--- /dev/null
+<!-- doc/src/sgml/release-10.sgml -->
+<!-- See header comment in release.sgml about typical markup -->
+
+ <sect1 id="release-10">
+ <title>Release 10</title>
+
+ <note>
+ <title>Release Date</title>
+ <simpara>2017-09-XX</simpara>
+ <simpara>CURRENT AS OF 2017-04-22</simpara>
+ </note>
+
+ <sect2>
+ <title>Overview</title>
+
+ <para>
+ Major enhancements in <productname>PostgreSQL</> 10 include:
+ </para>
+
+ <!-- Items in this list summarize one or more items below -->
+
+ <itemizedlist>
+
+ <listitem><para> </para></listitem>
+ </itemizedlist>
+
+ <para>
+ The above items are explained in more detail in the sections below.
+ </para>
+
+ </sect2>
+
+ <sect2>
+
+ <title>Migration to Version 10</title>
+
+ <para>
+ A dump/restore using <xref linkend="app-pg-dumpall">, or use of <xref
+ linkend="pgupgrade">, is required for those wishing to migrate data
+ from any previous release.
+ </para>
+
+ <para>
+ Version 10 contains a number of changes that may affect compatibility
+ with previous releases. Observe the following incompatibilities:
+ </para>
+
+ <itemizedlist>
+
+<listitem>
+<!--
+Author: Robert Haas <rhaas@postgresql.org>
+2016-11-30 [6d46f4783] Improve hash index bucket split behavior.
+Author: Robert Haas <rhaas@postgresql.org>
+2017-02-07 [293e24e50] Cache hash index's metapage in rel->rd_amcache.
+Author: Robert Haas <rhaas@postgresql.org>
+2017-02-27 [b0f18cb77] hash: Refactor bucket squeeze code.
+Author: Robert Haas <rhaas@postgresql.org>
+2017-02-27 [30df93f69] hash: Refactor overflow page allocation.
+Author: Robert Haas <rhaas@postgresql.org>
+2017-04-03 [ea69a0dea] Expand hash indexes more gradually.
+-->
+<para>
+Improve hash bucket split performance by reducing locking requirements
+(Amit Kapila, Mithun Cy)
+</para>
+
+<para>
+Also cache hash index meta-information for faster lookups. Additional
+hash performance improvements have also been made. <application>pg_upgrade</>'d hash
+indexes from previous major Postgres versions must be rebuilt.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Peter Eisentraut <peter_e@gmx.net>
+2017-03-27 [3371e4d9b] Change default of log_directory to 'log'
+-->
+<para>
+Change the default <link linkend="guc-log-destination">log directory</> from <filename>pg_log</> to <filename>log</> (Andreas
+Karlsson)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Robert Haas <rhaas@postgresql.org>
+2017-03-17 [88e66d193] Rename "pg_clog" directory to "pg_xact".
+-->
+<para>
+Rename transaction status directory <filename>pg_clog</> directory to <filename>pg_xact</>
+(Michael Paquier)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Magnus Hagander <magnus@hagander.net>
+2017-01-04 [9a4d51077] Make wal streaming the default mode for pg_basebackup
+-->
+<para>
+Have <application><xref linkend="app-pgbasebackup"></> stream the <acronym>WAL</> needed to restore the backup by
+default (Magnus Hagander)
+</para>
+
+<para>
+This changes the <application>pg_basebackup</> <option>-X</>/<option>--xlog-method</> default to <literal>stream</>.
+An option value <literal>none</> has been added to recreate the old
+behavior. The <application>pg_basebackup</> option <option>-x</> has been removed (use <option>-X</> fetch).
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Peter Eisentraut <peter_e@gmx.net>
+2017-01-14 [05cd12ed5] pg_ctl: Change default to wait for all actions
+-->
+<para>
+Make all <application><xref linkend="app-pg-ctl"></> actions wait by default for completion (Peter Eisentraut)
+</para>
+
+<para>
+Previously some <application>pg_ctl</> actions didn't wait for completion, and required
+the use of <option>-w</> to do so.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Heikki Linnakangas <heikki.linnakangas@iki.fi>
+2016-10-26 [94aceed31] Support multi-dimensional arrays in PL/python.
+Author: Heikki Linnakangas <heikki.linnakangas@iki.fi>
+2016-10-26 [cfd9c87a5] Only treat Python Lists as array dimensions.
+-->
+<para>
+Allow multi-dimensional arrays to be passed into PL/Python functions,
+and returned as nested Python lists (Alexey Grishchenko, Dave Cramer,
+Heikki Linnakangas)
+</para>
+
+<para>
+This makes a backwards-incompatible change to the handling of composite
+types in arrays. Previously, you could return an array of composite types
+as "[[col1, col2], [col1, col2]]", but now that is interpreted as a two-
+dimensional array. Composite types in arrays must now be returned as
+Python tuples, not lists, to resolve the ambiguity. I.e. "[(col1, col2),
+(col1, col2)]". See the documentation for more details. CLARIFY
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2017-02-27 [817f2a586] Remove PL/Tcl's "module" facility.
+-->
+<para>
+Remove PL/Tcl's "module" auto-loading facility (Tom Lane)
+</para>
+
+<para>
+Replaced by new PL/Tcl startup <acronym>GUC</>s.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Robert Haas <rhaas@postgresql.org>
+2016-12-23 [e13486eba] Remove sql_inheritance <acronym>GUC</>.
+-->
+<para>
+Remove <varname>sql_inheritance</> <acronym>GUC</> (Robert Haas)
+</para>
+
+<para>
+Changing this from the default value caused queries referencing parent
+tables to not include children tables. The <acronym>SQL</> standard requires such
+behavior and this has been the default since Postgres 7.1.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Robert Haas <rhaas@postgresql.org>
+2017-02-15 [51ee6f316] Replace min_parallel_relation_size with two new <acronym>GUC</>s.
+-->
+<para>
+Add <acronym>GUC</>s <xref linkend="guc-min-parallel-table-scan-size"> and
+<xref linkend="guc-min-parallel-index-scan-size">
+to control parallel operation (Amit Kapila, Robert Haas)
+</para>
+
+<para>
+This replaces <varname>min_parallel_relation_size</>, which was too generic.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2017-02-23 [b6aa17e0a] De-support floating-point timestamps.
+-->
+<para>
+Remove support for floating-point datetimes/timestamps (Tom Lane)
+</para>
+
+<para>
+This removes configure's <option>--disable-integer-datetimes</> option.
+Floating-point datetimes/timestamps have not been the default
+since Postgres 8.3 and have few advantages.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2016-10-11 [2f1eaf87e] Drop server support for <acronym>FE/BE</> protocol version 1.0.
+-->
+<para>
+Remove support for client/server protocol version 1.0 (Tom Lane)
+</para>
+
+<para>
+This protocol hasn't had client support since Postgres 6.3.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Robert Haas <rhaas@postgresql.org>
+2017-02-13 [7ada2d31f] Remove contrib/tsearch2.
+-->
+<para>
+Remove contrib/tsearch2 (Robert Haas)
+</para>
+
+<para>
+This removes compatibility with the contrib version of full text search
+that shipped in pre-8.3 Postgres versions.
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect2>
+
+ <sect2>
+ <title>Changes</title>
+
+ <para>
+ Below you will find a detailed account of the changes between
+ <productname>PostgreSQL</productname> 10 and the previous major
+ release.
+ </para>
+
+ <sect3>
+ <title>Server</title>
+
+ <sect4>
+ <title>Parallel Queries</title>
+
+ <itemizedlist>
+
+<listitem>
+<!--
+Author: Robert Haas <rhaas@postgresql.org>
+2017-02-15 [569174f1b] btree: Support parallel index scans.
+Author: Robert Haas <rhaas@postgresql.org>
+2017-02-15 [5262f7a4f] Add optimizer and executor support for parallel index sc
+Author: Robert Haas <rhaas@postgresql.org>
+2017-02-19 [0414b26ba] Add optimizer and executor support for parallel index-on
+-->
+<para>
+Support parallel btree index scans (Rahila Syed, Amit Kapila, Robert
+Haas)
+</para>
+
+<para>
+Allows btree index pages to be checked by separate parallel workers.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Robert Haas <rhaas@postgresql.org>
+2017-03-08 [98e6e8904] tidbitmap: Support shared iteration.
+Author: Robert Haas <rhaas@postgresql.org>
+2017-03-08 [f35742ccb] Support parallel bitmap heap scans.
+-->
+<para>
+Support parallel bitmap heap scans (Dilip Kumar)
+</para>
+
+<para>
+This allows a single index scan to dispatch parallel workers to process
+different areas of the heap.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Robert Haas <rhaas@postgresql.org>
+2017-03-07 [3bc7dafa9] Consider parallel merge joins.
+-->
+<para>
+Allow merge joins to be performed in parallel (Dilip Kumar)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Robert Haas <rhaas@postgresql.org>
+2017-03-08 [98e6e8904] tidbitmap: Support shared iteration.
+Author: Robert Haas <rhaas@postgresql.org>
+2017-03-08 [f35742ccb] Support parallel bitmap heap scans.
+-->
+<para>
+Support parallel bitmap heap scans (Dilip Kumar)
+</para>
+
+<para>
+This allows a single index scan to dispatch parallel workers to process
+different areas of the heap.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Robert Haas <rhaas@postgresql.org>
+2017-03-09 [355d3993c] Add a Gather Merge executor node.
+-->
+<para>
+Improve ability of parallel workers to return pre-sorted data (Rushabh
+Lathia)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Robert Haas <rhaas@postgresql.org>
+2017-03-24 [61c2e1a95] Improve access to parallel query from procedural languag
+-->
+<para>
+Increase parallel query usage in procedural language functions (Robert
+Haas)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Robert Haas <rhaas@postgresql.org>
+2016-12-02 [b460f5d66] Add max_parallel_workers GUC.
+Author: Robert Haas <rhaas@postgresql.org>
+2016-12-05 [2b959d495] Reduce the default for max_worker_processes back to 8.
+-->
+<para>
+Add <acronym>GUC</> <xref linkend="guc-max-parallel-workers"> to limit the number of worker processes
+that can be used for parallelism (Julien Rouhaud)
+</para>
+
+<para>
+This can be set lower than <xref linkend="guc-max-worker-processes"> to reserve worker
+processes for non-parallel purposes.
+</para>
+</listitem>
+
+<listitem>
+<!--<listitem>
+Author: Robert Haas <rhaas@postgresql.org>
+2016-10-20 [f82ec32ac] Rename "pg_xlog" directory to "pg_wal"
+-->
+<para>
+Rename <filename>pg_xlog</> to <link linkend="wal"><filename>pg_wal</></> (Michael Paquier)
+</para>
+
+<para>
+This prevents the write-ahead log directory from being confused as
+containing server activity logs, and erroneously truncated.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Robert Haas <rhaas@postgresql.org>
+2017-02-09 [806091c96] Remove all references to "xlog" from SQL-callable functi
+Author: Robert Haas <rhaas@postgresql.org>
+2017-02-09 [85c11324c] Rename user-facing tools with "xlog" in the name to say
+Author: Robert Haas <rhaas@postgresql.org>
+2017-02-09 [62e8b3875] Rename command line options for ongoing xlog -> wal conv
+Author: Fujii Masao <fujii@postgresql.org>
+2017-02-15 [0dfa89ba2] Replace reference to "xlog-method" with "wal-method" in
+-->
+<para>
+Rename <acronym>SQL</> functions, tools, and options that reference <quote>xlog</> to <quote>wal</>
+(Robert Haas)
+</para>
+
+<para>
+For example, <function>pg_switch_xlog()</> becomes <function>pg_switch_wal()</>, <application>pg_receivexlog</>
+becomes <application>pg_receivewal</>, and <option>--xlogdir</> becomes <option>--waldir</>. This might
+require adjustments for prior-version scripts.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Andres Freund <andres@anarazel.de>
+2017-01-18 [69f4b9c85] Move targetlist SRF handling from expression evaluation
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2017-01-18 [f13a1277a] Doc: improve documentation of new SRF-in-tlist behavior.
+-->
+<para>
+Allow <literal>COALESCE</> and <literal>CASE</> to return multiple rows when evaluating
+set-returning functions (Andres Freund).
+</para>
+
+<para>
+This also prevents conditionals like <literal>CASE</> from controlling the
+execution of set-returning functions because set-returning functions
+are now executed earlier.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2016-10-12 [64f3524e2] Remove pg_dump/pg_dumpall support for dumping from pre-8
+-->
+<para>
+Remove <application>pg_dump</>/<application>pg_dumpall</> support for dumping from pre-8.0 servers (Tom
+Lane)
+</para>
+
+<para>
+Users needing dump support for pre-8.0 servers need to use dump binaries
+from Postgres 9.6.
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect4>
+
+ <sect4>
+ <title>Indexes</title>
+
+ <itemizedlist>
+
+<listitem>
+<!--
+Author: Robert Haas <rhaas@postgresql.org>
+2017-03-14 [c11453ce0] hash: Add write-ahead logging support.
+-->
+<para>
+Add write-ahead logging support to hash indexes (Amit Kapila)
+</para>
+
+<para>
+This makes hash indexes crash-safe and replicated, and removes the
+warning message about their use.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Robert Haas <rhaas@postgresql.org>
+2017-03-15 [6977b8b7f] Port single-page btree vacuum logic to hash indexes.
+-->
+<para>
+Allow single-page hash pruning (Ashutosh Sharma)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Andrew Dunstan <andrew@dunslane.net>
+2017-03-31 [e306df7f9] Full Text Search support for <type>JSON</> and <type>JSONB</>
+-->
+<para>
+Add full text search support for <type>JSON</> and <type>JSONB</> (Dmitry Dolgov)
+</para>
+
+<para>
+This is accessed via <function>ts_headline()</> and to_tsvector. RIGHT SECTION?
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2016-08-23 [77e290682] Create an SP-GiST opclass for inet/cidr.
+-->
+<para>
+Add <acronym>SP-GiST</> index support for <type>INET</> and <type>CIDR</> data types (Emre Hasegeli)
+</para>
+
+<para>
+These data types already had GiST support.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Teodor Sigaev <teodor@sigaev.ru>
+2017-03-23 [218f51584] Reduce page locking in <acronym>GIN</> vacuum
+-->
+<para>
+Reduce page locking during vacuuming of <acronym>GIN</> indexes (Andrey Borodin)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Alvaro Herrera <alvherre@alvh.no-ip.org>
+2017-04-01 [7526e1022] BRIN auto-summarization
+-->
+<para>
+Cause <acronym>BRIN</> index summarization to happen more aggressively (Álvaro
+Herrera)
+</para>
+
+<para>
+Specifically, summarize the previous page range when a new page range is
+created.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Alvaro Herrera <alvherre@alvh.no-ip.org>
+2017-04-01 [c655899ba] BRIN de-summarization
+-->
+<para>
+Add function <function>brin_desummarize_range()</> to remove <acronym>BRIN</> summarization of a
+specified range (Álvaro Herrera)
+</para>
+
+<para>
+This allows future <acronym>BRIN</> index summarization to be more compact. CLARIFY
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect4>
+
+ <sect4>
+ <title>Locking</title>
+
+ <itemizedlist>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2017-03-31 [64d4da511] For foreign keys, check <literal>REFERENCES</> privilege only on the
+-->
+<para>
+Only check for <literal>REFERENCES</> permission on referenced tables (Tom Lane)
+</para>
+
+<para>
+Previously <literal>REFERENCES</> permission on the referencing table was also
+required.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2016-09-05 [15bc038f9] Relax transactional restrictions on ALTER TYPE ... ADD V
+-->
+<para>
+Reduce locking required for adding values to enum types (Andrew Dunstan,
+Tom Lane)
+</para>
+
+<para>
+Previously it was impossible to run <command>ALTER TYPE ... ADD VALUE</> in a
+transaction block unless the enum type was created in the same block.
+Now, only references to uncommitted enum values from other transactions
+is prohibited.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Kevin Grittner <kgrittn@postgresql.org>
+2017-04-07 [c63172d60] Add GUCs for predicate lock promotion thresholds.
+-->
+<para>
+Allow tuning of predicate lock promotion thresholds (Dagfinn Ilmari
+Mannsåker)
+</para>
+
+<para>
+The new settings are <xref linkend="guc-max-pred-locks-per-relation"> and
+<varname>max_pred_locks_per_page</>.
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect4>
+
+ <sect4>
+ <title>Optimizer</title>
+
+ <itemizedlist>
+
+<listitem>
+<!--
+Author: Alvaro Herrera <alvherre@alvh.no-ip.org>
+2017-03-24 [7b504eb28] Implement multivariate n-distinct coefficients
+Author: Simon Riggs <simon@2ndQuadrant.com>
+2017-04-05 [2686ee1b7] Collect and use multi-column dependency stats
+-->
+<para>
+Add the ability to compute a correlation ratio and the number of
+distinct values on several columns (Tomas Vondra, David Rowley)
+</para>
+
+<para>
+New commands are <command><link linkend="SQL-CREATESTATISTICS">CREATE</></>,
+<command><link linkend="SQL-ALTERSTATISTICS">ALTER</></>, and
+<command><link linkend="SQL-DROPSTATISTICS">DROP STATISTICS</></>. This is helpful in
+estimating query memory usage and ... HOW IS RATIO USED?
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2017-01-15 [0777f7a2e] Fix matching of boolean index columns to sort ordering.
+-->
+<para>
+Improve planner matching of boolean indexes (Tom Lane)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Robert Haas <rhaas@postgresql.org>
+2017-03-16 [b30fb56b0] postgres_fdw: Push down <literal>FULL JOIN</>s with restriction clau
+-->
+<para>
+Improve optimization of <literal>FULL JOIN</> queries containing subqueries in the
+<literal>FROM</> clause (Etsuro Fujita)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2017-01-18 [215b43cdc] Improve RLS planning by marking individual quals with se
+-->
+<para>
+Improve performance of queries referencing row level security
+restrictions (Tom Lane)
+</para>
+
+<para>
+The optimizer now has more flexibility in reordering executor behavior.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Peter Eisentraut <peter_e@gmx.net>
+2017-03-23 [50c956add] Remove createlang and droplang
+-->
+<para>
+Remove createlang and droplang (Peter Eisentraut)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Andres Freund <andres@anarazel.de>
+2017-03-30 [5ded4bd21] Remove support for version-0 calling conventions.
+-->
+<para>
+Remove support for version-0 function calling conventions (Andres
+Freund)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2016-10-11 [2b860f52e] Remove "sco" and "unixware" ports.
+-->
+<para>
+Remove <systemitem class="osname">SCO</> and <systemitem class="osname">Unixware</> ports (Tom Lane)
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect4>
+
+ <sect4>
+ <title>General Performance</title>
+
+ <itemizedlist>
+
+<listitem>
+<!--
+Author: Heikki Linnakangas <heikki.linnakangas@iki.fi>
+2016-09-02 [9cca11c91] Speed up SUM calculation in numeric aggregates.
+-->
+<para>
+Speed up <function>SUM()</> calculations (Heikki Linnakangas)
+</para>
+
+<para>
+This uses an optimized numeric accumulator.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Heikki Linnakangas <heikki.linnakangas@iki.fi>
+2017-03-13 [aeed17d00] Use radix tree for character encoding conversions.
+-->
+<para>
+Improve the performance of character encoding conversions by using radix
+trees (Kyotaro Horiguchi, Heikki Linnakangas)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Andres Freund <andres@anarazel.de>
+2017-03-25 [b8d7f053c] Faster expression evaluation and targetlist projection.
+-->
+<para>
+Reduce the function call overhead during query execution (Andres Freund)
+</para>
+
+<para>
+This is particularly helpful for queries that process many rows.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Andrew Gierth <rhodiumtoad@postgresql.org>
+2017-03-27 [b5635948a] Support hashed aggregation with grouping sets.
+-->
+<para>
+Improve the performance of grouping sets (Andrew Gierth)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2017-04-07 [9c7f5229a] Optimize joins when the inner relation can be proven uni
+-->
+<para>
+Use uniqueness guarantees to optimize certain join types (David Rowley)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Teodor Sigaev <teodor@sigaev.ru>
+2017-03-29 [f90d23d0c] Implement SortSupport for macaddr data type
+-->
+<para>
+Improve sort performance of the macaddr data type (Brandur Leach)
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect4>
+
+ <sect4>
+ <title>Monitoring</title>
+
+ <itemizedlist>
+
+<listitem>
+<!--
+Author: Peter Eisentraut <peter_e@gmx.net>
+2016-11-18 [67dc4ccbb] Add pg_sequences view
+-->
+<para>
+Add <link linkend="view-pg-sequences"><structname>pg_sequences</></> view to show all sequences (Peter Eisentraut)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Peter Eisentraut <peter_e@gmx.net>
+2016-12-20 [1753b1b02] Add pg_sequence system catalog
+-->
+<para>
+Create a <link linkend="catalog-pg-sequence"><structname>pg_sequence</></> system catalog to store sequence metadata (Andreas
+Karlsson)
+</para>
+
+<para>
+Sequence metadata includes start, increment, etc, which is now
+transactional. Sequence counters are still stored in separate heap
+relations.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Stephen Frost <sfrost@snowman.net>
+2017-03-08 [f9b1a0dd4] Expose explain's SUMMARY option
+-->
+<para>
+Allow explicit control over <command><link linkend="SQL-EXPLAIN">EXPLAIN</></>'s display of planning and execution
+time (Stephen Frost)
+</para>
+
+<para>
+By default planning and execution is display by <command>EXPLAIN ANALYZE</> and not
+display in other cases. The new <command>EXPLAIN</> option <literal>SUMMARY</> allows explicit
+control of this.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2017-03-18 [17f8ffa1e] Fix <command>REFRESH MATERIALIZED VIEW</> to report activity to the
+-->
+<para>
+Properly update the statistics collector during <link linkend="SQL-REFRESHMATERIALIZEDVIEW"><command>REFRESH MATERIALIZED VIEW</></>
+(Jim Mlodgenski)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Simon Riggs <simon@2ndQuadrant.com>
+2017-03-30 [25fff4079] Default monitoring roles
+-->
+<para>
+Add default monitoring roles (Dave Page)
+</para>
+
+<para>
+New roles <literal>pg_monitor</>, <literal>pg_read_all_settings</>, <literal>pg_read_all_stats</>, and
+<literal>pg_stat_scan_tables</> allow simplified permission configuration.
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ <sect5>
+ <title>Logging</title>
+
+ <itemizedlist>
+
+<listitem>
+<!--
+Author: Robert Haas <rhaas@postgresql.org>
+2016-10-17 [7d3235ba4] By default, set log_line_prefix = '%m [%p] '.
+-->
+<para>
+Change <xref linkend="guc-log-line-prefix"> default to include current timestamp with milliseconds
+and the process id (Christoph Berg)
+</para>
+
+<para>
+The previous default was not to output a prefix.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Robert Haas <rhaas@postgresql.org>
+2017-03-16 [befd73c50] Add pg_ls_logdir() and pg_ls_waldir() functions.
+-->
+<para>
+Add functions to return the log and <acronym>WAL</> directory names (Dave Page)
+</para>
+
+<para>
+The new functions are <link linkend="functions-admin-genfile-table"><function>pg_ls_logdir()</></> and
+<link linkend="functions-admin-genfile-table"><function>pg_ls_waldir()</></> and can be
+executed by non-super users with the proper permissions.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Robert Haas <rhaas@postgresql.org>
+2017-03-03 [19dc233c3] Add pg_current_logfile() function.
+-->
+<para>
+Add function <link linkend="functions-info-session-table"><function>pg_current_logfile()</></> to read syslog's current stderr and
+csvlog output file names (Gilles Darold)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2017-03-10 [f9dfa5c97] Improve postmaster's logging of listen socket creation.
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2017-03-14 [2b32ac2a5] Include port number when logging successful binding to a
+-->
+<para>
+Report the address and port number of successful startup socket binding
+in the server logs (Tom Lane)
+</para>
+
+<para>
+Also, report bind socket failure details in the server logs.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2017-03-10 [6ec4c8584] Reduce log verbosity of startup/shutdown for launcher su
+-->
+<para>
+Reduce log chatter about the starting and stopping of launcher
+subprocesses (Tom Lane)
+</para>
+
+<para>
+These are now <literal>DEBUG1</>-level messages.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Robert Haas <rhaas@postgresql.org>
+2016-11-17 [a43f1939d] Remove or reduce verbosity of some debug messages.
+-->
+<para>
+Reduce message verbosity of lower-numbered debug levels controlled by
+<xref linkend="guc-log-min-messages"> (Robert Haas)
+</para>
+
+<para>
+This also changes the verbosity of <xref linkend="guc-client-min-messages"> debug levels.
+</para>
+</listitem>
+
+ </itemizedlist>
+ </sect5>
+
+ <sect5>
+ <title><link linkend="pg-stat-activity-view"><structname>pg_stat_activity</></link></title>
+
+ <itemizedlist>
+
+<listitem>
+<!--
+Author: Robert Haas <rhaas@postgresql.org>
+2016-10-04 [6f3bd98eb] Extend framework from commit 53be0b1ad to report latch w
+-->
+<para>
+Add <structname>pg_stat_activity</> reporting of latch wait states (Michael Paquier,
+Robert Haas)
+</para>
+
+<para>
+This includes the remaining wait events, like client reads, client
+writes, and synchronous replication.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Robert Haas <rhaas@postgresql.org>
+2017-03-18 [249cf070e] Create and use wait events for read, write, and fsync op
+-->
+<para>
+Add <structname>pg_stat_activity</> reporting of waits on reads, writes, and fsyncs
+(Rushabh Lathia)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Robert Haas <rhaas@postgresql.org>
+2017-03-26 [fc70a4b0d] Show more processes in pg_stat_activity.
+-->
+<para>
+Show auxiliary processes and background workers in <structname>pg_stat_activity</>
+(Kuntal Ghosh)
+</para>
+
+<para>
+New column <structfield>backend_type</> identifies the process type.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Simon Riggs <simon@2ndQuadrant.com>
+2016-09-12 [fc3d4a44e] Identify walsenders in pg_stat_activity
+-->
+<para>
+Display walsender processes in <structname>pg_stat_activity</> (Michael Paquier)
+</para>
+
+<para>
+This simplifies monitoring.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Robert Haas <rhaas@postgresql.org>
+2017-02-22 [4c728f382] Pass the source text for a parallel query to the workers
+-->
+<para>
+Allow <structname>pg_stat_activity</> to show the source query being executed by parallel workers
+(Rafia Sabih)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Robert Haas <rhaas@postgresql.org>
+2016-12-16 [3761fe3c2] Simplify LWLock tranche machinery by removing array_base
+-->
+<para>
+Rename <structname>pg_stat_activity</>.<structfield>wait_event_type</> values <literal>LWLockTranche</> and
+<literal>LWLockNamed</> to <literal>LWLock</> (Robert Haas)
+</para>
+
+<para>
+This makes the output more consistent.
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect5>
+
+ </sect4>
+
+ <sect4>
+ <title><acronym>Authentication</></title>
+
+ <itemizedlist>
+
+<listitem>
+<!--
+Author: Heikki Linnakangas <heikki.linnakangas@iki.fi>
+2017-03-07 [818fd4a67] Support SCRAM-SHA-256 authentication (RFC 5802 and 7677)
+Author: Heikki Linnakangas <heikki.linnakangas@iki.fi>
+2017-03-24 [7ac955b34] Allow SCRAM authentication, when pg_hba.conf says 'md5'.
+Author: Heikki Linnakangas <heikki.linnakangas@iki.fi>
+2017-04-07 [60f11b87a] Use SASLprep to normalize passwords for SCRAM authentica
+Author: Heikki Linnakangas <heikki.linnakangas@iki.fi>
+2017-04-18 [c727f120f] Rename "scram" to "scram-sha-256" in pg_hba.conf and pas
+-->
+<para>
+Add <link linkend="auth-pg-hba-conf"><literal>SCRAM-SHA-256</></> support for password negotiation and storage (Michael
+Paquier, Heikki Linnakangas)
+</para>
+
+<para>
+This proves better security than the existing 'md5' negotiation and
+storage method.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Heikki Linnakangas <heikki.linnakangas@iki.fi>
+2016-09-28 [babe05bc2] Turn password_encryption <acronym>GUC</> into an enum.
+-->
+<para>
+Change <acronym>GUC</> <xref linkend="guc-password-encryption"> from <type>boolean</> to <type>enum</> (Michael Paquier)
+</para>
+
+<para>
+This was necessary to support additional password hashing options.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2017-01-30 [de16ab723] Invent pg_hba_file_rules view to show the content of pg_
+-->
+<para>
+Add view <link linkend="view-pg-hba-file-rules"><structname>pg_hba_file_rules</></> to display the contents of <filename>pg_hba.conf</>
+(Haribabu Kommi)
+</para>
+
+<para>
+This shows the file contents, not the currently active settings.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Magnus Hagander <magnus@hagander.net>
+2017-03-22 [6b76f1bb5] Support multiple RADIUS servers
+-->
+<para>
+Support multiple <acronym>RADIUS</> servers (Magnus Hagander)
+</para>
+
+<para>
+All the <acronym>RADIUS</> related parameters are now plural and support a
+comma-separated list of servers.
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect4>
+
+ <sect4>
+ <title>Server Configuration</title>
+
+ <itemizedlist>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2017-01-02 [de41869b6] Allow SSL configuration to be updated at SIGHUP.
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2017-01-03 [1e942c747] Disable prompting for passphrase while (re)loading SSL c
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2017-01-04 [6667d9a6d] Re-allow SSL passphrase prompt at server start, but not
+-->
+<para>
+Allow <acronym>SSL</> configuration to be updated at <literal>SIGHUP</> (Andreas Karlsson, Tom Lane)
+</para>
+
+<para>
+This allows <acronym>SSL</> to be reconfigured without a server restart by using
+<command>pg_ctl reload</>, <command>SELECT pg_reload_conf()</>, or sending a
+<literal>SIGHUP</> signal.
+Reload <acronym>SSL</> configuration updates do not work if the <acronym>SSL</> key requires a
+passphrase.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Peter Eisentraut <peter_e@gmx.net>
+2016-11-30 [81c52728f] doc: Remove claim about large shared_buffers on Windows
+-->
+<para>
+Remove documented restriction about using large shared buffers on
+<systemitem class="osname">Windows</> (Tsunakawa, Takayuki)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Simon Riggs <simon@2ndQuadrant.com>
+2017-03-06 [21d4e2e20] Reduce lock levels for table storage params related to p
+Author: Simon Riggs <simon@2ndQuadrant.com>
+2017-04-05 [68ea2b7f9] Reduce lock level for CREATE STATISTICS
+-->
+<para>
+Reduce locking required to change table params (Simon Riggs, Fabrízio
+Mello)
+</para>
+
+<para>
+For example, changing a table's <xref linkend="guc-effective-io-concurrency"> setting can now
+be done with a more lightweight lock.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Robert Haas <rhaas@postgresql.org>
+2017-02-02 [14ca9abfb] Increase upper bound for bgwriter_lru_maxpages.
+-->
+<para>
+Make the maximum value of <xref linkend="guc-bgwriter-lru-maxpages"> effectively unlimited
+(Jim Nasby)
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect4>
+
+ <sect4>
+ <title>Reliability</title>
+
+ <itemizedlist>
+
+<listitem>
+<!--
+Author: Teodor Sigaev <teodor@sigaev.ru>
+2017-03-27 [1b02be21f] Fsync directory after creating or unlinking file.
+-->
+<para>
+Perform an fsync on the directory after creating or unlinking files
+(Michael Paquier)
+</para>
+
+<para>
+This reduces the risk of data loss after a power failure.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Robert Haas <rhaas@postgresql.org>
+2016-11-21 [a734fd5d1] autovacuum: Drop orphan temp tables more quickly but wit
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2016-11-27 [dafa0848d] Code review for early drop of orphaned temp relations in
+-->
+<para>
+Remove orphaned temporary tables more aggressively (Robert Haas, Tom Lane)
+</para>
+
+<para>
+Previously such tables were removed only when necessary. SECTION?
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ <sect5>
+ <title><link linkend="wal">Write-Ahead Log</> (<acronym>WAL</>)</title>
+
+ <itemizedlist>
+
+<listitem>
+<!--
+Author: Andres Freund <andres@anarazel.de>
+2016-12-22 [6ef2eba3f] Skip checkpoints, archiving on idle systems.
+-->
+<para>
+Prevent checkpoints and <acronym>WAL</> archiving on otherwise-idle systems (Michael
+Paquier)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Robert Haas <rhaas@postgresql.org>
+2017-02-08 [a507b8690] Add WAL consistency checking facility.
+Author: Robert Haas <rhaas@postgresql.org>
+2017-03-14 [bb4a39637] hash: Support WAL consistency checking.
+-->
+<para>
+Add <acronym>GUC</> <xref linkend="guc-wal-consistency-checking"> to add details to <acronym>WAL</> that can be
+sanity-checked on the standby (Kuntal Ghosh, Michael Paquier, Robert
+Haas)
+</para>
+
+<para>
+Any sanity-check failure generates a fatal error on the standby.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Simon Riggs <simon@2ndQuadrant.com>
+2017-04-05 [00b6b6feb] Allow \-\-with-wal-segsize=n up to n=1024MB
+-->
+<para>
+Increase the maximum configurable <acronym>WAL</> size to 1 gigabyte (Beena Emerson)
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect5>
+
+ </sect4>
+
+ </sect3>
+
+ <sect3>
+ <title>Replication and Recovery</title>
+
+ <itemizedlist>
+
+<listitem>
+<!--
+Author: Peter Eisentraut <peter_e@gmx.net>
+2017-01-20 [665d1fad9] Logical replication
+Author: Peter Eisentraut <peter_e@gmx.net>
+2017-03-23 [7c4f52409] Logical replication support for initial data copy
+Author: Fujii Masao <fujii@postgresql.org>
+2017-04-12 [ff7bce174] Add max_sync_workers_per_subscription to postgresql.conf
+-->
+<para>
+Add the ability to <link linkend="logical-replication">logically replicate</> tables to standby servers (Petr
+Jelinek)
+</para>
+
+<para>
+This allows more fine-grained replication options, including replication
+between different major versions of Postgres and selective-table
+replication.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Fujii Masao <fujii@postgresql.org>
+2016-12-19 [3901fd70c] Support quorum-based synchronous replication.
+-->
+<para>
+Allow waiting for commit acknowledgement from standby servers
+irrespective of the order they appear in <xref linkend="guc-synchronous-standby-names">
+(Masahiko Sawada)
+</para>
+
+<para>
+Previously the server always waited for the active standbys that
+appeared first in <varname>synchronous_standby_names</>. The new
+<varname>synchronous_standby_names</> keyword <literal>ANY</> allows waiting for any number of
+standbys irrespective of their ordering. This is known as quorum commit.
+
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Magnus Hagander <magnus@hagander.net>
+2017-01-14 [f6d6d2920] Change default values for backup and replication paramet
+-->
+<para>
+Reduce configuration necessary to perform streaming backup and
+replication (Magnus Hagander)
+</para>
+
+<para>
+Specifically, defaults were changed for <xref linkend="guc-wal-level">,
+<xref linkend="guc-max-wal-senders">, and
+<xref linkend="guc-max-replication-slots">.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Peter Eisentraut <peter_e@gmx.net>
+2017-03-09 [be37c2120] Enable replication connections by default in <filename>pg_hba.conf</>
+-->
+<para>
+Enable replication from localhost connections by default in <link linkend="auth-pg-hba-conf"><filename>pg_hba.conf</></>
+(Michael Paquier)
+</para>
+
+<para>
+Previously <filename>pg_hba.conf</>'s replication connection lines were commented
+out. This is particularly useful for <application><xref linkend="app-pgbasebackup"></>.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Simon Riggs <simon@2ndQuadrant.com>
+2017-03-23 [6912acc04] Replication lag tracking for walsenders
+-->
+<para>
+Add columns to <link linkend="monitoring-stats-views-table"><structname>pg_stat_replication</></> to report replication delay times
+(Thomas Munro)
+</para>
+
+<para>
+The new columns are <structfield>write_lag</>, <structfield>flush_lag</>, and <structfield>replay_lag</>.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Simon Riggs <simon@2ndQuadrant.com>
+2016-09-03 [35250b6ad] New recovery target recovery_target_lsn
+-->
+<para>
+Add specification of a Log Sequence Number (<acronym>LSN</>) stopping point in
+<link linkend="recovery-config"><filename>recovery.conf</></> (Michael Paquier)
+</para>
+
+<para>
+Previously only specification of the stop name, time, and xid were
+supported.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Stephen Frost <sfrost@snowman.net>
+2017-03-22 [017e4f258] Expose waitforarchive option through pg_stop_backup()
+-->
+<para>
+Allow users to disable <link linkend="functions-admin"><function>pg_stop_backup()</></>'s waiting for all <acronym>WAL</> to be
+archived (David Steele)
+</para>
+
+<para>
+An optional second argument to <function>pg_stop_backup()</> controls that behavior.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Peter Eisentraut <peter_e@gmx.net>
+2016-12-12 [a924c327e] Add support for temporary replication slots
+-->
+<para>
+Allow creation of <link linkend="functions-replication-table">temporary replication slots</> (Petr Jelinek)
+</para>
+
+<para>
+Temporary slots are automatically removed on session exit or error.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Simon Riggs <simon@2ndQuadrant.com>
+2017-03-22 [9b013dc23] Improve performance of replay of AccessExclusiveLocks
+-->
+<para>
+Improve performance of hot standby replay with better tracking of
+Access Exclusive locks (Simon Riggs, David Rowley)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Simon Riggs <simon@2ndQuadrant.com>
+2017-04-04 [728bd991c] Speedup 2PC recovery by skipping two phase state files i
+-->
+<para>
+Speed up two-phase commit recovery performance (Simon Riggs)
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect3>
+
+ <sect3>
+ <title>Queries</title>
+
+ <itemizedlist>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2016-11-22 [906bfcad7] Improve handling of "UPDATE ... SET (column_list) = row_
+-->
+<para>
+Allow <literal>ROW</> to supply values to <command>UPDATE ... SET (column_list)</> (Tom Lane)
+</para>
+
+<para>
+Also allow row values to be supplied by table.*.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2016-09-05 [c54159d44] Make locale-dependent regex character classes work for l
+-->
+<para>
+Fix regular expression locale class handling for bytes greater than <literal>U+7FF</>
+(Tom Lane)
+</para>
+
+<para>
+Previously such classes were not recognized.
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect3>
+
+ <sect3>
+ <title>Utility Commands</title>
+
+ <itemizedlist>
+
+<listitem>
+<!--
+Author: Robert Haas <rhaas@postgresql.org>
+2016-12-07 [f0e44751d] Implement table partitioning.
+-->
+<para>
+Add table <link linkend="SQL-CREATETABLE-PARTITION">partitioning syntax</> that automatically creates partition
+constraints and <command>INSERT</> routing (Amit Langote)
+</para>
+
+<para>
+The syntax supports range and list partitioning.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Kevin Grittner <kgrittn@postgresql.org>
+2016-11-04 [8c48375e5] Implement syntax for transition tables in AFTER triggers
+Author: Kevin Grittner <kgrittn@postgresql.org>
+2017-04-04 [5ebeb579b] Follow-on cleanup for the transition table patch.
+-->
+<para>
+Add <link linkend="SQL-CREATETRIGGER"><literal>AFTER</> trigger</> transition table to record changed rows (Kevin Grittner)
+</para>
+
+<para>
+Transition table contents are accessible from server-side languages.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Stephen Frost <sfrost@snowman.net>
+2016-12-05 [093129c9d] Add support for restrictive RLS policies
+-->
+<para>
+Allow <link linkend="SQL-CREATEPOLICY">restrictive row-level security policies</> (Stephen Frost)
+</para>
+
+<para>
+Previously all security policies were permissive, meaning that any
+matching policy allowed access. Optional restrictive policies must
+match for access to be granted. These policy types can be combined.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Teodor Sigaev <teodor@sigaev.ru>
+2017-03-28 [ab89e465c] Altering default privileges on schemas
+-->
+<para>
+Allow <link linkend="SQL-ALTERDEFAULTPRIVILEGES">default permissions</> on schemas (Matheus Oliveira)
+</para>
+
+<para>
+This is done using the <literal>ALTER DEFAULT PRIVILEGES</> command.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Peter Eisentraut <peter_e@gmx.net>
+2017-02-10 [2ea5b06c7] Add CREATE SEQUENCE AS <data type> clause
+-->
+<para>
+Add <link linkend="SQL-CREATESEQUENCE"><command>CREATE SEQUENCE AS</></> command to create a sequence matching
+an integer data type (Peter Eisentraut)
+</para>
+
+<para>
+This simplifies the creation of sequences matching the range of base
+columns.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2016-11-10 [279c439c7] Support "COPY view FROM" for views with INSTEAD OF INSER
+-->
+<para>
+Allow <command>COPY view FROM</> on views with <literal>INSTEAD INSERT</> triggers (Haribabu
+Kommi)
+</para>
+
+<para>
+The triggers are fed the rows from <command>COPY</>.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Peter Eisentraut <peter_e@gmx.net>
+2017-03-14 [aefeb6874] Allow referring to functions without arguments when uniq
+-->
+<para>
+Allow the specification of a function name without arguments in <acronym>DDL</>
+commands, when unique (Peter Eisentraut)
+</para>
+
+<para>
+For example, allow <link linkend="SQL-DROPFUNCTION"><command>DROP FUNCTION</></> on a function name without arguments if
+there is only one function with that name. This is required by the <acronym>SQL</>
+standard.
+</para>
+</listitem>
+
+<listitem>
+<!--<listitem>
+Author: Peter Eisentraut <peter_e@gmx.net>
+2017-03-06 [583f6c414] Allow dropping multiple functions at once
+Author: Peter Eisentraut <peter_e@gmx.net>
+2017-03-14 [aefeb6874] Allow referring to functions without arguments when uniq-->
+<para>
+Allow multiple functions, operators, and aggregates to be dropped with a
+single <command>DROP</> command (Peter Eisentraut)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Andrew Dunstan <andrew@dunslane.net>
+2017-03-20 [b6fb534f1] Add IF NOT EXISTS for CREATE SERVER and CREATE USER MAPP
+-->
+<para>
+Add <literal>IF NOT EXISTS</> for <link linkend="SQL-CREATESERVER"><command>CREATE SERVER</></> and
+<link linkend="SQL-CREATEUSERMAPPING"><command>CREATE USER MAPPING</></> (Anastasia
+Lubennikova)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Peter Eisentraut <peter_e@gmx.net>
+2017-02-15 [6d16ecc64] Add CREATE COLLATION IF NOT EXISTS clause
+-->
+<para>
+Add <literal>IF NOT EXISTS</> clause to <link linkend="SQL-CREATECOLLATION"><command>CREATE COLLATION</></> (Peter Eisentraut)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Fujii Masao <fujii@postgresql.org>
+2017-03-25 [70adf2fbe] Make VACUUM VERBOSE report the number of skipped frozen
+-->
+<para>
+Have <link linkend="SQL-VACUUM"><command>VACUUM VERBOSE</></> report the number of skipped frozen pages (Masahiko
+Sawada)
+</para>
+
+<para>
+This information is also included in <xref linkend="guc-log-autovacuum-min-duration"> output.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2017-01-16 [d43a619c6] Fix check_srf_call_placement() to handle VALUES cases co
+-->
+<para>
+Fix <function>check_srf_call_placement()</> to handle <command>VALUES</> cases correctly (Tom
+Lane)
+</para>
+
+<para>
+NEED TEXT.
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect3>
+
+ <sect3>
+ <title>Data Types</title>
+
+ <itemizedlist>
+
+<listitem>
+<!--
+Author: Stephen Frost <sfrost@snowman.net>
+2017-03-15 [c7a9fa399] Add support for EUI-64 MAC addresses as macaddr8
+-->
+<para>
+Add support for <acronym>EUI-64</> <acronym>MAC</> addresses as <link linkend="datatype-macaddr8"><type>MACADDR8</></> (Haribabu Kommi)
+</para>
+
+<para>
+This complements support for <acronym>EUI-48</> <acronym>MAC</> addresses as <type>macaddr</>.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Peter Eisentraut <peter_e@gmx.net>
+2017-04-06 [321732705] Identity columns
+-->
+<para>
+Add <link linkend="SQL-CREATETABLE">identity columns</> for assigning a numeric value to columns on insert
+(Peter Eisentraut)
+</para>
+
+<para>
+These are similar to <type>SERIAL</> columns, but are <acronym>SQL</> standard compliant.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2016-09-07 [0ab9c56d0] Support renaming an existing value of an enum type.
+-->
+<para>
+Allow <link linkend="datatype-enum"><type>ENUM</></> values to be renamed (Dagfinn Ilmari Mannsåker)
+</para>
+
+<para>
+This uses the syntax <link linkend="SQL-ALTERTABLE"><command>ALTER TYPE ... RENAME VALUE</></>.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Andrew Dunstan <andrew@dunslane.net>
+2017-02-22 [502a3832c] Correctly handle array pseudotypes in to_json and to_jso
+-->
+<para>
+Properly treat array pseudotypes (<type>anyarray</>) as arrays in <link linkend="functions-json-creation-table"><function>to_json()</></> and <function>to_jsonb()</> (Andrew
+Dunstan)
+</para>
+
+<para>
+Previously "anyarray" values were converted to <type>JSON</> strings.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Peter Eisentraut <peter_e@gmx.net>
+2017-01-17 [323b96aa3] Register missing money operators in system catalogs
+-->
+<para>
+Add <link linkend="datatype-money"><type>MONEY</></> operators for multiplication and division with <type>INT8</> values
+(Peter Eisentraut)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Peter Eisentraut <peter_e@gmx.net>
+2016-09-14 [656df624c] Add overflow checks to money type input function
+-->
+<para>
+More strictly check the <type>MONEY</> type for overflow operations (Peter
+Eisentraut)
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect3>
+
+ <sect3>
+ <title>Functions</title>
+
+ <itemizedlist>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2016-08-17 [cf9b0fea5] Implement regexp_match(), a simplified alternative to re
+-->
+<para>
+Add simplified <link linkend="functions-posix-regexp"><function>regexp_match()</></> function (Emre Hasegeli)
+</para>
+
+<para>
+Similar to <function>regexp_matches()</>, but only returns results from the first
+match so it is easier use for simple cases.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Alvaro Herrera <alvherre@alvh.no-ip.org>
+2017-03-08 [fcec6caaf] Support XMLTABLE query expression
+-->
+<para>
+Add support for converting <type>XML</>-formatted data into a row set (Pavel
+Stehule, Álvaro Herrera)
+</para>
+
+<para>
+This is done by referencing the new <link linkend="functions-xml-processing-xmltable"><function>XMLTABLE</></> function.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Magnus Hagander <magnus@hagander.net>
+2017-01-18 [d00ca333c] Implement array version of jsonb_delete and operator
+-->
+<para>
+Add version of jsonb's <link linkend="functions-jsonb-op-table">delete operator</> that takes an array of keys to delete
+(Magnus Hagander)
+</para>
+
+<para>
+The <type>JSONB</> delete operator also now supports arrays.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Andrew Dunstan <andrew@dunslane.net>
+2017-04-06 [cf35346e8] Make json_populate_record and friends operate recursivel
+-->
+<para>
+Improve <link linkend="functions-json-processing-table"><function>json_populate_record</></> and friends operate recursively (Nikita
+Glukhov)
+</para>
+
+<para>
+CLARIFY
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Robert Haas <rhaas@postgresql.org>
+2016-08-23 [86f31695f] Add txid_current_ifassigned().
+-->
+<para>
+Add function <link linkend="functions-txid-snapshot"><function>txid_current_ifassigned()</></> to return <literal>NULL</> if no transaction
+id has been assigned (Craig Ringer)
+</para>
+
+<para>
+This is different from <link linkend="functions-txid-snapshot"><function>txid_current()</></>, which always returns a
+transaction id by assigning one if necessary. This can be also run on
+standby servers.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Robert Haas <rhaas@postgresql.org>
+2017-03-24 [857ee8e39] Add a txid_status function.
+-->
+<para>
+Add function <link linkend="functions-txid-snapshot"><function>txid_status()</></> to check if a transaction was committed
+(Craig Ringer)
+</para>
+
+<para>
+This is useful for checking after an abrupt disconnection if your
+previous transaction committed and you just didn't receive the
+acknowledgement.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Alvaro Herrera <alvherre@alvh.no-ip.org>
+2017-01-19 [30bcebbdc] Allow negative years in make_date to represent BC years
+-->
+<para>
+Allow <link linkend="functions-formatting-table"><function>make_date()</></> to interpret negative years as <acronym>BC</> years (Álvaro
+Herrera)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2016-09-28 [d3cd36a13] Make to_timestamp() and to_date() range-check fields of
+-->
+<para>
+Have <function>to_timestamp()</> and <function>to_date()</> check check input values for validity
+(Artur Zakirov)
+</para>
+
+<para>
+Previously <function>to_date('2009-06-40','YYYY-MM-DD')</> was accepted and returned
+'2009-07-10'. It will now generate an error.
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect3>
+
+ <sect3>
+ <title>Server-Side Languages</title>
+
+ <itemizedlist>
+
+<listitem>
+<!--
+Author: Peter Eisentraut <peter_e@gmx.net>
+2017-03-27 [70ec3f1f8] PL/Python: Add cursor and execute methods to plan object
+-->
+<para>
+Allow the PL/Python plan object to call cursor and execute methods
+(Peter Eisentraut)
+</para>
+
+<para>
+This is a more object oriented style.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2016-12-13 [55caaaeba] Improve handling of array elements as getdiag_targets an
+-->
+<para>
+Allow PL/pgSQL's <command>GET DIAGNOSTICS</> to retrieve values into array elements
+(Tom Lane)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2016-11-08 [1833f1a1c] Simplify code by getting rid of SPI_push, SPI_pop, SPI_r
+
+-->
+<para>
+Remove <acronym>SPI</> functions <function>SPI_push()</>, <function>SPI_pop()</>, <function>SPI_restore_connection()</> as
+unnecessary (Tom Lane)
+</para>
+
+<para>
+Their functionality now happens automatically. Also, <function>SPI_palloc()</> now
+requires an active connection.
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ <sect4>
+ <title><link linkend="pltcl">PL/Tcl</></title>
+
+ <itemizedlist>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2016-11-06 [26abb50c4] Support PL/Tcl functions that return composite types and
+-->
+<para>
+Allow PL/Tcl functions to return composite types and sets (Jim Nasby)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2017-03-11 [b58fd4a9c] Add a "subtransaction" command to PL/Tcl.
+-->
+<para>
+Add a subtransaction command to PL/Tcl (Victor Wagner)
+</para>
+
+<para>
+This allows PL/Tcl queries to fail without aborting the entire function.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2017-03-07 [0d2b1f305] Invent start_proc parameters for PL/Tcl.
+-->
+<para>
+Add <acronym>GUC</>s to allow initialization routines to be called on PL/Tcl startup
+(Tom Lane)
+</para>
+
+<para>
+The <acronym>GUC</>s are <varname>pltcl.start_proc</> and <varname>pltclu.start_proc</>.
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect4>
+
+ </sect3>
+
+ <sect3>
+ <title>Client Interfaces</title>
+
+ <itemizedlist>
+
+<listitem>
+<!--
+Author: Robert Haas <rhaas@postgresql.org>
+2016-11-03 [274bb2b38] libpq: Allow connection strings and <acronym>URI</>s to specify mult
+-->
+<para>
+Allow libpq to connect to <link linkend="libpq-connect-host">multiple specified</> host names (Robert Haas)
+</para>
+
+<para>
+libpq will connect with the first responsive host name.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Robert Haas <rhaas@postgresql.org>
+2016-11-29 [721f7bd3c] libpq: Add target_session_attrs parameter.
+-->
+<para>
+Allow the libpq connection string to request a <link linkend="libpq-connect-target-session-attrs">read/write host</> (Victor
+Wagner, Mithun Cy)
+</para>
+
+<para>
+This is useful when multiple libpq host names are specified, and is
+controlled by libpq connection parameter <option>target_session_attrs</>.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2017-01-24 [ba005f193] Allow password file name to be specified as a libpq conn
+-->
+<para>
+Allow <link linkend="libpq-connect-passfile">password file name</> to be specified as a libpq connection parameter
+(Julian Markwort)
+</para>
+
+<para>
+Previously this could only be specified via an environment variable.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2016-08-16 [a7b5573d6] Remove separate version numbering for ecpg preprocessor.
+-->
+<para>
+ecpg preprocessor version changed from 4.12 to 10 (Tom Lane)
+</para>
+
+<para>
+The ecpg version now matches the Postgres distribution version number.
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect3>
+
+ <sect3>
+ <title>Client Applications</title>
+
+ <sect4>
+ <title><xref linkend="APP-PSQL"></title>
+
+ <itemizedlist>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2017-03-30 [e984ef586] Support \if ... \elif ... \else ... \endif in psql scrip
+-->
+<para>
+Add conditional branch support to <application>psql</> (Corey Huinker)
+</para>
+
+<para>
+The new syntax uses \if, \elif, \else, and \endif. This is particularly
+helpful for scripting.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Stephen Frost <sfrost@snowman.net>
+2017-03-07 [b2678efd4] psql: Add \gx command
+-->
+<para>
+Add <application>psql</> \gx command to perform \g(execute) in expanded mode (\x)
+(Christoph Berg)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Peter Eisentraut <peter_e@gmx.net>
+2016-11-03 [a0f357e57] psql: Split up "Modifiers" column in \d and \dD
+-->
+<para>
+Improve <application>psql</>'s \d (relation) and \dD (domain) commands to specify
+collation, nullable, and default in separate columns (Peter Eisentraut)
+</para>
+
+<para>
+Previous they were in a single "Modifiers" column.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2017-04-01 [f833c847b] Allow psql variable substitution to occur in backtick co
+-->
+<para>
+Expand <application>psql</> colon variables when used in backtick-executed contexts (Tom Lane)
+</para>
+
+<para>
+This is particularly useful for the new <application>psql</> conditional branch support
+commands.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2017-01-30 [511ae628f] Make psql reject attempts to set special variables to in
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2017-02-01 [86322dc7e] Improve psql's behavior for \set and \unset of its contr
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2017-02-02 [fd6cd6980] Clean up psql's behavior for a few more control variable
+-->
+<para>
+Prevent <application>psql</> special variables from being set to invalid values (Daniel
+Vérité, Tom Lane)
+</para>
+
+<para>
+Previously setting <application>psql</> special variables to invalid values produced the
+default behavior. \set and \unset of special variables now sets them to
+"on" and its default value, rather than a zero-length string and
+undefined. Also have \set always display values for <literal>FETCH_COUNT</>,
+<literal>HISTSIZE</>, and <literal>IGNOREEOF</>.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2017-04-02 [5dbc5da11] Fix behavior of psql's \p to agree with \g, \w, etc.
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2017-04-02 [68dba97a4] Document psql's behavior of recalling the previously exe
+-->
+<para>
+Fix <application>psql</> \p to always print what would be executed by \g or \w (Daniel
+Vérité)
+</para>
+
+<para>
+Previously \p didn't properly print the reverted-to command after a
+buffer contents reset. CLARIFY?
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2016-08-18 [49917dbd7] Improve psql's tab completion for ALTER EXTENSION foo UP
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2016-08-18 [8019b5a89] Improve psql's tab completion for \l.
+Author: Kevin Grittner <kgrittn@postgresql.org>
+2016-09-01 [76f9dd4fa] Improve tab completion for BEGIN & START|SET TRANSACTION
+Author: Kevin Grittner <kgrittn@postgresql.org>
+2016-09-11 [52803098a] psql tab completion for CREATE DATABASE ... TEMPLATE ...
+Author: Kevin Grittner <kgrittn@postgresql.org>
+2016-09-12 [63c1a8719] Fix recent commit for tab-completion of database templat
+Author: Robert Haas <rhaas@postgresql.org>
+2016-11-03 [1d15d0db5] psql: Tab-complete LOCK [TABLE] ... IN {ACCESS|ROW|SHARE
+Author: Kevin Grittner <kgrittn@postgresql.org>
+2016-11-04 [927d7bb6b] Improve tab completion for CREATE TRIGGER.
+Author: Robert Haas <rhaas@postgresql.org>
+2016-11-08 [577f0bdd2] psql: Tab completion for renaming enum values.
+Author: Peter Eisentraut <peter_e@gmx.net>
+2017-03-01 [b5a388392] psql: Add tab completion for DEALLOCATE
+Author: Peter Eisentraut <peter_e@gmx.net>
+2017-03-16 [d7d77f382] psql: Add completion for \help DROP|ALTER
+-->
+<para>
+Improve <application>psql</>'s tab completion (Jeff Janes, Ian Barwick, Andreas Karlsson,
+Sehrope Sarkuni, Thomas Munro, Kevin Grittner, Dagfinn Ilmari Mannsåker)
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect4>
+
+ <sect4>
+ <title><xref linkend="pgbench"></title>
+
+ <itemizedlist>
+
+<listitem>
+<!--
+Author: Robert Haas <rhaas@postgresql.org>
+2016-11-09 [41124a91e] pgbench: Allow the transaction log file prefix to be cha
+-->
+<para>
+Add pgbench option <option>--log-prefix</> to control the log file prefix (Masahiko
+Sawada)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2017-01-20 [cdc2a7047] Allow backslash line continuations in pgbench's meta com
+-->
+<para>
+Allow pgbench's meta commands to span multiple lines via a
+line-terminating backslash (Fabien Coelho)
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect4>
+
+ </sect3>
+
+ <sect3>
+ <title>Server Applications</title>
+
+ <itemizedlist>
+
+<listitem>
+<!--
+Author: Magnus Hagander <magnus@hagander.net>
+2017-01-17 [cada1af31] Add compression support to pg_receivexlog
+-->
+<para>
+Add <link linkend="app-pgreceivewal"><application>pg_receivewal</></> option <option>-Z</>/<option>--compress</> to support compression (Michael
+Paquier)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Simon Riggs <simon@2ndQuadrant.com>
+2017-01-04 [7c030783a] Add pg_recvlogical \-\-endpos=LSN
+-->
+<para>
+Add <link linkend="app-pgrecvlogical"><application>pg_recvlogical</></> option (<option>--endpos</>) to specify the ending position
+(Craig Ringer)
+</para>
+
+<para>
+This complements the existing <option>--startpos</> option.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Peter Eisentraut <peter_e@gmx.net>
+2016-10-19 [5d58c07a4] initdb pg_basebackup: Rename \-\-noxxx options to \-\-no-xxx
+-->
+<para>
+Rename <link linkend="APP-INITDB"><application>initdb</></> options <option>--noclean</> and <option>--nosync</> to be spelled <option>--no-clean</>
+and <option>--no-sync</> (Vik Fearing, Peter Eisentraut)
+</para>
+
+<para>
+The old spellings are still supported.
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ <sect4>
+ <title><link linkend="APP-PGDUMP"><application>pg_dump</></>, <link linkend="APP-PG-DUMPALL"><application>pg_dumpall</></>.
+ <link linkend="APP-PGRESTORE"><application>pg_restore</></></title>
+
+ <itemizedlist>
+
+<listitem>
+<!--
+Author: Peter Eisentraut <peter_e@gmx.net>
+2016-09-20 [46b55e7f8] pg_restore: Add -N option to exclude schemas
+-->
+<para>
+Allow <application>pg_restore</> to exclude schemas (Michael Banck)
+</para>
+
+<para>
+This added a new <option>-N</>/<option>--exclude-schema</> option.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Stephen Frost <sfrost@snowman.net>
+2016-11-29 [4fafa579b] Add \-\-no-blobs option to pg_dump
+-->
+<para>
+Add <application>pg_dump</> <option>--no-blobs</> option to
+<application>pg_dump</> (Guillaume Lelarge)
+</para>
+
+<para>
+This suppresses the dumping of large objects.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Simon Riggs <simon@2ndQuadrant.com>
+2017-03-07 [9a83d56b3] Allow pg_dumpall to dump roles w/o user passwords
+-->
+<para>
+Add <application>pg_dumpall</> option <option>--no-role-passwords</> to dump roles without user
+passwords (Robins Tharakan, Simon Riggs)
+</para>
+
+<para>
+This allows easier dumping for less-privileged users.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Andrew Dunstan <andrew@dunslane.net>
+2017-03-22 [96a7128b7] Sync pg_dump and pg_dumpall output
+-->
+<para>
+Issue fsync on the output files generated by <application>pg_dump</> and <application>pg_dumpall</>(Michael Paquier)
+</para>
+
+<para>
+This can be disabled with the <option>--no-sync</> option.
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect4>
+
+ <sect4>
+
+ <title><xref linkend="app-pgbasebackup"></title>
+
+ <itemizedlist>
+
+<listitem>
+<!--
+Author: Magnus Hagander <magnus@hagander.net>
+2016-10-23 [56c7d8d45] Allow pg_basebackup to stream transaction log in tar mod
+Author: Fujii Masao <fujii@postgresql.org>
+2016-12-21 [ecbdc4c55] Forbid invalid combination of options in pg_basebackup.
+-->
+<para>
+Allow <application>pg_basebackup</> to stream transaction log in tar mode (Magnus
+Hagander)
+</para>
+
+<para>
+The <acronym>WAL</> will be stored in a separate tar file from the base backup.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Magnus Hagander <magnus@hagander.net>
+2017-01-16 [e7b020f78] Make pg_basebackup use temporary replication slots
+-->
+<para>
+Make <application>pg_basebackup</> use temporary replication slots (Magnus Hagander)
+</para>
+
+<para>
+Temporary replication slots will be used by default when <application>pg_basebackup</>
+uses wal streaming with default options.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Peter Eisentraut <peter_e@gmx.net>
+2016-09-29 [bc34223bc] pg_basebackup pg_receivexlog: Issue fsync more carefully
+Author: Peter Eisentraut <peter_e@gmx.net>
+2016-09-29 [6ed2d8584] pg_basebackup: Add - option-->
+<para>
+Improve fsync handling of <application>pg_basebackup</> and <application>pg_receivewal</> (Michael Paquier)
+</para>
+
+<para>
+Also add <option>-nosync</> option to disable fsync.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Peter Eisentraut <peter_e@gmx.net>
+2016-09-28 [6ad8ac602] Exclude additional directories in pg_basebackup
+-->
+<para>
+Improve <application>pg_basebackup</>'s handling of which directories to skip (David
+Steele)
+</para>
+
+<para>
+Also improve the documentation of skipped directories.
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect4>
+
+ <sect4>
+ <title><application><xref linkend="app-pg-ctl"></></title>
+
+ <itemizedlist>
+
+<listitem>
+<!--
+Author: Peter Eisentraut <peter_e@gmx.net>
+2016-09-21 [e7010ce47] pg_ctl: Add wait option to promote action
+-->
+<para>
+Add wait option for <application><xref linkend="app-pg-ctl"></>'s promote operation (Peter Eisentraut)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Peter Eisentraut <peter_e@gmx.net>
+2016-10-19 [0be22457d] pg_ctl: Add long options for -w and -W
+-->
+<para>
+Add log options for <application>pg_ctl</> wait (<option>--wait</>) and no-wait (<option>--no-wait</>) (Vik Fearing)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Peter Eisentraut <peter_e@gmx.net>
+2016-10-19 [caf936b09] pg_ctl: Add long option for -o
+-->
+<para>
+Add long options flag for <application>pg_ctl</> <literal>options</> (Peter Eisentraut)
+</para>
+
+<para>
+It is called <option>--options</>.
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect4>
+
+ </sect3>
+
+ <sect3>
+ <title>Source Code</title>
+
+ <itemizedlist>
+
+<listitem>
+<!--
+Author: Peter Eisentraut <peter_e@gmx.net>
+2017-03-23 [eccfef81e] ICU support
+-->
+<para>
+Allow the <link linkend="configure"><acronym>ICU</></> library to optionally be used for collation support (Peter
+Eisentraut)
+</para>
+
+<para>
+The <acronym>ICU</> library has versioning that allows detection of collation
+changes between versions. It is enabled via configure option
+<option>--with-icu</>. The default still uses the operating system's native
+collation library.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2016-08-15 [ca9112a42] Stamp HEAD as 10devel.
+-->
+<para>
+New major version numbering (Peter Eisentraut, Tom Lane)
+</para>
+
+<para>
+Major versions will now increase just the first number, and minor
+releases will increase just the second number. A third number will no
+longer be used in Postgres version numbers.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2016-11-04 [c8ead2a39] Provide DLLEXPORT markers for C functions via PG_FUNCTIO
+-->
+<para>
+Automatically mark all <link linkend="xfunc-c"><function>PG_FUNCTION_INFO_V1</></> functions as <literal>DLLEXPORT</>-ed on
+<systemitem class="osname">Windows</> (Laurenz Albe)
+</para>
+
+<para>
+If third-party code is using <literal>extern</> function declarations, they should
+also add <literal>DLLEXPORT</> markers to those declarations.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Robert Haas <rhaas@postgresql.org>
+2016-12-02 [13e14a78e] Management of free memory pages.
+Author: Robert Haas <rhaas@postgresql.org>
+2016-12-02 [13df76a53] Introduce dynamic shared memory areas.
+Author: Robert Haas <rhaas@postgresql.org>
+2016-12-19 [e13029a5c] Provide a DSA area for all parallel queries.
+-->
+<para>
+Allow shared memory to be dynamically allocated (Thomas Munro, Robert Haas)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Andres Freund <andres@anarazel.de>
+2017-02-27 [58b25e981] Add "Slab" MemoryContext implementation for efficient eq
+-->
+<para>
+Add slab-like memory allocator for efficient fixed-size allocations
+(Tomas Vondra)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2016-10-09 [ecb0d20a9] Use unnamed POSIX semaphores, if available, on Linux and
+-->
+<para>
+Use <acronym>POSIX</> semaphores rather than SysV semaphores on <systemitem
+class="osname">Linux</> and <systemitem class="osname">FreeBSD</>
+(Tom Lane)
+</para>
+</listitem>
+
+<listitem>
+<para>
+This avoids some limits on SysV semaphores usage.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Andres Freund <andres@anarazel.de>
+2017-04-07 [e8fdbd58f] Improve 64bit atomics support.
+-->
+<para>
+Improve support for 64-bit atomics (Andres Freund)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Andres Freund <andres@anarazel.de>
+2017-03-10 [f8f1430ae] Enable 64 bit atomics on ARM64.
+-->
+<para>
+Enable 64-bit atomic operations on <acronym>ARM64</> (Roman Shaposhnik)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2017-01-02 [1d63f7d2d] Use clock_gettime(), if available, in instr_time measure
+-->
+<para>
+Switch to using <function>clock_gettime()</>, if available, for duration measurements
+(Tom Lane)
+</para>
+
+<para>
+<function>gettimeofday()</> is used if <function>clock_gettime()</> is not available.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Heikki Linnakangas <heikki.linnakangas@iki.fi>
+2016-12-05 [fe0a0b599] Replace PostmasterRandom() with a stronger source, secon
+-->
+<para>
+Add more robust random number generators to be used for
+cryptographic secure uses (Magnus Hagander, Michael Paquier, Heikki
+Linnakangas)
+</para>
+
+<para>
+If no strong random number generator can be found, configure will fail
+unless the <link linkend="configure">configure</> <option>--disable-strong-random</> is used. However, with
+this option, pgcrypto functions requiring a strong random number
+generator will be disabled.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Peter Eisentraut <peter_e@gmx.net>
+2016-08-18 [e8306745e] doc: Speed up XSLT builds
+Author: Peter Eisentraut <peter_e@gmx.net>
+2016-08-24 [0e4cc1fc5] doc: Fix XSLT speedup with older upstream stylesheet ver
+-->
+<para>
+Overhaul documentation <link linkend="docguide-toolsets">build process</> (Alexander Lakhin, Alexander Law)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Peter Eisentraut <peter_e@gmx.net>
+2017-04-06 [510074f9f] Remove use of Jade and DSSSL
+-->
+<para>
+Use <acronym>XSLT</> to build the Postgres documentation (Peter Eisentraut)
+</para>
+
+<para>
+Previously <application>Jade</>, <acronym>DSSSL,</> and <application>JadeTex</> were used.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Peter Eisentraut <peter_e@gmx.net>
+2016-11-15 [e36ddab11] Build HTML documentation using XSLT stylesheets by defau
+-->
+<para>
+Build <acronym>HTML</> documentation using <acronym>XSLT</> stylesheets by default (Peter
+Eisentraut)
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect3>
+
+ <sect3>
+ <title>Additional Modules</title>
+
+ <itemizedlist>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2016-09-29 [8e91e12bc] Allow contrib/file_fdw to read from a program, like COPY
+-->
+<para>
+Allow <link linkend="file-fdw"><application>file_fdw</></> to read from program output as well as files (Corey Huinker, Adam Gomaa)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Robert Haas <rhaas@postgresql.org>
+2016-10-21 [7012b132d] postgres_fdw: Push down aggregates to remote servers.
+-->
+<para>
+Push aggregates to foreign data wrapper servers, where possible (Jeevan
+Chalke, Ashutosh Bapat)
+</para>
+
+<para>
+This reduces the amount of data that must be passed from the foreign
+data wrapper server, and offloads aggregate computation from the
+requesting server. The <link linkend="postgres-fdw"><application>postgres_fdw</></> is able to perform this
+optimization.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Heikki Linnakangas <heikki.linnakangas@iki.fi>
+2016-08-26 [ae025a159] Support OID system column in postgres_fdw.
+-->
+<para>
+Properly support <type>OID</> columns in <application>postgres_fdw</> tables (Etsuro Fujita)
+</para>
+
+<para>
+Previously <type>OID</> columns always returned zeros.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Andrew Dunstan <andrew@dunslane.net>
+2017-03-21 [f7946a92b] Add btree_gist support for enum types.
+-->
+<para>
+Allow <link linkend="btree-gist"><application>btree_gist</></> and <link linkend="btree-gin"><application>btree_gin</></> to index enum types
+(Andrew Dunstan)
+</para>
+
+<para>
+This allows enums to be used in exclusion constraints.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2016-11-29 [11da83a0e] Add uuid to the set of types supported by contrib/btree_
+-->
+<para>
+Add indexing support to <application>btree_gist</> for the <type>UUID</> data type (Paul
+Jungwirth)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Andres Freund <andres@anarazel.de>
+2017-03-09 [3717dc149] Add amcheck extension to contrib.
+-->
+<para>
+Add <link linkend="amcheck"><application>amcheck</></> which can check the validity of btree indexes (Peter
+Geoghegan)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2017-03-27 [a6f22e835] Show ignored constants as "$N" rather than "?" in pg_sta
+-->
+<para>
+Show ignored constants as <literal>$N</> rather than <literal>?</> in
+<link linkend="pgstatstatements"><application>pg_stat_statements</></> (Lukas Fittl)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Tom Lane <tgl@sss.pgh.pa.us>
+2016-09-27 [f31a931fa] Improve contrib/cube's handling of zero-D cubes, infinit
+-->
+<para>
+Improve <link linkend="cube"><application>cube</></>'s handling of zero-dimensional cubes (Tom Lane)
+</para>
+
+<para>
+This also improves handling of <literal>infinite</> and <literal>NaN</> values.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Heikki Linnakangas <heikki.linnakangas@iki.fi>
+2016-09-29 [6e654546f] Don't bother to lock bufmgr partitions in pg_buffercache
+-->
+<para>
+Allow <link linkend="pgbuffercache"><application>pg_buffercache</></> to run without fewer locks (Ivan Kartyshov)
+</para>
+
+<para>
+This allows it be less disruptive when run on production systems.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Robert Haas <rhaas@postgresql.org>
+2017-02-03 [e759854a0] pgstattuple: Add pgstathashindex.
+-->
+<para>
+Add <function>pgstathashindex()</> function to <link linkend="pgstattuple"><application>pgstattuple</></> to view hash index
+statistics (Ashutosh Sharma)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Stephen Frost <sfrost@snowman.net>
+2016-09-29 [fd321a1df] Remove superuser checks in pgstattuple
+-->
+<para>
+Allow <link linkend="pgstattuple"><application>pgstattuple</></> to use <command>GRANT</> permissions (Stephen Frost)
+</para>
+
+<para>
+This allows non-superusers to run these functions if permissions allow.
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Robert Haas <rhaas@postgresql.org>
+2016-10-28 [d4b5d4cad] pgstattuple: Don't take heavyweight locks when examining
+-->
+<para>
+Reduce locking when <link linkend="pgstattuple"><application>pgstattuple</></> examines hash indexes (Amit Kapila)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Peter Eisentraut <peter_e@gmx.net>
+2017-03-17 [fef2bcdcb] pageinspect: Add page_checksum function
+-->
+<para>
+Add <function>page_checksum()</> function to <link linkend="pageinspect"><application>pageinspect</></> (Tomas Vondra)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Robert Haas <rhaas@postgresql.org>
+2017-02-02 [08bf6e529] pageinspect: Support hash indexes.
+-->
+<para>
+Add hash index support to <link linkend="pageinspect"><application>pageinspect</></> (Jesper Pedersen, Ashutosh
+Sharma)
+</para>
+</listitem>
+
+<listitem>
+<!--
+Author: Peter Eisentraut <peter_e@gmx.net>
+2017-04-04 [193f5f9e9] pageinspect: Add bt_page_items function with bytea argum
+-->
+<para>
+Add <link linkend="pageinspect"><application>pageinspect</></> function <function>bt_page_items()</> to print page items
+from a page image (Tomas Vondra)
+</para>
+
+<para>
+Previously only block numbers were supported.
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect3>
+
+ </sect2>
+
+ </sect1>
projects / postgresql / commitdiff