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Release notes for 9.1alpha3
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‎doc/src/sgml/release-9.1.sgml

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<!-- doc/src/sgml/release-9.1.sgml -->
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<!-- This is up-to-date with commits through 2010-10-29 -->
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<!-- This is up-to-date with commits through 2010-12-23 -->
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<sect1 id="release-9-1-alpha">
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<title>Release 9.1alpha2</title>
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<title>Release 9.1alpha3</title>
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<sect2>
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<title>Overview</title>
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<para>
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<listitem>
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<para>
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<emphasis>Add ALTER TYPE ... ADD/DROP/ALTER/RENAME ATTRIBUTE</emphasis>
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<emphasis>Add ALTER ... SET SCHEMA support for conversions,
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operators, operator classes, operator families, text search
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configurations, text search dictionaries, text search
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parsers, and text search templates</emphasis>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Support triggers on views</emphasis>
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<emphasis>Make TRUNCATE ... RESTART IDENTITY restart
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sequences transactionally</emphasis>
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</para>
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<para>
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Previously, the sequence restart did not roll back on error.
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This meant that an error between truncating and committing
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left the sequences out of sync with the table contents, with
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potentially bad consequences as were noted in a Warning on
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the TRUNCATE man page.
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Prevent invoking I/O conversion casts via
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functional/attribute notation</emphasis>
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</para>
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<para>
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This was found to be confusing in some cases. The
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functionality is still available via cast syntax.
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</para>
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</listitem>
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<listitem>
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<para>
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Add ALTER TYPE ... ADD/DROP/ALTER/RENAME ATTRIBUTE
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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 triggers on views
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</para>
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<para>
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<listitem>
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<para>
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<emphasis>Allow WITH clauses to be attached to INSERT, UPDATE, DELETE
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statements</emphasis>
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Allow WITH clauses to be attached to INSERT, UPDATE, DELETE
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statements
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</para>
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<para>
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<listitem>
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<para>
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<emphasis>Allow new values to be added to an existing enum type</emphasis>
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Allow new values to be added to an existing enum type
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Support MergeAppend plans, to allow sorted output
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from append relations</emphasis>
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<emphasis>Optimize the commit_siblings configuration parameter</emphasis>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>KNN GiST, otherwise known as order-by-operator support for GiST</emphasis>
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</para>
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<para>
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This can be used to optimize nearest-neighbor searches.
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Improve process shutdown speed</emphasis>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Speed up conversion of signed integers to C strings</emphasis>
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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 MergeAppend plans, to allow sorted output
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from append relations
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</para>
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<para>
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<listitem>
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<para>
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<emphasis>Reduce the memory requirement for large ispell dictionaries</emphasis>
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Reduce the memory requirement for large ispell dictionaries
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Teach CLUSTER to use seqscan-and-sort when it's faster than
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indexscan</emphasis>
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Teach CLUSTER to use seqscan-and-sort when it's faster than
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indexscan
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Improve GIN indexscan cost estimation</emphasis>
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Improve GIN indexscan cost estimation
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Performance improvements in pg_upgrade for uses with many tables</emphasis>
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Performance improvements in pg_upgrade for uses with many tables
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</para>
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</listitem>
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<para>
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<emphasis>Allow pg_ctl to register the service in either AUTO or DEMAND start
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type</emphasis>
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<emphasis>Instrument checkpoint sync calls</emphasis>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Use the same lexer for recovery.conf that has been used for postgresql.conf</emphasis>
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</para>
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<para>
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Among other things, this allows values in recovery.conf to be unquoted.
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Add column buffers_backend_fsync to pg_stat_bgwriter</emphasis>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Add monitoring function pg_last_xact_replay_timestamp()</emphasis>
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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 pg_ctl to register the service in either AUTO or DEMAND start
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type
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Support host names and host key
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Support host names and host key
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word <literal>all</literal>
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in <filename>pg_hba.conf</filename></emphasis>
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in <filename>pg_hba.conf</filename>
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</para>
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</listitem>
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<emphasis>Add SECURITY LABEL command</emphasis>
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Add SECURITY LABEL command
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</para>
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<para>
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This is intended as infrastructure to support integration
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<listitem>
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<para>
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<emphasis>Accept <literal>public</literal> as a pseudo-role
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<emphasis>Add pg_read_binary_file() and whole-file-at-once
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versions of pg_read_file()</emphasis>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Add new function format(), for sprintf-like string formatting</emphasis>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Add pg_describe_object() function to obtain textual
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descriptions of objects as stored in pg_depend</emphasis>
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</para>
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</listitem>
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<listitem>
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<para>
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Accept <literal>public</literal> as a pseudo-role
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name in <literal>has_table_privilege()</literal> and friends
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to see if a particular privilege has been granted to
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<literal>PUBLIC</literal></emphasis>
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<literal>PUBLIC</literal>
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</para>
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</listitem>
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<title>psql</title>
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<itemizedlist>
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<listitem>
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<para>
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<emphasis>Add <quote>S</quote> option to \dn command in psql</emphasis>
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</para>
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<para>
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System schemas are now hidden by default by \dn.
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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>libpq</title>
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<itemizedlist>
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<listitem>
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<para>
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<emphasis>Add PQlibVersion() function</emphasis>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>When reporting the server as not responding, if the
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hostname was supplied, also print the IP address</emphasis>
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</para>
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<para>
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This allows IPv4 and IPv6 failures to be distinguished. Also
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useful when a hostname resolves to multiple IP addresses.
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Add functions PQping and PQpingParams to allow
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detection of the server's status, including a status where
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the server is running but refuses ordinary connections</emphasis>
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</para>
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<para>
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pg_ctl uses the new function. This fixes the case where
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pg_ctl reports that the server is not running (cannot
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connect) but in fact it is running.
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</para>
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</listitem>
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</itemizedlist>
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</sect3>
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<title>Procedural Languages</title>
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<sect4>
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<itemizedlist>
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<listitem>
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<para>
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<emphasis>Allow generic record arguments to PL/Perl functions</emphasis>
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Allow generic record arguments to PL/Perl functions
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</para>
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</listitem>
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</itemizedlist>
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<para>
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<emphasis>Updates to contrib/isn ISBN tables</emphasis>
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<emphasis>New module contrib/auth_delay</emphasis>
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</para>
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</listitem>
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<listitem>
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<para>
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Updates to contrib/isn ISBN tables
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</para>
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</listitem>
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<title>Source Code, Build Options</title>
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<itemizedlist>
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<listitem>
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<para>
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<emphasis>Rewrite the GiST insertion logic so that the
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post-recovery cleanup stage to finish incomplete inserts or
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splits is not needed anymore</emphasis>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Add support for collecting
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<quote>minidump</quote>-style crash dumps on
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Windows</emphasis>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Replace pg_class.relistemp column with relpersistence</emphasis>
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</para>
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<para>
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This is for upcoming work on unlogged and global temporary 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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<emphasis>GNU make 3.80 or newer is now required</emphasis>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Improved support for parallel make, make -k, and make -q</emphasis>
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</para>
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</listitem>
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<para>
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Include the backend ID in the relpath of temporary

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