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+ <sect1 id="release-9-2-21">
+ <title>Release 9.2.21</title>
+
+ <note>
+ <title>Release Date</title>
+ <simpara>2017-05-11</simpara>
+ </note>
+
+ <para>
+ This release contains a variety of fixes from 9.2.20.
+ For information about new features in the 9.2 major release, see
+ <xref linkend="release-9-2">.
+ </para>
+
+ <para>
+ The <productname>PostgreSQL</> community will stop releasing updates
+ for the 9.2.X release series in September 2017.
+ Users are encouraged to update to a newer release branch soon.
+ </para>
+
+ <sect2>
+ <title>Migration to Version 9.2.21</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 9.2.20,
+ see <xref linkend="release-9-2-20">.
+ </para>
+
+ </sect2>
+
+ <sect2>
+ <title>Changes</title>
+
+ <itemizedlist>
+
+ <listitem>
+ <para>
+ Fix possible corruption of <quote>init forks</> of unlogged indexes
+ (Robert Haas, Michael Paquier)
+ </para>
+
+ <para>
+ This could result in an unlogged index being set to an invalid state
+ after a crash and restart. Such a problem would persist until the
+ index was dropped and rebuilt.
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ Fix incorrect reconstruction of <structname>pg_subtrans</> entries
+ when a standby server replays a prepared but uncommitted two-phase
+ transaction (Tom Lane)
+ </para>
+
+ <para>
+ In most cases this turned out to have no visible ill effects, but in
+ corner cases it could result in circular references
+ in <structname>pg_subtrans</>, potentially causing infinite loops
+ in queries that examine rows modified by the two-phase transaction.
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ Ensure parsing of queries in extension scripts sees the results of
+ immediately-preceding DDL (Julien Rouhaud, Tom Lane)
+ </para>
+
+ <para>
+ Due to lack of a cache flush step between commands in an extension
+ script file, non-utility queries might not see the effects of an
+ immediately preceding catalog change, such as <command>ALTER TABLE
+ ... RENAME</>.
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ Skip tablespace privilege checks when <command>ALTER TABLE ... ALTER
+ COLUMN TYPE</> rebuilds an existing index (Noah Misch)
+ </para>
+
+ <para>
+ The command failed if the calling user did not currently have
+ <literal>CREATE</> privilege for the tablespace containing the index.
+ That behavior seems unhelpful, so skip the check, allowing the
+ index to be rebuilt where it is.
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ Fix <command>ALTER TABLE ... VALIDATE CONSTRAINT</> to not recurse
+ to child tables when the constraint is marked <literal>NO INHERIT</>
+ (Amit Langote)
+ </para>
+
+ <para>
+ This fix prevents unwanted <quote>constraint does not exist</> failures
+ when no matching constraint is present in the child tables.
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ Fix <command>VACUUM</> to account properly for pages that could not
+ be scanned due to conflicting page pins (Andrew Gierth)
+ </para>
+
+ <para>
+ This tended to lead to underestimation of the number of tuples in
+ the table. In the worst case of a small heavily-contended
+ table, <command>VACUUM</> could incorrectly report that the table
+ contained no tuples, leading to very bad planning choices.
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ Ensure that bulk-tuple-transfer loops within a hash join are
+ interruptible by query cancel requests (Tom Lane, Thomas Munro)
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ Fix <function>cursor_to_xml()</> to produce valid output
+ with <replaceable>tableforest</> = false
+ (Thomas Munro, Peter Eisentraut)
+ </para>
+
+ <para>
+ Previously it failed to produce a wrapping <literal><table></>
+ element.
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ Improve performance of <structname>pg_timezone_names</> view
+ (Tom Lane, David Rowley)
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ Fix sloppy handling of corner-case errors from <function>lseek()</>
+ and <function>close()</> (Tom Lane)
+ </para>
+
+ <para>
+ Neither of these system calls are likely to fail in typical situations,
+ but if they did, <filename>fd.c</> could get quite confused.
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ Fix incorrect check for whether postmaster is running as a Windows
+ service (Michael Paquier)
+ </para>
+
+ <para>
+ This could result in attempting to write to the event log when that
+ isn't accessible, so that no logging happens at all.
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ Fix <application>ecpg</> to support <command>COMMIT PREPARED</>
+ and <command>ROLLBACK PREPARED</> (Masahiko Sawada)
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ Fix a double-free error when processing dollar-quoted string literals
+ in <application>ecpg</> (Michael Meskes)
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ In <application>pg_dump</>, fix incorrect schema and owner marking for
+ comments and security labels of some types of database objects
+ (Giuseppe Broccolo, Tom Lane)
+ </para>
+
+ <para>
+ In simple cases this caused no ill effects; but for example, a
+ schema-selective restore might omit comments it should include, because
+ they were not marked as belonging to the schema of their associated
+ object.
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ Avoid emitting an invalid list file in <literal>pg_restore -l</>
+ when SQL object names contain newlines (Tom Lane)
+ </para>
+
+ <para>
+ Replace newlines by spaces, which is sufficient to make the output
+ valid for <literal>pg_restore -L</>'s purposes.
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ Fix <application>pg_upgrade</> to transfer comments and security labels
+ attached to <quote>large objects</> (blobs) (Stephen Frost)
+ </para>
+
+ <para>
+ Previously, blobs were correctly transferred to the new database, but
+ any comments or security labels attached to them were lost.
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ Improve error handling
+ in <filename>contrib/adminpack</>'s <function>pg_file_write()</>
+ function (Noah Misch)
+ </para>
+
+ <para>
+ Notably, it failed to detect errors reported
+ by <function>fclose()</>.
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ In <filename>contrib/dblink</>, avoid leaking the previous unnamed
+ connection when establishing a new unnamed connection (Joe Conway)
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ Support OpenSSL 1.1.0 (Heikki Linnakangas, Andreas Karlsson, Tom Lane)
+ </para>
+
+ <para>
+ This is a back-patch of work previously done in newer branches;
+ it's needed since many platforms are adopting newer OpenSSL versions.
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ Support Tcl 8.6 in MSVC builds (Álvaro Herrera)
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ Sync our copy of the timezone library with IANA release tzcode2017b
+ (Tom Lane)
+ </para>
+
+ <para>
+ This fixes a bug affecting some DST transitions in January 2038.
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ Update time zone data files to <application>tzdata</> release 2017b
+ for DST law changes in Chile, Haiti, and Mongolia, plus historical
+ corrections for Ecuador, Kazakhstan, Liberia, and Spain.
+ Switch to numeric abbreviations for numerous time zones in South
+ America, the Pacific and Indian oceans, and some Asian and Middle
+ Eastern countries.
+ </para>
+
+ <para>
+ The IANA time zone database previously provided textual abbreviations
+ for all time zones, sometimes making up abbreviations that have little
+ or no currency among the local population. They are in process of
+ reversing that policy in favor of using numeric UTC offsets in zones
+ where there is no evidence of real-world use of an English
+ abbreviation. At least for the time being, <productname>PostgreSQL</>
+ will continue to accept such removed abbreviations for timestamp input.
+ But they will not be shown in the <structname>pg_timezone_names</>
+ view nor used for output.
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ Use correct daylight-savings rules for POSIX-style time zone names
+ in MSVC builds (David Rowley)
+ </para>
+
+ <para>
+ The Microsoft MSVC build scripts neglected to install
+ the <filename>posixrules</> file in the timezone directory tree.
+ This resulted in the timezone code falling back to its built-in
+ rule about what DST behavior to assume for a POSIX-style time zone
+ name. For historical reasons that still corresponds to the DST rules
+ the USA was using before 2007 (i.e., change on first Sunday in April
+ and last Sunday in October). With this fix, a POSIX-style zone name
+ will use the current and historical DST transition dates of
+ the <literal>US/Eastern</> zone. If you don't want that, remove
+ the <filename>posixrules</> file, or replace it with a copy of some
+ other zone file (see <xref linkend="datatype-timezones">). Note that
+ due to caching, you may need to restart the server to get such changes
+ to take effect.
+ </para>
+ </listitem>
+
+ </itemizedlist>
+
+ </sect2>
+ </sect1>
+
<sect1 id="release-9-2-20">
<title>Release 9.2.20</title>
projects / postgresql / commitdiff