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><A
NAME="RELEASE-8-4-12"
>E.85. Release 8.4.12</A
></H1
><DIV
CLASS="FORMALPARA"
><P
><B
>Release date: </B
>2012-06-04</P
></DIV
><P
> This release contains a variety of fixes from 8.4.11.
For information about new features in the 8.4 major release, see
<A
HREF="release-8-4.html"
>Section E.97</A
>.
</P
><DIV
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><H2
CLASS="SECT2"
><A
NAME="AEN125810"
>E.85.1. Migration to Version 8.4.12</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 8.4.10,
see <A
HREF="release-8-4-10.html"
>Section E.87</A
>.
</P
></DIV
><DIV
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><H2
CLASS="SECT2"
><A
NAME="AEN125815"
>E.85.2. Changes</A
></H2
><P
></P
><UL
><LI
><P
> Fix incorrect password transformation in
<TT
CLASS="FILENAME"
>contrib/pgcrypto</TT
>'s DES <CODE
CLASS="FUNCTION"
>crypt()</CODE
> function
(Solar Designer)
</P
><P
> If a password string contained the byte value <TT
CLASS="LITERAL"
>0x80</TT
>, the
remainder of the password was ignored, causing the password to be much
weaker than it appeared. With this fix, the rest of the string is
properly included in the DES hash. Any stored password values that are
affected by this bug will thus no longer match, so the stored values may
need to be updated. (CVE-2012-2143)
</P
></LI
><LI
><P
> Ignore <TT
CLASS="LITERAL"
>SECURITY DEFINER</TT
> and <TT
CLASS="LITERAL"
>SET</TT
> attributes for
a procedural language's call handler (Tom Lane)
</P
><P
> Applying such attributes to a call handler could crash the server.
(CVE-2012-2655)
</P
></LI
><LI
><P
> Allow numeric timezone offsets in <TT
CLASS="TYPE"
>timestamp</TT
> input to be up to
16 hours away from UTC (Tom Lane)
</P
><P
> Some historical time zones have offsets larger than 15 hours, the
previous limit. This could result in dumped data values being rejected
during reload.
</P
></LI
><LI
><P
> Fix timestamp conversion to cope when the given time is exactly the
last DST transition time for the current timezone (Tom Lane)
</P
><P
> This oversight has been there a long time, but was not noticed
previously because most DST-using zones are presumed to have an
indefinite sequence of future DST transitions.
</P
></LI
><LI
><P
> Fix <TT
CLASS="TYPE"
>text</TT
> to <TT
CLASS="TYPE"
>name</TT
> and <TT
CLASS="TYPE"
>char</TT
> to <TT
CLASS="TYPE"
>name</TT
>
casts to perform string truncation correctly in multibyte encodings
(Karl Schnaitter)
</P
></LI
><LI
><P
> Fix memory copying bug in <CODE
CLASS="FUNCTION"
>to_tsquery()</CODE
> (Heikki Linnakangas)
</P
></LI
><LI
><P
> Fix planner's handling of outer PlaceHolderVars within subqueries (Tom
Lane)
</P
><P
> This bug concerns sub-SELECTs that reference variables coming from the
nullable side of an outer join of the surrounding query.
In 9.1, queries affected by this bug would fail with <SPAN
CLASS="QUOTE"
>"ERROR:
Upper-level PlaceHolderVar found where not expected"</SPAN
>. But in 9.0 and
8.4, you'd silently get possibly-wrong answers, since the value
transmitted into the subquery wouldn't go to null when it should.
</P
></LI
><LI
><P
> Fix slow session startup when <TT
CLASS="STRUCTNAME"
>pg_attribute</TT
> is very large
(Tom Lane)
</P
><P
> If <TT
CLASS="STRUCTNAME"
>pg_attribute</TT
> exceeds one-fourth of
<TT
CLASS="VARNAME"
>shared_buffers</TT
>, cache rebuilding code that is sometimes
needed during session start would trigger the synchronized-scan logic,
causing it to take many times longer than normal. The problem was
particularly acute if many new sessions were starting at once.
</P
></LI
><LI
><P
> Ensure sequential scans check for query cancel reasonably often (Merlin
Moncure)
</P
><P
> A scan encountering many consecutive pages that contain no live tuples
would not respond to interrupts meanwhile.
</P
></LI
><LI
><P
> Ensure the Windows implementation of <CODE
CLASS="FUNCTION"
>PGSemaphoreLock()</CODE
>
clears <TT
CLASS="VARNAME"
>ImmediateInterruptOK</TT
> before returning (Tom Lane)
</P
><P
> This oversight meant that a query-cancel interrupt received later
in the same query could be accepted at an unsafe time, with
unpredictable but not good consequences.
</P
></LI
><LI
><P
> Show whole-row variables safely when printing views or rules
(Abbas Butt, Tom Lane)
</P
><P
> Corner cases involving ambiguous names (that is, the name could be
either a table or column name of the query) were printed in an
ambiguous way, risking that the view or rule would be interpreted
differently after dump and reload. Avoid the ambiguous case by
attaching a no-op cast.
</P
></LI
><LI
><P
> Fix <TT
CLASS="COMMAND"
>COPY FROM</TT
> to properly handle null marker strings that
correspond to invalid encoding (Tom Lane)
</P
><P
> A null marker string such as <TT
CLASS="LITERAL"
>E'\\0'</TT
> should work, and did
work in the past, but the case got broken in 8.4.
</P
></LI
><LI
><P
> Ensure autovacuum worker processes perform stack depth checking
properly (Heikki Linnakangas)
</P
><P
> Previously, infinite recursion in a function invoked by
auto-<TT
CLASS="COMMAND"
>ANALYZE</TT
> could crash worker processes.
</P
></LI
><LI
><P
> Fix logging collector to not lose log coherency under high load (Andrew
Dunstan)
</P
><P
> The collector previously could fail to reassemble large messages if it
got too busy.
</P
></LI
><LI
><P
> Fix logging collector to ensure it will restart file rotation
after receiving <SPAN
CLASS="SYSTEMITEM"
>SIGHUP</SPAN
> (Tom Lane)
</P
></LI
><LI
><P
> Fix WAL replay logic for GIN indexes to not fail if the index was
subsequently dropped (Tom Lane)
</P
></LI
><LI
><P
> Fix memory leak in PL/pgSQL's <TT
CLASS="COMMAND"
>RETURN NEXT</TT
> command (Joe
Conway)
</P
></LI
><LI
><P
> Fix PL/pgSQL's <TT
CLASS="COMMAND"
>GET DIAGNOSTICS</TT
> command when the target
is the function's first variable (Tom Lane)
</P
></LI
><LI
><P
> Fix potential access off the end of memory in <SPAN
CLASS="APPLICATION"
>psql</SPAN
>'s
expanded display (<TT
CLASS="COMMAND"
>\x</TT
>) mode (Peter Eisentraut)
</P
></LI
><LI
><P
> Fix several performance problems in <SPAN
CLASS="APPLICATION"
>pg_dump</SPAN
> when
the database contains many objects (Jeff Janes, Tom Lane)
</P
><P
> <SPAN
CLASS="APPLICATION"
>pg_dump</SPAN
> could get very slow if the database contained
many schemas, or if many objects are in dependency loops, or if there
are many owned sequences.
</P
></LI
><LI
><P
> Fix <TT
CLASS="FILENAME"
>contrib/dblink</TT
>'s <CODE
CLASS="FUNCTION"
>dblink_exec()</CODE
> to not leak
temporary database connections upon error (Tom Lane)
</P
></LI
><LI
><P
> Fix <TT
CLASS="FILENAME"
>contrib/dblink</TT
> to report the correct connection name in
error messages (Kyotaro Horiguchi)
</P
></LI
><LI
><P
> Update time zone data files to <SPAN
CLASS="APPLICATION"
>tzdata</SPAN
> release 2012c
for DST law changes in Antarctica, Armenia, Chile, Cuba, Falkland
Islands, Gaza, Haiti, Hebron, Morocco, Syria, and Tokelau Islands;
also historical corrections for Canada.
</P
></LI
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