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>Appendix E. Release Notes</TD
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><A
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>E.117. Release 8.3.4</A
></H1
><DIV
CLASS="FORMALPARA"
><P
><B
>Release date: </B
>2008-09-22</P
></DIV
><P
> This release contains a variety of fixes from 8.3.3.
For information about new features in the 8.3 major release, see
<A
HREF="release-8-3.html"
>Section E.121</A
>.
</P
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN130886"
>E.117.1. Migration to Version 8.3.4</A
></H2
><P
> A dump/restore is not required for those running 8.3.X.
However, if you are upgrading from a version earlier than 8.3.1,
see <A
HREF="release-8-3-1.html"
>Section E.120</A
>.
</P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN130890"
>E.117.2. Changes</A
></H2
><P
></P
><UL
><LI
><P
> Fix bug in btree WAL recovery code (Heikki)
</P
><P
> Recovery failed if the WAL ended partway through a page split operation.
</P
></LI
><LI
><P
> Fix potential use of wrong cutoff XID for HOT page pruning (Alvaro)
</P
><P
> This error created a risk of corruption in system
catalogs that are consulted by <TT
CLASS="COMMAND"
>VACUUM</TT
>: dead tuple versions
might be removed too soon. The impact of this on actual database
operations would be minimal, since the system doesn't follow MVCC
rules while examining catalogs, but it might result in transiently
wrong output from <SPAN
CLASS="APPLICATION"
>pg_dump</SPAN
> or other client programs.
</P
></LI
><LI
><P
> Fix potential miscalculation of <TT
CLASS="STRUCTFIELD"
>datfrozenxid</TT
> (Alvaro)
</P
><P
> This error may explain some recent reports of failure to remove old
<TT
CLASS="STRUCTNAME"
>pg_clog</TT
> data.
</P
></LI
><LI
><P
> Fix incorrect HOT updates after <TT
CLASS="STRUCTNAME"
>pg_class</TT
> is reindexed
(Tom)
</P
><P
> Corruption of <TT
CLASS="STRUCTNAME"
>pg_class</TT
> could occur if <TT
CLASS="LITERAL"
>REINDEX
TABLE pg_class</TT
> was followed in the same session by an <TT
CLASS="LITERAL"
>ALTER
TABLE RENAME</TT
> or <TT
CLASS="LITERAL"
>ALTER TABLE SET SCHEMA</TT
> command.
</P
></LI
><LI
><P
> Fix missed <SPAN
CLASS="QUOTE"
>"combo cid"</SPAN
> case (Karl Schnaitter)
</P
><P
> This error made rows incorrectly invisible to a transaction in which they
had been deleted by multiple subtransactions that all aborted.
</P
></LI
><LI
><P
> Prevent autovacuum from crashing if the table it's currently
checking is deleted at just the wrong time (Alvaro)
</P
></LI
><LI
><P
> Widen local lock counters from 32 to 64 bits (Tom)
</P
><P
> This responds to reports that the counters could overflow in
sufficiently long transactions, leading to unexpected <SPAN
CLASS="QUOTE"
>"lock is
already held"</SPAN
> errors.
</P
></LI
><LI
><P
> Fix possible duplicate output of tuples during a GiST index scan (Teodor)
</P
></LI
><LI
><P
> Regenerate foreign key checking queries from scratch when either
table is modified (Tom)
</P
><P
> Previously, 8.3 would attempt to replan the query, but would work from
previously generated query text. This led to failures if a
table or column was renamed.
</P
></LI
><LI
><P
> Fix missed permissions checks when a view contains a simple
<TT
CLASS="LITERAL"
>UNION ALL</TT
> construct (Heikki)
</P
><P
> Permissions for the referenced tables were checked properly, but not
permissions for the view itself.
</P
></LI
><LI
><P
> Add checks in executor startup to ensure that the tuples produced by an
<TT
CLASS="COMMAND"
>INSERT</TT
> or <TT
CLASS="COMMAND"
>UPDATE</TT
> will match the target table's
current rowtype (Tom)
</P
><P
> This situation is believed to be impossible in 8.3, but it can happen in
prior releases, so a check seems prudent.
</P
></LI
><LI
><P
> Fix possible repeated drops during <TT
CLASS="COMMAND"
>DROP OWNED</TT
> (Tom)
</P
><P
> This would typically result in strange errors such as <SPAN
CLASS="QUOTE"
>"cache
lookup failed for relation NNN"</SPAN
>.
</P
></LI
><LI
><P
> Fix several memory leaks in XML operations (Kris Jurka, Tom)
</P
></LI
><LI
><P
> Fix <CODE
CLASS="FUNCTION"
>xmlserialize()</CODE
> to raise error properly for
unacceptable target data type (Tom)
</P
></LI
><LI
><P
> Fix a couple of places that mis-handled multibyte characters in text
search configuration file parsing (Tom)
</P
><P
> Certain characters occurring in configuration files would always cause
<SPAN
CLASS="QUOTE"
>"invalid byte sequence for encoding"</SPAN
> failures.
</P
></LI
><LI
><P
> Provide file name and line number location for all errors reported
in text search configuration files (Tom)
</P
></LI
><LI
><P
> Fix <TT
CLASS="LITERAL"
>AT TIME ZONE</TT
> to first try to interpret its timezone
argument as a timezone abbreviation, and only try it as a full timezone
name if that fails, rather than the other way around as formerly (Tom)
</P
><P
> The timestamp input functions have always resolved ambiguous zone names
in this order. Making <TT
CLASS="LITERAL"
>AT TIME ZONE</TT
> do so as well improves
consistency, and fixes a compatibility bug introduced in 8.1:
in ambiguous cases we now behave the same as 8.0 and before did,
since in the older versions <TT
CLASS="LITERAL"
>AT TIME ZONE</TT
> accepted
<SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>only</I
></SPAN
> abbreviations.
</P
></LI
><LI
><P
> Fix datetime input functions to correctly detect integer overflow when
running on a 64-bit platform (Tom)
</P
></LI
><LI
><P
> Prevent integer overflows during units conversion when displaying a
configuration parameter that has units (Tom)
</P
></LI
><LI
><P
> Improve performance of writing very long log messages to syslog (Tom)
</P
></LI
><LI
><P
> Allow spaces in the suffix part of an LDAP URL in
<TT
CLASS="FILENAME"
>pg_hba.conf</TT
> (Tom)
</P
></LI
><LI
><P
> Fix bug in backwards scanning of a cursor on a <TT
CLASS="LITERAL"
>SELECT DISTINCT
ON</TT
> query (Tom)
</P
></LI
><LI
><P
> Fix planner bug that could improperly push down <TT
CLASS="LITERAL"
>IS NULL</TT
>
tests below an outer join (Tom)
</P
><P
> This was triggered by occurrence of <TT
CLASS="LITERAL"
>IS NULL</TT
> tests for
the same relation in all arms of an upper <TT
CLASS="LITERAL"
>OR</TT
> clause.
</P
></LI
><LI
><P
> Fix planner bug with nested sub-select expressions (Tom)
</P
><P
> If the outer sub-select has no direct dependency on the parent query,
but the inner one does, the outer value might not get recalculated
for new parent query rows.
</P
></LI
><LI
><P
> Fix planner to estimate that <TT
CLASS="LITERAL"
>GROUP BY</TT
> expressions yielding
boolean results always result in two groups, regardless of the
expressions' contents (Tom)
</P
><P
> This is very substantially more accurate than the regular <TT
CLASS="LITERAL"
>GROUP
BY</TT
> estimate for certain boolean tests like <TT
CLASS="REPLACEABLE"
><I
>col</I
></TT
>
<TT
CLASS="LITERAL"
>IS NULL</TT
>.
</P
></LI
><LI
><P
> Fix PL/pgSQL to not fail when a <TT
CLASS="LITERAL"
>FOR</TT
> loop's target variable
is a record containing composite-type fields (Tom)
</P
></LI
><LI
><P
> Fix PL/Tcl to behave correctly with Tcl 8.5, and to be more careful
about the encoding of data sent to or from Tcl (Tom)
</P
></LI
><LI
><P
> Improve performance of <CODE
CLASS="FUNCTION"
>PQescapeBytea()</CODE
> (Rudolf Leitgeb)
</P
></LI
><LI
><P
> On Windows, work around a Microsoft bug by preventing
<SPAN
CLASS="APPLICATION"
>libpq</SPAN
> from trying to send more than 64kB per system call
(Magnus)
</P
></LI
><LI
><P
> Fix <SPAN
CLASS="APPLICATION"
>ecpg</SPAN
> to handle variables properly in <TT
CLASS="COMMAND"
>SET</TT
>
commands (Michael)
</P
></LI
><LI
><P
> Improve <SPAN
CLASS="APPLICATION"
>pg_dump</SPAN
> and <SPAN
CLASS="APPLICATION"
>pg_restore</SPAN
>'s
error reporting after failure to send a SQL command (Tom)
</P
></LI
><LI
><P
> Fix <SPAN
CLASS="APPLICATION"
>pg_ctl</SPAN
> to properly preserve postmaster
command-line arguments across a <TT
CLASS="LITERAL"
>restart</TT
> (Bruce)
</P
></LI
><LI
><P
> Fix erroneous WAL file cutoff point calculation in
<SPAN
CLASS="APPLICATION"
>pg_standby</SPAN
> (Simon)
</P
></LI
><LI
><P
> Update time zone data files to <SPAN
CLASS="APPLICATION"
>tzdata</SPAN
> release 2008f (for
DST law changes in Argentina, Bahamas, Brazil, Mauritius, Morocco,
Pakistan, Palestine, and Paraguay)
</P
></LI
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