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>E.79. Release 8.4.18</A
></H1
><DIV
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><P
><B
>Release date: </B
>2013-10-10</P
></DIV
><P
> This release contains a variety of fixes from 8.4.17.
For information about new features in the 8.4 major release, see
<A
HREF="release-8-4.html"
>Section E.97</A
>.
</P
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>E.79.1. Migration to Version 8.4.18</A
></H2
><P
> A dump/restore is not required for those running 8.4.X.
</P
><P
> However, if you are upgrading from a version earlier than 8.4.17,
see <A
HREF="release-8-4-17.html"
>Section E.80</A
>.
</P
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><H2
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><A
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>E.79.2. Changes</A
></H2
><P
></P
><UL
><LI
><P
> Prevent corruption of multi-byte characters when attempting to
case-fold identifiers (Andrew Dunstan)
</P
><P
> <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> case-folds non-ASCII characters only
when using a single-byte server encoding.
</P
></LI
><LI
><P
> Fix memory leak caused by <CODE
CLASS="FUNCTION"
>lo_open()</CODE
> failure
(Heikki Linnakangas)
</P
></LI
><LI
><P
> Fix memory overcommit bug when <TT
CLASS="VARNAME"
>work_mem</TT
> is using more
than 24GB of memory (Stephen Frost)
</P
></LI
><LI
><P
> Fix deadlock bug in libpq when using SSL (Stephen Frost)
</P
></LI
><LI
><P
> Properly compute row estimates for boolean columns containing many NULL
values (Andrew Gierth)
</P
><P
> Previously tests like <TT
CLASS="LITERAL"
>col IS NOT TRUE</TT
> and <TT
CLASS="LITERAL"
>col IS
NOT FALSE</TT
> did not properly factor in NULL values when estimating
plan costs.
</P
></LI
><LI
><P
> Prevent pushing down <TT
CLASS="LITERAL"
>WHERE</TT
> clauses into unsafe
<TT
CLASS="LITERAL"
>UNION/INTERSECT</TT
> subqueries (Tom Lane)
</P
><P
> Subqueries of a <TT
CLASS="LITERAL"
>UNION</TT
> or <TT
CLASS="LITERAL"
>INTERSECT</TT
> that
contain set-returning functions or volatile functions in their
<TT
CLASS="LITERAL"
>SELECT</TT
> lists could be improperly optimized, leading to
run-time errors or incorrect query results.
</P
></LI
><LI
><P
> Fix rare case of <SPAN
CLASS="QUOTE"
>"failed to locate grouping columns"</SPAN
>
planner failure (Tom Lane)
</P
></LI
><LI
><P
> Improve view dumping code's handling of dropped columns in referenced
tables (Tom Lane)
</P
></LI
><LI
><P
> Fix possible deadlock during concurrent <TT
CLASS="COMMAND"
>CREATE INDEX
CONCURRENTLY</TT
> operations (Tom Lane)
</P
></LI
><LI
><P
> Fix <CODE
CLASS="FUNCTION"
>regexp_matches()</CODE
> handling of zero-length matches
(Jeevan Chalke)
</P
><P
> Previously, zero-length matches like '^' could return too many matches.
</P
></LI
><LI
><P
> Fix crash for overly-complex regular expressions (Heikki Linnakangas)
</P
></LI
><LI
><P
> Fix regular expression match failures for back references combined with
non-greedy quantifiers (Jeevan Chalke)
</P
></LI
><LI
><P
> Prevent <TT
CLASS="COMMAND"
>CREATE FUNCTION</TT
> from checking <TT
CLASS="COMMAND"
>SET</TT
>
variables unless function body checking is enabled (Tom Lane)
</P
></LI
><LI
><P
> Fix <CODE
CLASS="FUNCTION"
>pgp_pub_decrypt()</CODE
> so it works for secret keys with
passwords (Marko Kreen)
</P
></LI
><LI
><P
> Remove rare inaccurate warning during vacuum of index-less tables
(Heikki Linnakangas)
</P
></LI
><LI
><P
> Avoid possible failure when performing transaction control commands (e.g
<TT
CLASS="COMMAND"
>ROLLBACK</TT
>) in prepared queries (Tom Lane)
</P
></LI
><LI
><P
> Ensure that floating-point data input accepts standard spellings
of <SPAN
CLASS="QUOTE"
>"infinity"</SPAN
> on all platforms (Tom Lane)
</P
><P
> The C99 standard says that allowable spellings are <TT
CLASS="LITERAL"
>inf</TT
>,
<TT
CLASS="LITERAL"
>+inf</TT
>, <TT
CLASS="LITERAL"
>-inf</TT
>, <TT
CLASS="LITERAL"
>infinity</TT
>,
<TT
CLASS="LITERAL"
>+infinity</TT
>, and <TT
CLASS="LITERAL"
>-infinity</TT
>. Make sure we
recognize these even if the platform's <CODE
CLASS="FUNCTION"
>strtod</CODE
> function
doesn't.
</P
></LI
><LI
><P
> Expand ability to compare rows to records and arrays (Rafal Rzepecki,
Tom Lane)
</P
></LI
><LI
><P
> Update time zone data files to <SPAN
CLASS="APPLICATION"
>tzdata</SPAN
> release 2013d
for DST law changes in Israel, Morocco, Palestine, and Paraguay.
Also, historical zone data corrections for Macquarie Island.
</P
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