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Release notes for 9.5.4, 9.4.9, 9.3.14, 9.2.18, 9.1.23.

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262
doc/src/sgml/release-9.1.sgml
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<!-- doc/src/sgml/release-9.1.sgml -->
<!-- See header comment in release.sgml about typical markup -->
<sect1 id="release-9-1-23">
<title>Release 9.1.23</title>
<note>
<title>Release Date</title>
<simpara>2016-08-11</simpara>
</note>
<para>
This release contains a variety of fixes from 9.1.22.
For information about new features in the 9.1 major release, see
<xref linkend="release-9-1">.
</para>
<para>
The <productname>PostgreSQL</> community will stop releasing updates
for the 9.1.X release series in September 2016.
Users are encouraged to update to a newer release branch soon.
</para>
<sect2>
<title>Migration to Version 9.1.23</title>
<para>
A dump/restore is not required for those running 9.1.X.
</para>
<para>
However, if you are upgrading from a version earlier than 9.1.16,
see <xref linkend="release-9-1-16">.
</para>
</sect2>
<sect2>
<title>Changes</title>
<itemizedlist>
<listitem>
<para>
Fix corner-case misbehaviors for <literal>IS NULL</>/<literal>IS NOT
NULL</> applied to nested composite values (Andrew Gierth, Tom Lane)
</para>
<para>
The SQL standard specifies that <literal>IS NULL</> should return
TRUE for a row of all null values (thus <literal>ROW(NULL,NULL) IS
NULL</> yields TRUE), but this is not meant to apply recursively
(thus <literal>ROW(NULL, ROW(NULL,NULL)) IS NULL</> yields FALSE).
The core executor got this right, but certain planner optimizations
treated the test as recursive (thus producing TRUE in both cases),
and <filename>contrib/postgres_fdw</> could produce remote queries
that misbehaved similarly.
</para>
</listitem>
<listitem>
<para>
Make the <type>inet</> and <type>cidr</> data types properly reject
IPv6 addresses with too many colon-separated fields (Tom Lane)
</para>
</listitem>
<listitem>
<para>
Prevent crash in <function>close_ps()</>
(the <type>point</> <literal>##</> <type>lseg</> operator)
for NaN input coordinates (Tom Lane)
</para>
<para>
Make it return NULL instead of crashing.
</para>
</listitem>
<listitem>
<para>
Avoid unsafe intermediate state during expensive paths
through <function>heap_update()</> (Masahiko Sawada, Andres Freund)
</para>
<para>
Previously, these cases locked the target tuple (by setting its XMAX)
but did not WAL-log that action, thus risking data integrity problems
if the page were spilled to disk and then a database crash occurred
before the tuple update could be completed.
</para>
</listitem>
<listitem>
<para>
Avoid consuming a transaction ID during <command>VACUUM</>
(Alexander Korotkov)
</para>
<para>
Some cases in <command>VACUUM</> unnecessarily caused an XID to be
assigned to the current transaction. Normally this is negligible,
but if one is up against the XID wraparound limit, consuming more
XIDs during anti-wraparound vacuums is a very bad thing.
</para>
</listitem>
<listitem>
<para>
Avoid canceling hot-standby queries during <command>VACUUM FREEZE</>
(Simon Riggs, &Aacute;lvaro Herrera)
</para>
<para>
<command>VACUUM FREEZE</> on an otherwise-idle master server could
result in unnecessary cancellations of queries on its standby
servers.
</para>
</listitem>
<listitem>
<para>
When a manual <command>ANALYZE</> specifies a column list, don't
reset the table's <literal>changes_since_analyze</> counter
(Tom Lane)
</para>
<para>
If we're only analyzing some columns, we should not prevent routine
auto-analyze from happening for the other columns.
</para>
</listitem>
<listitem>
<para>
Fix <command>ANALYZE</>'s overestimation of <literal>n_distinct</>
for a unique or nearly-unique column with many null entries (Tom
Lane)
</para>
<para>
The nulls could get counted as though they were themselves distinct
values, leading to serious planner misestimates in some types of
queries.
</para>
</listitem>
<listitem>
<para>
Prevent autovacuum from starting multiple workers for the same shared
catalog (&Aacute;lvaro Herrera)
</para>
<para>
Normally this isn't much of a problem because the vacuum doesn't take
long anyway; but in the case of a severely bloated catalog, it could
result in all but one worker uselessly waiting instead of doing
useful work on other tables.
</para>
</listitem>
<listitem>
<para>
Fix <filename>contrib/btree_gin</> to handle the smallest
possible <type>bigint</> value correctly (Peter Eisentraut)
</para>
</listitem>
<listitem>
<para>
Teach libpq to correctly decode server version from future servers
(Peter Eisentraut)
</para>
<para>
It's planned to switch to two-part instead of three-part server
version numbers for releases after 9.6. Make sure
that <function>PQserverVersion()</> returns the correct value for
such cases.
</para>
</listitem>
<listitem>
<para>
Fix <application>ecpg</>'s code for <literal>unsigned long long</>
array elements (Michael Meskes)
</para>
</listitem>
<listitem>
<para>
Make <application>pg_basebackup</> accept <literal>-Z 0</> as
specifying no compression (Fujii Masao)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: REL9_1_STABLE [d56c02f1a] 2016-06-19 13:45:03 -0400
Branch: REL9_1_STABLE [354b3a3ac] 2016-06-19 14:01:17 -0400
-->
<para>
Revert to the old heuristic timeout for <literal>pg_ctl start -w</>
(Tom Lane)
</para>
<para>
The new method adopted as of release 9.1.20 does not work
when <varname>silent_mode</> is enabled, so go back to the old way.
</para>
</listitem>
<listitem>
<para>
Fix makefiles' rule for building AIX shared libraries to be safe for
parallel make (Noah Misch)
</para>
</listitem>
<listitem>
<para>
Fix TAP tests and MSVC scripts to work when build directory's path
name contains spaces (Michael Paquier, Kyotaro Horiguchi)
</para>
</listitem>
<listitem>
<para>
Make regression tests safe for Danish and Welsh locales (Jeff Janes,
Tom Lane)
</para>
<para>
Change some test data that triggered the unusual sorting rules of
these locales.
</para>
</listitem>
<listitem>
<para>
Update our copy of the timezone code to match
IANA's <application>tzcode</> release 2016c (Tom Lane)
</para>
<para>
This is needed to cope with anticipated future changes in the time
zone data files. It also fixes some corner-case bugs in coping with
unusual time zones.
</para>
</listitem>
<listitem>
<para>
Update time zone data files to <application>tzdata</> release 2016f
for DST law changes in Kemerovo and Novosibirsk, plus historical
corrections for Azerbaijan, Belarus, and Morocco.
</para>
</listitem>
</itemizedlist>
</sect2>
</sect1>
<sect1 id="release-9-1-22">
<title>Release 9.1.22</title>

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doc/src/sgml/release-9.2.sgml
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@ -1,6 +1,267 @@
<!-- doc/src/sgml/release-9.2.sgml -->
<!-- See header comment in release.sgml about typical markup -->
<sect1 id="release-9-2-18">
<title>Release 9.2.18</title>
<note>
<title>Release Date</title>
<simpara>2016-08-11</simpara>
</note>
<para>
This release contains a variety of fixes from 9.2.17.
For information about new features in the 9.2 major release, see
<xref linkend="release-9-2">.
</para>
<sect2>
<title>Migration to Version 9.2.18</title>
<para>
A dump/restore is not required for those running 9.2.X.
</para>
<para>
However, if you are upgrading from a version earlier than 9.2.11,
see <xref linkend="release-9-2-11">.
</para>
</sect2>
<sect2>
<title>Changes</title>
<itemizedlist>
<listitem>
<para>
Fix corner-case misbehaviors for <literal>IS NULL</>/<literal>IS NOT
NULL</> applied to nested composite values (Andrew Gierth, Tom Lane)
</para>
<para>
The SQL standard specifies that <literal>IS NULL</> should return
TRUE for a row of all null values (thus <literal>ROW(NULL,NULL) IS
NULL</> yields TRUE), but this is not meant to apply recursively
(thus <literal>ROW(NULL, ROW(NULL,NULL)) IS NULL</> yields FALSE).
The core executor got this right, but certain planner optimizations
treated the test as recursive (thus producing TRUE in both cases),
and <filename>contrib/postgres_fdw</> could produce remote queries
that misbehaved similarly.
</para>
</listitem>
<listitem>
<para>
Make the <type>inet</> and <type>cidr</> data types properly reject
IPv6 addresses with too many colon-separated fields (Tom Lane)
</para>
</listitem>
<listitem>
<para>
Prevent crash in <function>close_ps()</>
(the <type>point</> <literal>##</> <type>lseg</> operator)
for NaN input coordinates (Tom Lane)
</para>
<para>
Make it return NULL instead of crashing.
</para>
</listitem>
<listitem>
<para>
Avoid unsafe intermediate state during expensive paths
through <function>heap_update()</> (Masahiko Sawada, Andres Freund)
</para>
<para>
Previously, these cases locked the target tuple (by setting its XMAX)
but did not WAL-log that action, thus risking data integrity problems
if the page were spilled to disk and then a database crash occurred
before the tuple update could be completed.
</para>
</listitem>
<listitem>
<para>
Avoid crash in <literal>postgres -C</> when the specified variable
has a null string value (Michael Paquier)
</para>
</listitem>
<listitem>
<para>
Avoid consuming a transaction ID during <command>VACUUM</>
(Alexander Korotkov)
</para>
<para>
Some cases in <command>VACUUM</> unnecessarily caused an XID to be
assigned to the current transaction. Normally this is negligible,
but if one is up against the XID wraparound limit, consuming more
XIDs during anti-wraparound vacuums is a very bad thing.
</para>
</listitem>
<listitem>
<para>
Avoid canceling hot-standby queries during <command>VACUUM FREEZE</>
(Simon Riggs, &Aacute;lvaro Herrera)
</para>
<para>
<command>VACUUM FREEZE</> on an otherwise-idle master server could
result in unnecessary cancellations of queries on its standby
servers.
</para>
</listitem>
<listitem>
<para>
When a manual <command>ANALYZE</> specifies a column list, don't
reset the table's <literal>changes_since_analyze</> counter
(Tom Lane)
</para>
<para>
If we're only analyzing some columns, we should not prevent routine
auto-analyze from happening for the other columns.
</para>
</listitem>
<listitem>
<para>
Fix <command>ANALYZE</>'s overestimation of <literal>n_distinct</>
for a unique or nearly-unique column with many null entries (Tom
Lane)
</para>
<para>
The nulls could get counted as though they were themselves distinct
values, leading to serious planner misestimates in some types of
queries.
</para>
</listitem>
<listitem>
<para>
Prevent autovacuum from starting multiple workers for the same shared
catalog (&Aacute;lvaro Herrera)
</para>
<para>
Normally this isn't much of a problem because the vacuum doesn't take
long anyway; but in the case of a severely bloated catalog, it could
result in all but one worker uselessly waiting instead of doing
useful work on other tables.
</para>
</listitem>
<listitem>
<para>
Prevent infinite loop in GiST index build for geometric columns
containing NaN component values (Tom Lane)
</para>
</listitem>
<listitem>
<para>
Fix <filename>contrib/btree_gin</> to handle the smallest
possible <type>bigint</> value correctly (Peter Eisentraut)
</para>
</listitem>
<listitem>
<para>
Teach libpq to correctly decode server version from future servers
(Peter Eisentraut)
</para>
<para>
It's planned to switch to two-part instead of three-part server
version numbers for releases after 9.6. Make sure
that <function>PQserverVersion()</> returns the correct value for
such cases.
</para>
</listitem>
<listitem>
<para>
Fix <application>ecpg</>'s code for <literal>unsigned long long</>
array elements (Michael Meskes)
</para>
</listitem>
<listitem>
<para>
In <application>pg_dump</> with both <option>-c</> and <option>-C</>
options, avoid emitting an unwanted <literal>CREATE SCHEMA public</>
command (David Johnston, Tom Lane)
</para>
</listitem>
<listitem>
<para>
Make <application>pg_basebackup</> accept <literal>-Z 0</> as
specifying no compression (Fujii Masao)
</para>
</listitem>
<listitem>
<para>
Fix makefiles' rule for building AIX shared libraries to be safe for
parallel make (Noah Misch)
</para>
</listitem>
<listitem>
<para>
Fix TAP tests and MSVC scripts to work when build directory's path
name contains spaces (Michael Paquier, Kyotaro Horiguchi)
</para>
</listitem>
<listitem>
<para>
Make regression tests safe for Danish and Welsh locales (Jeff Janes,
Tom Lane)
</para>
<para>
Change some test data that triggered the unusual sorting rules of
these locales.
</para>
</listitem>
<listitem>
<para>
Update our copy of the timezone code to match
IANA's <application>tzcode</> release 2016c (Tom Lane)
</para>
<para>
This is needed to cope with anticipated future changes in the time
zone data files. It also fixes some corner-case bugs in coping with
unusual time zones.
</para>
</listitem>
<listitem>
<para>
Update time zone data files to <application>tzdata</> release 2016f
for DST law changes in Kemerovo and Novosibirsk, plus historical
corrections for Azerbaijan, Belarus, and Morocco.
</para>
</listitem>
</itemizedlist>
</sect2>
</sect1>
<sect1 id="release-9-2-17">
<title>Release 9.2.17</title>

410
doc/src/sgml/release-9.3.sgml
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@ -1,6 +1,416 @@
<!-- doc/src/sgml/release-9.3.sgml -->
<!-- See header comment in release.sgml about typical markup -->
<sect1 id="release-9-3-14">
<title>Release 9.3.14</title>
<note>
<title>Release Date</title>
<simpara>2016-08-11</simpara>
</note>
<para>
This release contains a variety of fixes from 9.3.13.
For information about new features in the 9.3 major release, see
<xref linkend="release-9-3">.
</para>
<sect2>
<title>Migration to Version 9.3.14</title>
<para>
A dump/restore is not required for those running 9.3.X.
</para>
<para>
However, if you are upgrading from a version earlier than 9.3.9,
see <xref linkend="release-9-3-9">.
</para>
</sect2>
<sect2>
<title>Changes</title>
<itemizedlist>
<listitem>
<para>
Fix corner-case misbehaviors for <literal>IS NULL</>/<literal>IS NOT
NULL</> applied to nested composite values (Andrew Gierth, Tom Lane)
</para>
<para>
The SQL standard specifies that <literal>IS NULL</> should return
TRUE for a row of all null values (thus <literal>ROW(NULL,NULL) IS
NULL</> yields TRUE), but this is not meant to apply recursively
(thus <literal>ROW(NULL, ROW(NULL,NULL)) IS NULL</> yields FALSE).
The core executor got this right, but certain planner optimizations
treated the test as recursive (thus producing TRUE in both cases),
and <filename>contrib/postgres_fdw</> could produce remote queries
that misbehaved similarly.
</para>
</listitem>
<listitem>
<para>
Make the <type>inet</> and <type>cidr</> data types properly reject
IPv6 addresses with too many colon-separated fields (Tom Lane)
</para>
</listitem>
<listitem>
<para>
Prevent crash in <function>close_ps()</>
(the <type>point</> <literal>##</> <type>lseg</> operator)
for NaN input coordinates (Tom Lane)
</para>
<para>
Make it return NULL instead of crashing.
</para>
</listitem>
<listitem>
<para>
Avoid possible crash in <function>pg_get_expr()</> when inconsistent
values are passed to it (Michael Paquier, Thomas Munro)
</para>
</listitem>
<listitem>
<para>
Do not run the planner on the query contained in <literal>CREATE
MATERIALIZED VIEW</> or <literal>CREATE TABLE AS</>
when <literal>WITH NO DATA</> is specified (Michael Paquier,
Tom Lane)
</para>
<para>
This avoids some unnecessary failure conditions, for example if a
stable function invoked by the materialized view depends on a table
that doesn't exist yet.
</para>
</listitem>
<listitem>
<para>
Avoid unsafe intermediate state during expensive paths
through <function>heap_update()</> (Masahiko Sawada, Andres Freund)
</para>
<para>
Previously, these cases locked the target tuple (by setting its XMAX)
but did not WAL-log that action, thus risking data integrity problems
if the page were spilled to disk and then a database crash occurred
before the tuple update could be completed.
</para>
</listitem>
<listitem>
<para>
Fix hint bit update during WAL replay of row locking operations
(Andres Freund)
</para>
<para>
The only known consequence of this problem is that row locks held by
a prepared, but uncommitted, transaction might fail to be enforced
after a crash and restart.
</para>
</listitem>
<listitem>
<para>
Avoid unnecessary <quote>could not serialize access</> errors when
acquiring <literal>FOR KEY SHARE</> row locks in serializable mode
(&Aacute;lvaro Herrera)
</para>
</listitem>
<listitem>
<para>
Avoid crash in <literal>postgres -C</> when the specified variable
has a null string value (Michael Paquier)
</para>
</listitem>
<listitem>
<para>
Ensure that backends see up-to-date statistics for shared catalogs
(Tom Lane)
</para>
<para>
The statistics collector failed to update the statistics file for
shared catalogs after a request from a regular backend. This problem
was partially masked because the autovacuum launcher regularly makes
requests that did cause such updates; however, it became obvious with
autovacuum disabled.
</para>
</listitem>
<listitem>
<para>
Avoid redundant writes of the statistics files when multiple
backends request updates close together (Tom Lane, Tomas Vondra)
</para>
</listitem>
<listitem>
<para>
Avoid consuming a transaction ID during <command>VACUUM</>
(Alexander Korotkov)
</para>
<para>
Some cases in <command>VACUUM</> unnecessarily caused an XID to be
assigned to the current transaction. Normally this is negligible,
but if one is up against the XID wraparound limit, consuming more
XIDs during anti-wraparound vacuums is a very bad thing.
</para>
</listitem>
<listitem>
<para>
Avoid canceling hot-standby queries during <command>VACUUM FREEZE</>
(Simon Riggs, &Aacute;lvaro Herrera)
</para>
<para>
<command>VACUUM FREEZE</> on an otherwise-idle master server could
result in unnecessary cancellations of queries on its standby
servers.
</para>
</listitem>
<listitem>
<para>
Prevent possible failure when vacuuming multixact IDs in an
installation that has been pg_upgrade'd from pre-9.3 (Andrew Gierth,
&Aacute;lvaro Herrera)
</para>
<para>
The usual symptom of this bug is errors
like <quote>MultiXactId <replaceable>NNN</> has not been created
yet -- apparent wraparound</quote>.
</para>
</listitem>
<listitem>
<para>
When a manual <command>ANALYZE</> specifies a column list, don't
reset the table's <literal>changes_since_analyze</> counter
(Tom Lane)
</para>
<para>
If we're only analyzing some columns, we should not prevent routine
auto-analyze from happening for the other columns.
</para>
</listitem>
<listitem>
<para>
Fix <command>ANALYZE</>'s overestimation of <literal>n_distinct</>
for a unique or nearly-unique column with many null entries (Tom
Lane)
</para>
<para>
The nulls could get counted as though they were themselves distinct
values, leading to serious planner misestimates in some types of
queries.
</para>
</listitem>
<listitem>
<para>
Prevent autovacuum from starting multiple workers for the same shared
catalog (&Aacute;lvaro Herrera)
</para>
<para>
Normally this isn't much of a problem because the vacuum doesn't take
long anyway; but in the case of a severely bloated catalog, it could
result in all but one worker uselessly waiting instead of doing
useful work on other tables.
</para>
</listitem>
<listitem>
<para>
Prevent infinite loop in GiST index build for geometric columns
containing NaN component values (Tom Lane)
</para>
</listitem>
<listitem>
<para>
Fix <filename>contrib/btree_gin</> to handle the smallest
possible <type>bigint</> value correctly (Peter Eisentraut)
</para>
</listitem>
<listitem>
<para>
Teach libpq to correctly decode server version from future servers
(Peter Eisentraut)
</para>
<para>
It's planned to switch to two-part instead of three-part server
version numbers for releases after 9.6. Make sure
that <function>PQserverVersion()</> returns the correct value for
such cases.
</para>
</listitem>
<listitem>
<para>
Fix <application>ecpg</>'s code for <literal>unsigned long long</>
array elements (Michael Meskes)
</para>
</listitem>
<listitem>
<para>
In <application>pg_dump</> with both <option>-c</> and <option>-C</>
options, avoid emitting an unwanted <literal>CREATE SCHEMA public</>
command (David Johnston, Tom Lane)
</para>
</listitem>
<listitem>
<para>
Improve handling of <systemitem>SIGTERM</>/control-C in
parallel <application>pg_dump</> and <application>pg_restore</> (Tom
Lane)
</para>
<para>
Make sure that the worker processes will exit promptly, and also arrange
to send query-cancel requests to the connected backends, in case they
are doing something long-running such as a <command>CREATE INDEX</>.
</para>
</listitem>
<listitem>
<para>
Fix error reporting in parallel <application>pg_dump</>
and <application>pg_restore</> (Tom Lane)
</para>
<para>
Previously, errors reported by <application>pg_dump</>
or <application>pg_restore</> worker processes might never make it to
the user's console, because the messages went through the master
process, and there were various deadlock scenarios that would prevent
the master process from passing on the messages. Instead, just print
everything to <literal>stderr</>. In some cases this will result in
duplicate messages (for instance, if all the workers report a server
shutdown), but that seems better than no message.
</para>
</listitem>
<listitem>
<para>
Ensure that parallel <application>pg_dump</>
or <application>pg_restore</> on Windows will shut down properly
after an error (Kyotaro Horiguchi)
</para>
<para>
Previously, it would report the error, but then just sit until
manually stopped by the user.
</para>
</listitem>
<listitem>
<para>
Make <application>pg_dump</> behave better when built without zlib
support (Kyotaro Horiguchi)
</para>
<para>
It didn't work right for parallel dumps, and emitted some rather
pointless warnings in other cases.
</para>
</listitem>
<listitem>
<para>
Make <application>pg_basebackup</> accept <literal>-Z 0</> as
specifying no compression (Fujii Masao)
</para>
</listitem>
<listitem>
<para>
Fix makefiles' rule for building AIX shared libraries to be safe for
parallel make (Noah Misch)
</para>
</listitem>
<listitem>
<para>
Fix TAP tests and MSVC scripts to work when build directory's path
name contains spaces (Michael Paquier, Kyotaro Horiguchi)
</para>
</listitem>
<listitem>
<para>
Be more predictable about reporting <quote>statement timeout</>
versus <quote>lock timeout</> (Tom Lane)
</para>
<para>
On heavily loaded machines, the regression tests sometimes failed due
to reporting <quote>lock timeout</> even though the statement timeout
should have occurred first.
</para>
</listitem>
<listitem>
<para>
Make regression tests safe for Danish and Welsh locales (Jeff Janes,
Tom Lane)
</para>
<para>
Change some test data that triggered the unusual sorting rules of
these locales.
</para>
</listitem>
<listitem>
<para>
Update our copy of the timezone code to match
IANA's <application>tzcode</> release 2016c (Tom Lane)
</para>
<para>
This is needed to cope with anticipated future changes in the time
zone data files. It also fixes some corner-case bugs in coping with
unusual time zones.
</para>
</listitem>
<listitem>
<para>
Update time zone data files to <application>tzdata</> release 2016f
for DST law changes in Kemerovo and Novosibirsk, plus historical
corrections for Azerbaijan, Belarus, and Morocco.
</para>
</listitem>
</itemizedlist>
</sect2>
</sect1>
<sect1 id="release-9-3-13">
<title>Release 9.3.13</title>

442
doc/src/sgml/release-9.4.sgml
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@ -1,6 +1,448 @@
<!-- doc/src/sgml/release-9.4.sgml -->
<!-- See header comment in release.sgml about typical markup -->
<sect1 id="release-9-4-9">
<title>Release 9.4.9</title>
<note>
<title>Release Date</title>
<simpara>2016-08-11</simpara>
</note>
<para>
This release contains a variety of fixes from 9.4.8.
For information about new features in the 9.4 major release, see
<xref linkend="release-9-4">.
</para>
<sect2>
<title>Migration to Version 9.4.9</title>
<para>
A dump/restore is not required for those running 9.4.X.
</para>
<para>
However, if you are upgrading from a version earlier than 9.4.6,
see <xref linkend="release-9-4-6">.
</para>
</sect2>
<sect2>
<title>Changes</title>
<itemizedlist>
<listitem>
<para>
Fix corner-case misbehaviors for <literal>IS NULL</>/<literal>IS NOT
NULL</> applied to nested composite values (Andrew Gierth, Tom Lane)
</para>
<para>
The SQL standard specifies that <literal>IS NULL</> should return
TRUE for a row of all null values (thus <literal>ROW(NULL,NULL) IS
NULL</> yields TRUE), but this is not meant to apply recursively
(thus <literal>ROW(NULL, ROW(NULL,NULL)) IS NULL</> yields FALSE).
The core executor got this right, but certain planner optimizations
treated the test as recursive (thus producing TRUE in both cases),
and <filename>contrib/postgres_fdw</> could produce remote queries
that misbehaved similarly.
</para>
</listitem>
<listitem>
<para>
Make the <type>inet</> and <type>cidr</> data types properly reject
IPv6 addresses with too many colon-separated fields (Tom Lane)
</para>
</listitem>
<listitem>
<para>
Prevent crash in <function>close_ps()</>
(the <type>point</> <literal>##</> <type>lseg</> operator)
for NaN input coordinates (Tom Lane)
</para>
<para>
Make it return NULL instead of crashing.
</para>
</listitem>
<listitem>
<para>
Avoid possible crash in <function>pg_get_expr()</> when inconsistent
values are passed to it (Michael Paquier, Thomas Munro)
</para>
</listitem>
<listitem>
<para>
Do not run the planner on the query contained in <literal>CREATE
MATERIALIZED VIEW</> or <literal>CREATE TABLE AS</>
when <literal>WITH NO DATA</> is specified (Michael Paquier,
Tom Lane)
</para>
<para>
This avoids some unnecessary failure conditions, for example if a
stable function invoked by the materialized view depends on a table
that doesn't exist yet.
</para>
</listitem>
<listitem>
<para>
Avoid unsafe intermediate state during expensive paths
through <function>heap_update()</> (Masahiko Sawada, Andres Freund)
</para>
<para>
Previously, these cases locked the target tuple (by setting its XMAX)
but did not WAL-log that action, thus risking data integrity problems
if the page were spilled to disk and then a database crash occurred
before the tuple update could be completed.
</para>
</listitem>
<listitem>
<para>
Fix hint bit update during WAL replay of row locking operations
(Andres Freund)
</para>
<para>
The only known consequence of this problem is that row locks held by
a prepared, but uncommitted, transaction might fail to be enforced
after a crash and restart.
</para>
</listitem>
<listitem>
<para>
Avoid unnecessary <quote>could not serialize access</> errors when
acquiring <literal>FOR KEY SHARE</> row locks in serializable mode
(&Aacute;lvaro Herrera)
</para>
</listitem>
<listitem>
<para>
Avoid crash in <literal>postgres -C</> when the specified variable
has a null string value (Michael Paquier)
</para>
</listitem>
<listitem>
<para>
Fix possible loss of large subtransactions in logical decoding
(Petru-Florin Mihancea)
</para>
</listitem>
<listitem>
<para>
Fix failure of logical decoding when a subtransaction contains no
actual changes (Marko Tiikkaja, Andrew Gierth)
</para>
</listitem>
<listitem>
<para>
Ensure that backends see up-to-date statistics for shared catalogs
(Tom Lane)
</para>
<para>
The statistics collector failed to update the statistics file for
shared catalogs after a request from a regular backend. This problem
was partially masked because the autovacuum launcher regularly makes
requests that did cause such updates; however, it became obvious with
autovacuum disabled.
</para>
</listitem>
<listitem>
<para>
Avoid redundant writes of the statistics files when multiple
backends request updates close together (Tom Lane, Tomas Vondra)
</para>
</listitem>
<listitem>
<para>
Avoid consuming a transaction ID during <command>VACUUM</>
(Alexander Korotkov)
</para>
<para>
Some cases in <command>VACUUM</> unnecessarily caused an XID to be
assigned to the current transaction. Normally this is negligible,
but if one is up against the XID wraparound limit, consuming more
XIDs during anti-wraparound vacuums is a very bad thing.
</para>
</listitem>
<listitem>
<!--
Author: Alvaro Herrera <alvherre@alvh.no-ip.org>
Branch: REL9_4_STABLE [7a0f09da7] 2016-05-25 19:39:49 -0400
Branch: REL9_3_STABLE [6537a48c5] 2016-05-25 19:39:49 -0400
Branch: REL9_2_STABLE [294509ea9] 2016-05-25 19:39:49 -0400
Branch: REL9_1_STABLE [de887cc8a] 2016-05-25 19:39:49 -0400
-->
<para>
Avoid canceling hot-standby queries during <command>VACUUM FREEZE</>
(Simon Riggs, &Aacute;lvaro Herrera)
</para>
<para>
<command>VACUUM FREEZE</> on an otherwise-idle master server could
result in unnecessary cancellations of queries on its standby
servers.
</para>
</listitem>
<listitem>
<para>
Prevent possible failure when vacuuming multixact IDs in an
installation that has been pg_upgrade'd from pre-9.3 (Andrew Gierth,
&Aacute;lvaro Herrera)
</para>
<para>
The usual symptom of this bug is errors
like <quote>MultiXactId <replaceable>NNN</> has not been created
yet -- apparent wraparound</quote>.
</para>
</listitem>
<listitem>
<para>
When a manual <command>ANALYZE</> specifies a column list, don't
reset the table's <literal>changes_since_analyze</> counter
(Tom Lane)
</para>
<para>
If we're only analyzing some columns, we should not prevent routine
auto-analyze from happening for the other columns.
</para>
</listitem>
<listitem>
<para>
Fix <command>ANALYZE</>'s overestimation of <literal>n_distinct</>
for a unique or nearly-unique column with many null entries (Tom
Lane)
</para>
<para>
The nulls could get counted as though they were themselves distinct
values, leading to serious planner misestimates in some types of
queries.
</para>
</listitem>
<listitem>
<para>
Prevent autovacuum from starting multiple workers for the same shared
catalog (&Aacute;lvaro Herrera)
</para>
<para>
Normally this isn't much of a problem because the vacuum doesn't take
long anyway; but in the case of a severely bloated catalog, it could
result in all but one worker uselessly waiting instead of doing
useful work on other tables.
</para>
</listitem>
<listitem>
<para>
Avoid duplicate buffer lock release when abandoning a b-tree index
page deletion attempt (Tom Lane)
</para>
<para>
This mistake prevented <command>VACUUM</> from completing in some
cases involving corrupt b-tree indexes.
</para>
</listitem>
<listitem>
<para>
Prevent infinite loop in GiST index build for geometric columns
containing NaN component values (Tom Lane)
</para>
</listitem>
<listitem>
<para>
Fix <filename>contrib/btree_gin</> to handle the smallest
possible <type>bigint</> value correctly (Peter Eisentraut)
</para>
</listitem>
<listitem>
<para>
Teach libpq to correctly decode server version from future servers
(Peter Eisentraut)
</para>
<para>
It's planned to switch to two-part instead of three-part server
version numbers for releases after 9.6. Make sure
that <function>PQserverVersion()</> returns the correct value for
such cases.
</para>
</listitem>
<listitem>
<para>
Fix <application>ecpg</>'s code for <literal>unsigned long long</>
array elements (Michael Meskes)
</para>
</listitem>
<listitem>
<para>
In <application>pg_dump</> with both <option>-c</> and <option>-C</>
options, avoid emitting an unwanted <literal>CREATE SCHEMA public</>
command (David Johnston, Tom Lane)
</para>
</listitem>
<listitem>
<para>
Improve handling of <systemitem>SIGTERM</>/control-C in
parallel <application>pg_dump</> and <application>pg_restore</> (Tom
Lane)
</para>
<para>
Make sure that the worker processes will exit promptly, and also arrange
to send query-cancel requests to the connected backends, in case they
are doing something long-running such as a <command>CREATE INDEX</>.
</para>
</listitem>
<listitem>
<para>
Fix error reporting in parallel <application>pg_dump</>
and <application>pg_restore</> (Tom Lane)
</para>
<para>
Previously, errors reported by <application>pg_dump</>
or <application>pg_restore</> worker processes might never make it to
the user's console, because the messages went through the master
process, and there were various deadlock scenarios that would prevent
the master process from passing on the messages. Instead, just print
everything to <literal>stderr</>. In some cases this will result in
duplicate messages (for instance, if all the workers report a server
shutdown), but that seems better than no message.
</para>
</listitem>
<listitem>
<para>
Ensure that parallel <application>pg_dump</>
or <application>pg_restore</> on Windows will shut down properly
after an error (Kyotaro Horiguchi)
</para>
<para>
Previously, it would report the error, but then just sit until
manually stopped by the user.
</para>
</listitem>
<listitem>
<para>
Make <application>pg_dump</> behave better when built without zlib
support (Kyotaro Horiguchi)
</para>
<para>
It didn't work right for parallel dumps, and emitted some rather
pointless warnings in other cases.
</para>
</listitem>
<listitem>
<para>
Make <application>pg_basebackup</> accept <literal>-Z 0</> as
specifying no compression (Fujii Masao)
</para>
</listitem>
<listitem>
<para>
Fix makefiles' rule for building AIX shared libraries to be safe for
parallel make (Noah Misch)
</para>
</listitem>
<listitem>
<para>
Fix TAP tests and MSVC scripts to work when build directory's path
name contains spaces (Michael Paquier, Kyotaro Horiguchi)
</para>
</listitem>
<listitem>
<para>
Be more predictable about reporting <quote>statement timeout</>
versus <quote>lock timeout</> (Tom Lane)
</para>
<para>
On heavily loaded machines, the regression tests sometimes failed due
to reporting <quote>lock timeout</> even though the statement timeout
should have occurred first.
</para>
</listitem>
<listitem>
<para>
Make regression tests safe for Danish and Welsh locales (Jeff Janes,
Tom Lane)
</para>
<para>
Change some test data that triggered the unusual sorting rules of
these locales.
</para>
</listitem>
<listitem>
<para>
Update our copy of the timezone code to match
IANA's <application>tzcode</> release 2016c (Tom Lane)
</para>
<para>
This is needed to cope with anticipated future changes in the time
zone data files. It also fixes some corner-case bugs in coping with
unusual time zones.
</para>
</listitem>
<listitem>
<para>
Update time zone data files to <application>tzdata</> release 2016f
for DST law changes in Kemerovo and Novosibirsk, plus historical
corrections for Azerbaijan, Belarus, and Morocco.
</para>
</listitem>
</itemizedlist>
</sect2>
</sect1>
<sect1 id="release-9-4-8">
<title>Release 9.4.8</title>

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@ -1,6 +1,934 @@
<!-- doc/src/sgml/release-9.5.sgml -->
<!-- See header comment in release.sgml about typical markup -->
<sect1 id="release-9-5-4">
<title>Release 9.5.4</title>
<note>
<title>Release Date</title>
<simpara>2016-08-11</simpara>
</note>
<para>
This release contains a variety of fixes from 9.5.3.
For information about new features in the 9.5 major release, see
<xref linkend="release-9-5">.
</para>
<sect2>
<title>Migration to Version 9.5.4</title>
<para>
A dump/restore is not required for those running 9.5.X.
</para>
<para>
However, if you are upgrading from a version earlier than 9.5.2,
see <xref linkend="release-9-5-2">.
</para>
</sect2>
<sect2>
<title>Changes</title>
<itemizedlist>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [4452000f3] 2016-07-26 15:25:02 -0400
Branch: REL9_5_STABLE [d2ef7758d] 2016-07-26 15:25:02 -0400
Branch: REL9_4_STABLE [0733188cc] 2016-07-26 15:25:02 -0400
Branch: REL9_3_STABLE [c235d510e] 2016-07-26 15:25:02 -0400
Branch: REL9_2_STABLE [bcdd8a194] 2016-07-26 15:25:02 -0400
Branch: REL9_1_STABLE [d243bf77c] 2016-07-26 15:25:02 -0400
Branch: master [9492cf86e] 2016-07-28 16:09:15 -0400
Branch: REL9_5_STABLE [1e2f96f0a] 2016-07-28 16:09:15 -0400
Branch: REL9_4_STABLE [66f7e4081] 2016-07-28 16:09:15 -0400
Branch: REL9_3_STABLE [069714387] 2016-07-28 16:09:15 -0400
Branch: REL9_2_STABLE [7b8526e5d] 2016-07-28 16:09:15 -0400
Branch: REL9_1_STABLE [c0e5096fc] 2016-07-28 16:09:15 -0400
-->
<para>
Fix corner-case misbehaviors for <literal>IS NULL</>/<literal>IS NOT
NULL</> applied to nested composite values (Andrew Gierth, Tom Lane)
</para>
<para>
The SQL standard specifies that <literal>IS NULL</> should return
TRUE for a row of all null values (thus <literal>ROW(NULL,NULL) IS
NULL</> yields TRUE), but this is not meant to apply recursively
(thus <literal>ROW(NULL, ROW(NULL,NULL)) IS NULL</> yields FALSE).
The core executor got this right, but certain planner optimizations
treated the test as recursive (thus producing TRUE in both cases),
and <filename>contrib/postgres_fdw</> could produce remote queries
that misbehaved similarly.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [eae1ad9b6] 2016-05-23 19:23:36 -0400
Branch: REL9_5_STABLE [e504d915b] 2016-05-23 19:23:36 -0400
-->
<para>
Fix <quote>unrecognized node type</> error for <command>INSERT ... ON
CONFLICT</> within a recursive CTE (a <literal>WITH</> item) (Peter
Geoghegan)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [26e66184d] 2016-05-11 16:20:23 -0400
Branch: REL9_5_STABLE [58d802410] 2016-05-11 16:20:03 -0400
-->
<para>
Fix <command>INSERT ... ON CONFLICT</> to successfully match index
expressions or index predicates that are simplified during the
planner's expression preprocessing phase (Tom Lane)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [9c810a2ed] 2016-07-04 16:09:11 -0400
Branch: REL9_5_STABLE [31ce32ade] 2016-07-04 16:09:11 -0400
-->
<para>
Correctly handle violations of exclusion constraints that apply to
the target table of an <literal>INSERT ... ON CONFLICT</> command,
but are not one of the selected arbiter indexes (Tom Lane)
</para>
<para>
Such a case should raise a normal constraint-violation error, but it
got into an infinite loop instead.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [8a13d5e6d] 2016-05-11 17:06:53 -0400
Branch: REL9_5_STABLE [428484ce1] 2016-05-11 17:06:53 -0400
-->
<para>
Fix <command>INSERT ... ON CONFLICT</> to not fail if the target
table has a unique index on OID (Tom Lane)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [4c56f3269] 2016-06-16 17:16:32 -0400
Branch: REL9_5_STABLE [a41b14f94] 2016-06-16 17:16:40 -0400
Branch: REL9_4_STABLE [2a8b5d210] 2016-06-16 17:16:44 -0400
Branch: REL9_3_STABLE [519445ba2] 2016-06-16 17:16:48 -0400
Branch: REL9_2_STABLE [f66e0fec3] 2016-06-16 17:16:53 -0400
Branch: REL9_1_STABLE [7b97dafa2] 2016-06-16 17:16:58 -0400
-->
<para>
Make the <type>inet</> and <type>cidr</> data types properly reject
IPv6 addresses with too many colon-separated fields (Tom Lane)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [278148907] 2016-07-16 14:42:37 -0400
Branch: REL9_5_STABLE [884bae143] 2016-07-16 14:42:37 -0400
Branch: REL9_4_STABLE [59fa0195c] 2016-07-16 14:42:37 -0400
Branch: REL9_3_STABLE [16e28fcec] 2016-07-16 14:42:37 -0400
Branch: REL9_2_STABLE [89b301104] 2016-07-16 14:42:37 -0400
Branch: REL9_1_STABLE [608cc0c41] 2016-07-16 14:42:37 -0400
-->
<para>
Prevent crash in <function>close_ps()</>
(the <type>point</> <literal>##</> <type>lseg</> operator)
for NaN input coordinates (Tom Lane)
</para>
<para>
Make it return NULL instead of crashing.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [0daeba0e9] 2016-07-01 11:40:33 -0400
Branch: REL9_5_STABLE [40d0bd8d5] 2016-07-01 11:40:22 -0400
Branch: REL9_4_STABLE [b25d87f91] 2016-07-01 11:40:22 -0400
Branch: REL9_3_STABLE [b0f20c2ea] 2016-07-01 11:40:22 -0400
-->
<para>
Avoid possible crash in <function>pg_get_expr()</> when inconsistent
values are passed to it (Michael Paquier, Thomas Munro)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [874fe3aea] 2016-06-27 15:57:50 -0400
Branch: REL9_5_STABLE [1651b9aa2] 2016-06-27 15:57:21 -0400
Branch: REL9_4_STABLE [dc9e03bf4] 2016-06-27 15:57:21 -0400
Branch: REL9_3_STABLE [17bfef80e] 2016-06-27 15:57:21 -0400
-->
<para>
Do not run the planner on the query contained in <literal>CREATE
MATERIALIZED VIEW</> or <literal>CREATE TABLE AS</>
when <literal>WITH NO DATA</> is specified (Michael Paquier,
Tom Lane)
</para>
<para>
This avoids some unnecessary failure conditions, for example if a
stable function invoked by the materialized view depends on a table
that doesn't exist yet.
</para>
</listitem>
<listitem>
<!--
Author: Andres Freund <andres@anarazel.de>
Branch: master [bfa2ab56b] 2016-07-15 17:49:48 -0700
Branch: REL9_5_STABLE [1f9534b49] 2016-07-15 17:49:48 -0700
Branch: REL9_4_STABLE [3d5b227ba] 2016-07-15 17:49:48 -0700
Branch: REL9_3_STABLE [2e51ae1f6] 2016-07-15 17:49:48 -0700
Branch: REL9_2_STABLE [941557f18] 2016-07-15 17:49:48 -0700
Branch: REL9_1_STABLE [37276017f] 2016-07-15 17:49:49 -0700
-->
<para>
Avoid unsafe intermediate state during expensive paths
through <function>heap_update()</> (Masahiko Sawada, Andres Freund)
</para>
<para>
Previously, these cases locked the target tuple (by setting its XMAX)
but did not WAL-log that action, thus risking data integrity problems
if the page were spilled to disk and then a database crash occurred
before the tuple update could be completed.
</para>
</listitem>
<listitem>
<!--
Author: Andres Freund <andres@anarazel.de>
Branch: master [a4d357bfb] 2016-07-15 14:45:37 -0700
Branch: REL9_5_STABLE [b33e81cba] 2016-07-15 14:45:38 -0700
Branch: REL9_4_STABLE [f66828ba6] 2016-07-15 14:50:46 -0700
Branch: REL9_3_STABLE [46acbeb2f] 2016-07-15 14:51:03 -0700
-->
<para>
Fix hint bit update during WAL replay of row locking operations
(Andres Freund)
</para>
<para>
The only known consequence of this problem is that row locks held by
a prepared, but uncommitted, transaction might fail to be enforced
after a crash and restart.
</para>
</listitem>
<listitem>
<!--
Author: Alvaro Herrera <alvherre@alvh.no-ip.org>
Branch: master [533e9c6b0] 2016-07-15 14:17:20 -0400
Branch: REL9_5_STABLE [649dd1b58] 2016-07-15 14:17:20 -0400
Branch: REL9_4_STABLE [166873dd0] 2016-07-15 14:17:20 -0400
Branch: REL9_3_STABLE [6c243f90a] 2016-07-15 14:17:20 -0400
-->
<para>
Avoid unnecessary <quote>could not serialize access</> errors when
acquiring <literal>FOR KEY SHARE</> row locks in serializable mode
(&Aacute;lvaro Herrera)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [69f526aa4] 2016-06-03 15:14:50 -0400
Branch: REL9_5_STABLE [a102f98e2] 2016-06-03 15:14:35 -0400
Branch: master [9eaf5be50] 2016-06-03 18:07:14 -0400
Branch: REL9_5_STABLE [8355897ff] 2016-06-03 18:07:14 -0400
-->
<para>
Make sure <quote>expanded</> datums returned by a plan node are
read-only (Tom Lane)
</para>
<para>
This avoids failures in some cases where the result of a lower plan
node is referenced in multiple places in upper nodes. So far as
core <productname>PostgreSQL</> is concerned, only array values
returned by PL/pgSQL functions are at risk; but extensions might
use expanded datums for other things.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [0b0baf262] 2016-06-16 12:17:38 -0400
Branch: REL9_5_STABLE [4f5995dd9] 2016-06-16 12:17:11 -0400
Branch: REL9_4_STABLE [e542bfe61] 2016-06-16 12:17:16 -0400
Branch: REL9_3_STABLE [29987b2e1] 2016-06-16 12:17:20 -0400
Branch: REL9_2_STABLE [23ed284a5] 2016-06-16 12:17:25 -0400
Branch: master [e45e990e4] 2016-06-22 11:55:18 -0400
Branch: REL9_5_STABLE [f2c28bb1f] 2016-06-22 11:55:24 -0400
Branch: REL9_4_STABLE [f22a3e5ce] 2016-06-22 11:55:28 -0400
Branch: REL9_3_STABLE [dafdcbb6c] 2016-06-22 11:55:32 -0400
Branch: REL9_2_STABLE [dd41661d2] 2016-06-22 11:55:35 -0400
-->
<para>
Avoid crash in <literal>postgres -C</> when the specified variable
has a null string value (Michael Paquier)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [80b346c20] 2016-07-29 12:52:57 -0400
Branch: REL9_5_STABLE [c8966a925] 2016-07-29 12:53:02 -0400
-->
<para>
Prevent unintended waits for the receiver in WAL sender processes
(Kyotaro Horiguchi)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [f8c58554d] 2016-06-30 12:37:02 -0400
Branch: REL9_5_STABLE [8caf9fe62] 2016-06-30 12:37:02 -0400
Branch: REL9_4_STABLE [1843d88e0] 2016-06-30 12:37:02 -0400
-->
<para>
Fix possible loss of large subtransactions in logical decoding
(Petru-Florin Mihancea)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [bcbecbce2] 2016-08-07 13:15:55 -0400
Branch: REL9_5_STABLE [71dca408c] 2016-08-07 13:15:55 -0400
Branch: REL9_4_STABLE [c63588feb] 2016-08-07 13:15:55 -0400
-->
<para>
Fix failure of logical decoding when a subtransaction contains no
actual changes (Marko Tiikkaja, Andrew Gierth)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [52e8fc3e2] 2016-05-25 17:48:15 -0400
Branch: REL9_5_STABLE [b2355a29c] 2016-05-25 17:48:15 -0400
Branch: REL9_4_STABLE [4b612a78f] 2016-05-25 17:48:15 -0400
Branch: REL9_3_STABLE [463207630] 2016-05-25 17:48:15 -0400
-->
<para>
Ensure that backends see up-to-date statistics for shared catalogs
(Tom Lane)
</para>
<para>
The statistics collector failed to update the statistics file for
shared catalogs after a request from a regular backend. This problem
was partially masked because the autovacuum launcher regularly makes
requests that did cause such updates; however, it became obvious with
autovacuum disabled.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [22b27b4c9] 2016-05-31 15:55:15 -0400
Branch: REL9_5_STABLE [47215c16f] 2016-05-31 15:54:46 -0400
Branch: REL9_4_STABLE [3ffff7257] 2016-05-31 15:54:46 -0400
Branch: REL9_3_STABLE [a84cad224] 2016-05-31 15:54:47 -0400
-->
<para>
Avoid redundant writes of the statistics files when multiple
backends request updates close together (Tom Lane, Tomas Vondra)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [996d27397] 2016-05-24 15:20:36 -0400
Branch: REL9_5_STABLE [a34c3dd50] 2016-05-24 15:20:12 -0400
Branch: REL9_4_STABLE [defe936ef] 2016-05-24 15:20:12 -0400
Branch: REL9_3_STABLE [9f3e4c813] 2016-05-24 15:20:12 -0400
Branch: REL9_2_STABLE [2e7f0c34a] 2016-05-24 15:20:12 -0400
Branch: REL9_1_STABLE [fe1731fca] 2016-05-24 15:20:12 -0400
Branch: master [2d2e40e3b] 2016-05-24 15:47:51 -0400
Branch: REL9_5_STABLE [bbbe2c97e] 2016-05-24 15:47:51 -0400
Branch: REL9_4_STABLE [edd8873ff] 2016-05-24 15:47:51 -0400
Branch: REL9_3_STABLE [ff98ae908] 2016-05-24 15:47:51 -0400
Branch: REL9_2_STABLE [4cf0978ea] 2016-05-24 15:47:51 -0400
Branch: REL9_1_STABLE [5551dac59] 2016-05-24 15:47:51 -0400
-->
<para>
Avoid consuming a transaction ID during <command>VACUUM</>
(Alexander Korotkov)
</para>
<para>
Some cases in <command>VACUUM</> unnecessarily caused an XID to be
assigned to the current transaction. Normally this is negligible,
but if one is up against the XID wraparound limit, consuming more
XIDs during anti-wraparound vacuums is a very bad thing.
</para>
</listitem>
<listitem>
<!--
Author: Alvaro Herrera <alvherre@alvh.no-ip.org>
Branch: master [e3ad3ffa6] 2016-06-24 18:29:28 -0400
Branch: REL9_5_STABLE [d372cb173] 2016-06-24 18:29:28 -0400
Branch: REL9_4_STABLE [61b24fef8] 2016-06-24 18:29:28 -0400
Branch: REL9_3_STABLE [28f294afd] 2016-06-24 18:29:28 -0400
-->
<para>
Prevent possible failure when vacuuming multixact IDs in an
installation that has been pg_upgrade'd from pre-9.3 (Andrew Gierth,
&Aacute;lvaro Herrera)
</para>
<para>
The usual symptom of this bug is errors
like <quote>MultiXactId <replaceable>NNN</> has not been created
yet -- apparent wraparound</quote>.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [f64340e74] 2016-06-06 17:44:17 -0400
Branch: REL9_5_STABLE [5acc58c5e] 2016-06-06 17:44:17 -0400
Branch: REL9_4_STABLE [a4400c251] 2016-06-06 17:44:17 -0400
Branch: REL9_3_STABLE [5f3e0e84b] 2016-06-06 17:44:17 -0400
Branch: REL9_2_STABLE [3201709de] 2016-06-06 17:44:18 -0400
Branch: REL9_1_STABLE [32ceb8dfb] 2016-06-06 17:44:18 -0400
-->
<para>
When a manual <command>ANALYZE</> specifies a column list, don't
reset the table's <literal>changes_since_analyze</> counter
(Tom Lane)
</para>
<para>
If we're only analyzing some columns, we should not prevent routine
auto-analyze from happening for the other columns.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [95bee941b] 2016-08-07 18:52:02 -0400
Branch: REL9_5_STABLE [cb5c14984] 2016-08-07 18:52:02 -0400
Branch: REL9_4_STABLE [8f180a6cc] 2016-08-07 18:52:02 -0400
Branch: REL9_3_STABLE [20a859504] 2016-08-07 18:52:02 -0400
Branch: REL9_2_STABLE [127d73009] 2016-08-07 18:52:02 -0400
Branch: REL9_1_STABLE [a449ad095] 2016-08-07 18:52:02 -0400
-->
<para>
Fix <command>ANALYZE</>'s overestimation of <literal>n_distinct</>
for a unique or nearly-unique column with many null entries (Tom
Lane)
</para>
<para>
The nulls could get counted as though they were themselves distinct
values, leading to serious planner misestimates in some types of
queries.
</para>
</listitem>
<listitem>
<!--
Author: Alvaro Herrera <alvherre@alvh.no-ip.org>
Branch: master [15739393e] 2016-05-10 16:23:54 -0300
Branch: REL9_5_STABLE [7516cdb76] 2016-05-10 16:23:54 -0300
Branch: REL9_4_STABLE [e9a273199] 2016-05-10 16:23:54 -0300
Branch: REL9_3_STABLE [92ebe509e] 2016-05-10 16:23:54 -0300
Branch: REL9_2_STABLE [ca4c6d043] 2016-05-10 16:23:54 -0300
Branch: REL9_1_STABLE [2152762c5] 2016-05-10 16:23:54 -0300
-->
<para>
Prevent autovacuum from starting multiple workers for the same shared
catalog (&Aacute;lvaro Herrera)
</para>
<para>
Normally this isn't much of a problem because the vacuum doesn't take
long anyway; but in the case of a severely bloated catalog, it could
result in all but one worker uselessly waiting instead of doing
useful work on other tables.
</para>
</listitem>
<listitem>
<!--
Author: Kevin Grittner <kgrittn@postgresql.org>
Branch: master [7392eed7c] 2016-06-02 12:23:01 -0500
Branch: REL9_5_STABLE [236d569f9] 2016-06-02 12:23:19 -0500
-->
<para>
Fix bug in b-tree mark/restore processing (Kevin Grittner)
</para>
<para>
This error could lead to incorrect join results or assertion failures
in a merge join whose inner source node is a b-tree indexscan.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [e89526d4f] 2016-08-06 14:28:37 -0400
Branch: REL9_5_STABLE [ee5d1de04] 2016-08-06 14:28:37 -0400
Branch: REL9_4_STABLE [98d5f366b] 2016-08-06 14:28:38 -0400
-->
<para>
Avoid duplicate buffer lock release when abandoning a b-tree index
page deletion attempt (Tom Lane)
</para>
<para>
This mistake prevented <command>VACUUM</> from completing in some
cases involving corrupt b-tree indexes.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [8cf739de8] 2016-06-24 16:57:36 -0400
Branch: REL9_5_STABLE [07f69137b] 2016-06-24 16:57:36 -0400
-->
<para>
Fix building of large (bigger than <varname>shared_buffers</>)
hash indexes (Tom Lane)
</para>
<para>
The code path used for large indexes contained a bug causing
incorrect hash values to be inserted into the index, so that
subsequent index searches always failed, except for tuples inserted
into the index after the initial build.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [1acf75725] 2016-07-14 18:45:59 -0400
Branch: REL9_5_STABLE [503546376] 2016-07-14 18:46:00 -0400
Branch: REL9_4_STABLE [054052b3a] 2016-07-14 18:46:00 -0400
Branch: REL9_3_STABLE [57dba87a7] 2016-07-14 18:46:00 -0400
Branch: REL9_2_STABLE [042009f24] 2016-07-14 18:46:00 -0400
-->
<para>
Prevent infinite loop in GiST index build for geometric columns
containing NaN component values (Tom Lane)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [8a859691d] 2016-06-05 11:53:06 -0400
Branch: REL9_5_STABLE [a7aa61ffe] 2016-06-05 11:53:06 -0400
-->
<para>
Fix possible crash during a nearest-neighbor (<literal>ORDER BY</>
distance) indexscan on a <filename>contrib/btree_gist</> index on
an <type>interval</> column (Peter Geoghegan)
</para>
</listitem>
<listitem>
<!--
Author: Alvaro Herrera <alvherre@alvh.no-ip.org>
Branch: master [975ad4e60] 2016-05-30 14:47:22 -0400
Branch: REL9_5_STABLE [2973d7d02] 2016-05-30 14:47:22 -0400
-->
<para>
Fix <quote>PANIC: failed to add BRIN tuple</> error when attempting
to update a BRIN index entry (&Aacute;lvaro Herrera)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [8d498a5c8] 2016-08-04 16:06:14 -0400
Branch: REL9_5_STABLE [c1d6ee879] 2016-08-04 16:06:14 -0400
-->
<para>
Fix possible crash during background worker shutdown (Dmitry Ivanov)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [baebab3ac] 2016-07-12 18:07:03 -0400
Branch: REL9_5_STABLE [a0943dbbe] 2016-07-12 18:06:50 -0400
-->
<para>
Fix PL/pgSQL's handling of the <literal>INTO</> clause
within <command>IMPORT FOREIGN SCHEMA</> commands (Tom Lane)
</para>
</listitem>
<listitem>
<!--
Author: Peter Eisentraut <peter_e@gmx.net>
Branch: master [f36ca9af0] 2016-07-17 09:15:37 -0400
Branch: REL9_5_STABLE [fb279fc7a] 2016-07-17 09:24:06 -0400
Branch: REL9_4_STABLE [97d741650] 2016-07-17 09:37:33 -0400
Branch: REL9_3_STABLE [805f2bb53] 2016-07-17 09:38:23 -0400
Branch: REL9_2_STABLE [6c0be49b2] 2016-07-17 09:39:51 -0400
Branch: REL9_1_STABLE [84d679204] 2016-07-17 09:41:08 -0400
-->
<para>
Fix <filename>contrib/btree_gin</> to handle the smallest
possible <type>bigint</> value correctly (Peter Eisentraut)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [69dc5ae40] 2016-08-05 18:58:12 -0400
Branch: REL9_5_STABLE [cae0d4f9b] 2016-08-05 18:58:19 -0400
Branch: REL9_4_STABLE [a3cd60ebf] 2016-08-05 18:58:23 -0400
Branch: REL9_3_STABLE [c3107f18a] 2016-08-05 18:58:28 -0400
Branch: REL9_2_STABLE [3e40d9227] 2016-08-05 18:58:32 -0400
Branch: REL9_1_STABLE [1f63b0e09] 2016-08-05 18:58:36 -0400
-->
<para>
Teach libpq to correctly decode server version from future servers
(Peter Eisentraut)
</para>
<para>
It's planned to switch to two-part instead of three-part server
version numbers for releases after 9.6. Make sure
that <function>PQserverVersion()</> returns the correct value for
such cases.
</para>
</listitem>
<listitem>
<!--
Author: Michael Meskes <meskes@postgresql.org>
Branch: master [3ebc88e56] 2016-08-01 15:08:12 +0200
Branch: REL9_5_STABLE [dc6b20c6b] 2016-08-01 15:09:23 +0200
Branch: REL9_4_STABLE [057404854] 2016-08-01 15:09:12 +0200
Branch: REL9_3_STABLE [3ca359426] 2016-08-01 15:08:59 +0200
Branch: REL9_2_STABLE [295edbecf] 2016-08-01 15:08:48 +0200
Branch: REL9_1_STABLE [c15f502b6] 2016-08-01 15:08:36 +0200
-->
<para>
Fix <application>ecpg</>'s code for <literal>unsigned long long</>
array elements (Michael Meskes)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [e2e95f5ef] 2016-08-02 12:49:40 -0400
Branch: REL9_5_STABLE [89c30d113] 2016-08-02 12:49:41 -0400
Branch: REL9_4_STABLE [2ff8a2fc0] 2016-08-02 12:49:04 -0400
Branch: REL9_3_STABLE [6693c9d7b] 2016-08-02 12:49:09 -0400
Branch: REL9_2_STABLE [a5a7caaa1] 2016-08-02 12:49:15 -0400
-->
<para>
In <application>pg_dump</> with both <option>-c</> and <option>-C</>
options, avoid emitting an unwanted <literal>CREATE SCHEMA public</>
command (David Johnston, Tom Lane)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [e652273e0] 2016-06-02 13:28:17 -0400
Branch: REL9_5_STABLE [404429038] 2016-06-02 13:28:18 -0400
Branch: REL9_4_STABLE [96aac0e6d] 2016-06-02 13:27:53 -0400
Branch: REL9_3_STABLE [5c9724305] 2016-06-02 13:27:53 -0400
Branch: master [6c72a28e5] 2016-06-03 11:29:38 -0400
Branch: REL9_5_STABLE [ec5622351] 2016-06-03 11:29:20 -0400
Branch: REL9_4_STABLE [53c2601a5] 2016-06-03 11:29:20 -0400
Branch: REL9_3_STABLE [4a21c6fd7] 2016-06-03 11:29:20 -0400
-->
<para>
Improve handling of <systemitem>SIGTERM</>/control-C in
parallel <application>pg_dump</> and <application>pg_restore</> (Tom
Lane)
</para>
<para>
Make sure that the worker processes will exit promptly, and also arrange
to send query-cancel requests to the connected backends, in case they
are doing something long-running such as a <command>CREATE INDEX</>.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [9abd64ec9] 2016-05-25 12:40:12 -0400
Branch: REL9_5_STABLE [af6555b80] 2016-05-25 12:39:57 -0400
Branch: REL9_4_STABLE [ea274b2f4] 2016-05-25 12:39:57 -0400
Branch: REL9_3_STABLE [1c8205159] 2016-05-25 12:39:57 -0400
-->
<para>
Fix error reporting in parallel <application>pg_dump</>
and <application>pg_restore</> (Tom Lane)
</para>
<para>
Previously, errors reported by <application>pg_dump</>
or <application>pg_restore</> worker processes might never make it to
the user's console, because the messages went through the master
process, and there were various deadlock scenarios that would prevent
the master process from passing on the messages. Instead, just print
everything to <literal>stderr</>. In some cases this will result in
duplicate messages (for instance, if all the workers report a server
shutdown), but that seems better than no message.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [df8d2d8c4] 2016-05-26 10:50:30 -0400
Branch: REL9_5_STABLE [6479df137] 2016-05-26 10:50:38 -0400
Branch: REL9_4_STABLE [d32bc204c] 2016-05-26 10:50:42 -0400
Branch: REL9_3_STABLE [b9784e1f7] 2016-05-26 10:50:46 -0400
-->
<para>
Ensure that parallel <application>pg_dump</>
or <application>pg_restore</> on Windows will shut down properly
after an error (Kyotaro Horiguchi)
</para>
<para>
Previously, it would report the error, but then just sit until
manually stopped by the user.
</para>
</listitem>
<listitem>
<!--
Author: Magnus Hagander <magnus@hagander.net>
Branch: master [d74048def] 2016-05-26 22:14:23 +0200
Branch: REL9_5_STABLE [47e596976] 2016-05-26 22:18:04 +0200
-->
<para>
Make parallel <application>pg_dump</> fail cleanly when run against a
standby server (Magnus Hagander)
</para>
<para>
This usage is not supported
unless <option>--no-synchronized-snapshots</> is specified, but the
error was not handled very well.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [cae2bb198] 2016-05-26 11:51:04 -0400
Branch: REL9_5_STABLE [64b296976] 2016-05-26 11:51:11 -0400
Branch: REL9_4_STABLE [f2f18a37c] 2016-05-26 11:51:16 -0400
Branch: REL9_3_STABLE [99565a1ef] 2016-05-26 11:51:20 -0400
-->
<para>
Make <application>pg_dump</> behave better when built without zlib
support (Kyotaro Horiguchi)
</para>
<para>
It didn't work right for parallel dumps, and emitted some rather
pointless warnings in other cases.
</para>
</listitem>
<listitem>
<!--
Author: Fujii Masao <fujii@postgresql.org>
Branch: master [74d8c95b7] 2016-08-01 17:36:14 +0900
Branch: REL9_5_STABLE [928e92fda] 2016-08-01 17:37:18 +0900
Branch: REL9_4_STABLE [dbe56f2a1] 2016-08-01 17:37:41 +0900
Branch: REL9_3_STABLE [013f42372] 2016-08-01 17:37:53 +0900
Branch: REL9_2_STABLE [a21617759] 2016-08-01 17:38:00 +0900
Branch: REL9_1_STABLE [366f4a962] 2016-08-01 17:38:05 +0900
-->
<para>
Make <application>pg_basebackup</> accept <literal>-Z 0</> as
specifying no compression (Fujii Masao)
</para>
</listitem>
<listitem>
<!--
Author: Noah Misch <noah@leadboat.com>
Branch: master [e8564ef03] 2016-07-23 20:30:03 -0400
Branch: REL9_5_STABLE [cf35406f9] 2016-07-23 20:30:40 -0400
Branch: REL9_4_STABLE [f0c9e4697] 2016-07-23 20:30:44 -0400
Branch: REL9_3_STABLE [98b7a3cf2] 2016-07-23 20:30:48 -0400
Branch: REL9_2_STABLE [a4daf59ee] 2016-07-23 20:30:55 -0400
Branch: REL9_1_STABLE [b1fa6c0eb] 2016-07-23 20:30:59 -0400
-->
<para>
Fix makefiles' rule for building AIX shared libraries to be safe for
parallel make (Noah Misch)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [30b2731bd] 2016-07-09 16:47:38 -0400
Branch: REL9_5_STABLE [f80395ca1] 2016-07-09 16:47:39 -0400
Branch: REL9_4_STABLE [02a898b00] 2016-07-09 16:47:39 -0400
Branch: REL9_3_STABLE [57e9ea2dd] 2016-07-11 11:24:04 -0400
Branch: REL9_2_STABLE [fdf2ee62e] 2016-07-11 11:24:04 -0400
Branch: REL9_1_STABLE [71af6c006] 2016-07-11 11:24:04 -0400
-->
<para>
Fix TAP tests and MSVC scripts to work when build directory's path
name contains spaces (Michael Paquier, Kyotaro Horiguchi)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [9dd4178ce] 2016-05-27 10:40:20 -0400
Branch: REL9_5_STABLE [cea17ba07] 2016-05-27 10:40:20 -0400
Branch: REL9_4_STABLE [c2651cd24] 2016-05-27 10:40:20 -0400
Branch: REL9_3_STABLE [1f1e70a87] 2016-05-27 10:40:20 -0400
-->
<para>
Be more predictable about reporting <quote>statement timeout</>
versus <quote>lock timeout</> (Tom Lane)
</para>
<para>
On heavily loaded machines, the regression tests sometimes failed due
to reporting <quote>lock timeout</> even though the statement timeout
should have occurred first.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [b3399cb0f] 2016-07-21 13:11:00 -0400
Branch: REL9_5_STABLE [fd507d542] 2016-07-21 13:11:00 -0400
Branch: master [9d7abca90] 2016-07-22 15:41:39 -0400
Branch: REL9_5_STABLE [2aa2533f2] 2016-07-22 15:41:40 -0400
Branch: master [95810ed8e] 2016-07-21 14:24:07 -0400
Branch: REL9_5_STABLE [95e8b44f0] 2016-07-21 14:24:07 -0400
Branch: REL9_4_STABLE [dfddc452d] 2016-07-21 14:24:07 -0400
Branch: REL9_3_STABLE [0060638c8] 2016-07-21 14:24:07 -0400
Branch: REL9_2_STABLE [52502e7a5] 2016-07-21 14:24:07 -0400
Branch: REL9_1_STABLE [f61ecd01e] 2016-07-21 14:24:07 -0400
Branch: master [d70d11915] 2016-07-21 16:52:35 -0400
Branch: REL9_5_STABLE [d365dc3d1] 2016-07-21 16:52:36 -0400
Branch: REL9_4_STABLE [1156a9db8] 2016-07-21 16:52:36 -0400
Branch: REL9_3_STABLE [e15e7886e] 2016-07-21 16:52:36 -0400
Branch: REL9_2_STABLE [a1e750553] 2016-07-21 16:52:36 -0400
Branch: REL9_1_STABLE [ba64aed70] 2016-07-21 16:52:36 -0400
-->
<para>
Make regression tests safe for Danish and Welsh locales (Jeff Janes,
Tom Lane)
</para>
<para>
Change some test data that triggered the unusual sorting rules of
these locales.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: REL9_5_STABLE [19d477aa6] 2016-07-19 15:59:36 -0400
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Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: REL9_5_STABLE [0aabe80c6] 2016-07-19 17:53:31 -0400
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Branch: REL9_1_STABLE [d70df7867] 2016-07-19 17:53:31 -0400
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<para>
Update our copy of the timezone code to match
IANA's <application>tzcode</> release 2016c (Tom Lane)
</para>
<para>
This is needed to cope with anticipated future changes in the time
zone data files. It also fixes some corner-case bugs in coping with
unusual time zones.
</para>
</listitem>
<listitem>
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Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [a629330b2] 2016-08-05 12:59:29 -0400
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Branch: REL9_4_STABLE [8080337b0] 2016-08-05 12:58:46 -0400
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Branch: REL9_2_STABLE [7822792f7] 2016-08-05 12:58:58 -0400
Branch: REL9_1_STABLE [a44388ffe] 2016-08-05 12:59:02 -0400
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<para>
Update time zone data files to <application>tzdata</> release 2016f
for DST law changes in Kemerovo and Novosibirsk, plus historical
corrections for Azerbaijan, Belarus, and Morocco.
</para>
</listitem>
</itemizedlist>
</sect2>
</sect1>
<sect1 id="release-9-5-3">
<title>Release 9.5.3</title>