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>E.115. Release 8.3.6</A
></H1
><DIV
CLASS="FORMALPARA"
><P
><B
>Release date: </B
>2009-02-02</P
></DIV
><P
> This release contains a variety of fixes from 8.3.5.
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="AEN130668"
>E.115.1. Migration to Version 8.3.6</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 8.3.5,
see <A
HREF="release-8-3-5.html"
>Section E.116</A
>.
</P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN130672"
>E.115.2. Changes</A
></H2
><P
></P
><UL
><LI
><P
> Make <TT
CLASS="COMMAND"
>DISCARD ALL</TT
> release advisory locks, in addition
to everything it already did (Tom)
</P
><P
> This was decided to be the most appropriate behavior. This could
affect existing applications, however.
</P
></LI
><LI
><P
> Fix whole-index GiST scans to work correctly (Teodor)
</P
><P
> This error could cause rows to be lost if a table is clustered
on a GiST index.
</P
></LI
><LI
><P
> Fix crash of <TT
CLASS="LITERAL"
>xmlconcat(NULL)</TT
> (Peter)
</P
></LI
><LI
><P
> Fix possible crash in <TT
CLASS="LITERAL"
>ispell</TT
> dictionary if high-bit-set
characters are used as flags (Teodor)
</P
><P
> This is known to be done by one widely available Norwegian dictionary,
and the same condition may exist in others.
</P
></LI
><LI
><P
> Fix misordering of <SPAN
CLASS="APPLICATION"
>pg_dump</SPAN
> output for composite types
(Tom)
</P
><P
> The most likely problem was for user-defined operator classes to
be dumped after indexes or views that needed them.
</P
></LI
><LI
><P
> Improve handling of URLs in <CODE
CLASS="FUNCTION"
>headline()</CODE
> function (Teodor)
</P
></LI
><LI
><P
> Improve handling of overlength headlines in <CODE
CLASS="FUNCTION"
>headline()</CODE
>
function (Teodor)
</P
></LI
><LI
><P
> Prevent possible Assert failure or misconversion if an encoding
conversion is created with the wrong conversion function for the
specified pair of encodings (Tom, Heikki)
</P
></LI
><LI
><P
> Fix possible Assert failure if a statement executed in PL/pgSQL is
rewritten into another kind of statement, for example if an
<TT
CLASS="COMMAND"
>INSERT</TT
> is rewritten into an <TT
CLASS="COMMAND"
>UPDATE</TT
> (Heikki)
</P
></LI
><LI
><P
> Ensure that a snapshot is available to datatype input functions (Tom)
</P
><P
> This primarily affects domains that are declared with <TT
CLASS="LITERAL"
>CHECK</TT
>
constraints involving user-defined stable or immutable functions. Such
functions typically fail if no snapshot has been set.
</P
></LI
><LI
><P
> Make it safer for SPI-using functions to be used within datatype I/O;
in particular, to be used in domain check constraints (Tom)
</P
></LI
><LI
><P
> Avoid unnecessary locking of small tables in <TT
CLASS="COMMAND"
>VACUUM</TT
>
(Heikki)
</P
></LI
><LI
><P
> Fix a problem that sometimes kept <TT
CLASS="COMMAND"
>ALTER TABLE ENABLE/DISABLE
RULE</TT
> from being recognized by active sessions (Tom)
</P
></LI
><LI
><P
> Fix a problem that made <TT
CLASS="LITERAL"
>UPDATE RETURNING tableoid</TT
>
return zero instead of the correct OID (Tom)
</P
></LI
><LI
><P
> Allow functions declared as taking <TT
CLASS="TYPE"
>ANYARRAY</TT
> to work on
the <TT
CLASS="STRUCTNAME"
>pg_statistic</TT
> columns of that type (Tom)
</P
><P
> This used to work, but was unintentionally broken in 8.3.
</P
></LI
><LI
><P
> Fix planner misestimation of selectivity when transitive equality
is applied to an outer-join clause (Tom)
</P
><P
> This could result in bad plans for queries like
<TT
CLASS="LITERAL"
>... from a left join b on a.a1 = b.b1 where a.a1 = 42 ...</TT
>
</P
></LI
><LI
><P
> Improve optimizer's handling of long <TT
CLASS="LITERAL"
>IN</TT
> lists (Tom)
</P
><P
> This change avoids wasting large amounts of time on such lists
when constraint exclusion is enabled.
</P
></LI
><LI
><P
> Prevent synchronous scan during GIN index build (Tom)
</P
><P
> Because GIN is optimized for inserting tuples in increasing TID order,
choosing to use a synchronous scan could slow the build by a factor of
three or more.
</P
></LI
><LI
><P
> Ensure that the contents of a holdable cursor don't depend on the
contents of TOAST tables (Tom)
</P
><P
> Previously, large field values in a cursor result might be represented
as TOAST pointers, which would fail if the referenced table got dropped
before the cursor is read, or if the large value is deleted and then
vacuumed away. This cannot happen with an ordinary cursor,
but it could with a cursor that is held past its creating transaction.
</P
></LI
><LI
><P
> Fix memory leak when a set-returning function is terminated without
reading its whole result (Tom)
</P
></LI
><LI
><P
> Fix encoding conversion problems in XML functions when the database
encoding isn't UTF-8 (Tom)
</P
></LI
><LI
><P
> Fix <TT
CLASS="FILENAME"
>contrib/dblink</TT
>'s
<CODE
CLASS="FUNCTION"
>dblink_get_result(text,bool)</CODE
> function (Joe)
</P
></LI
><LI
><P
> Fix possible garbage output from <TT
CLASS="FILENAME"
>contrib/sslinfo</TT
> functions
(Tom)
</P
></LI
><LI
><P
> Fix incorrect behavior of <TT
CLASS="FILENAME"
>contrib/tsearch2</TT
> compatibility
trigger when it's fired more than once in a command (Teodor)
</P
></LI
><LI
><P
> Fix possible mis-signaling in autovacuum (Heikki)
</P
></LI
><LI
><P
> Support running as a service on Windows 7 beta (Dave and Magnus)
</P
></LI
><LI
><P
> Fix <SPAN
CLASS="APPLICATION"
>ecpg</SPAN
>'s handling of varchar structs (Michael)
</P
></LI
><LI
><P
> Fix <SPAN
CLASS="APPLICATION"
>configure</SPAN
> script to properly report failure when
unable to obtain linkage information for PL/Perl (Andrew)
</P
></LI
><LI
><P
> Make all documentation reference <TT
CLASS="LITERAL"
>pgsql-bugs</TT
> and/or
<TT
CLASS="LITERAL"
>pgsql-hackers</TT
> as appropriate, instead of the
now-decommissioned <TT
CLASS="LITERAL"
>pgsql-ports</TT
> and <TT
CLASS="LITERAL"
>pgsql-patches</TT
>
mailing lists (Tom)
</P
></LI
><LI
><P
> Update time zone data files to <SPAN
CLASS="APPLICATION"
>tzdata</SPAN
> release 2009a (for
Kathmandu and historical DST corrections in Switzerland, Cuba)
</P
></LI
></UL
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