of nulls in cases where no
|
|
nulls are actually present (Tom Lane)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
In
|
|
<link linkend="intarray"><filename>contrib/intarray</></link>,
|
|
fix behavior of containment operators with respect to empty arrays
|
|
(Tom Lane)
|
|
</para>
|
|
|
|
<para>
|
|
Empty arrays are now correctly considered to be contained in any other
|
|
array.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Remove <link linkend="xml2"><filename>contrib/xml2</></link>'s
|
|
arbitrary limit on the number of
|
|
<replaceable>parameter</>=<replaceable>value</> pairs that can be
|
|
handled by <function>xslt_process()</> (Pavel Stehule)
|
|
</para>
|
|
|
|
<para>
|
|
The previous limit was 10.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
In <link linkend="pageinspect"><filename>contrib/pageinspect</></link>,
|
|
fix heap_page_item to return infomasks as 32-bit values (Alvaro Herrera)
|
|
</para>
|
|
|
|
<para>
|
|
This avoids returning negative values, which was confusing. The
|
|
underlying value is a 16-bit unsigned integer.
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
<sect4>
|
|
<title>Security</title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add <link linkend="sepgsql"><filename>contrib/sepgsql</></link>
|
|
to interface permission checks with <acronym>SE</>-Linux (KaiGai Kohei)
|
|
</para>
|
|
|
|
<para>
|
|
This uses the new <link
|
|
linkend="SQL-SECURITY-LABEL"><command>SECURITY LABEL</></link>
|
|
facility.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add contrib module <link
|
|
linkend="auth-delay"><filename>auth_delay</></link> (KaiGai
|
|
Kohei)
|
|
</para>
|
|
|
|
<para>
|
|
This causes the server to pause before returning authentication
|
|
failure; it is designed to make brute force password attacks
|
|
more difficult.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add <link linkend="dummy-seclabel">dummy_seclabel</link>
|
|
contrib module (KaiGai Kohei)
|
|
</para>
|
|
|
|
<para>
|
|
This is used for permission regression testing.
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
</sect4>
|
|
|
|
<sect4>
|
|
<title>Performance</title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add support for <literal>LIKE</> and <literal>ILIKE</> index
|
|
searches to <link
|
|
linkend="pgtrgm"><filename>contrib/pg_trgm</></link> (Alexander
|
|
Korotkov)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add <function>levenshtein_less_equal()</> function to <link
|
|
linkend="fuzzystrmatch"><filename>contrib/fuzzystrmatch</></link>,
|
|
which is optimized for small distances (Alexander Korotkov)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Improve performance of index lookups on <link
|
|
linkend="seg"><filename>contrib/seg</></link> columns (Alexander
|
|
Korotkov)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Improve performance of <link
|
|
linkend="pgupgrade"><application>pg_upgrade</></link> for
|
|
databases with many relations (Bruce Momjian)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add flag to <link
|
|
linkend="pgbench"><filename>contrib/pgbench</></link> to
|
|
report per-statement latencies (Florian Pflug)
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
</sect4>
|
|
|
|
<sect4>
|
|
<title>Fsync Testing</title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Move <filename>src/tools/test_fsync</> to <link
|
|
linkend="pgtestfsync"><filename>contrib/pg_test_fsync</></link>
|
|
(Bruce Momjian, Tom Lane)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add <literal>O_DIRECT</> support to <link
|
|
linkend="pgtestfsync"><filename>contrib/pg_test_fsync</></link>
|
|
(Bruce Momjian)
|
|
</para>
|
|
|
|
<para>
|
|
This matches the use of <literal>O_DIRECT</> by <link
|
|
linkend="guc-wal-sync-method"><varname>wal_sync_method</></link>.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add new tests to <link
|
|
linkend="pgtestfsync"><filename>contrib/pg_test_fsync</></link>
|
|
(Bruce Momjian)
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
</sect4>
|
|
|
|
</sect3>
|
|
|
|
<sect3>
|
|
<title>Documentation</title>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
<para>
|
|
Extensive <link linkend="ecpg"><application>ECPG</> documentation</link>
|
|
improvements (Satoshi Nagayasu)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Extensive proofreading and documentation improvements
|
|
(Thom Brown, Josh Kupershmidt, Susanne Ebrecht)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add documentation for <link
|
|
linkend="guc-exit-on-error"><varname>exit_on_error</></link>
|
|
(Robert Haas)
|
|
</para>
|
|
|
|
<para>
|
|
This parameter causes sessions to exit on any error.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add documentation for <link
|
|
linkend="functions-info-catalog-table"><function>pg_options_to_table()</></link>
|
|
(Josh Berkus)
|
|
</para>
|
|
|
|
<para>
|
|
This function shows table storage options in a readable form.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Document that it is possible to access all composite type
|
|
fields using <link
|
|
linkend="field-selection"><literal>(compositeval).*</></link>
|
|
syntax (Peter Eisentraut)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Document that <link
|
|
linkend="functions-string-other"><function>translate()</></link>
|
|
removes characters in <literal>from</> that don't have a
|
|
corresponding <literal>to</> character (Josh Kupershmidt)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Merge docs for <command>CREATE CONSTRAINT TRIGGER</> and <link
|
|
linkend="SQL-CREATETRIGGER"><command>CREATE TRIGGER</></link>
|
|
(Alvaro Herrera)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Centralize <link linkend="ddl-priv">permission</link> and <link
|
|
linkend="upgrading">upgrade</link> documentation (Bruce Momjian)
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add <link linkend="sysvipc-parameters">kernel tuning
|
|
documentation</link> for Solaris 10 (Josh Berkus)
|
|
</para>
|
|
|
|
<para>
|
|
Previously only Solaris 9 kernel tuning was documented.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Handle non-ASCII characters consistently in <filename>HISTORY</> file
|
|
(Peter Eisentraut)
|
|
</para>
|
|
|
|
<para>
|
|
While the <filename>HISTORY</> file is in English, we do have to deal
|
|
with non-ASCII letters in contributor names. These are now
|
|
transliterated so that they are reasonably legible without assumptions
|
|
about character set.
|
|
</para>
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
</sect3>
|
|
|
|
</sect2>
|
|
</sect1>
|