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>Appendix E. Release Notes</TD
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>E.138. Release 8.2.7</A
></H1
><DIV
CLASS="FORMALPARA"
><P
><B
>Release date: </B
>2008-03-17</P
></DIV
><P
> This release contains a variety of fixes from 8.2.6.
For information about new features in the 8.2 major release, see
<A
HREF="release-8-2.html"
>Section E.145</A
>.
</P
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN133739"
>E.138.1. Migration to Version 8.2.7</A
></H2
><P
> A dump/restore is not required for those running 8.2.X.
However, you might need to <TT
CLASS="COMMAND"
>REINDEX</TT
> indexes on textual
columns after updating, if you are affected by the Windows locale
issue described below.
</P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN133743"
>E.138.2. Changes</A
></H2
><P
></P
><UL
><LI
><P
> Fix character string comparison for Windows locales that consider
different character combinations as equal (Tom)
</P
><P
> This fix applies only on Windows and only when using UTF-8
database encoding. The same fix was made for all other cases
over two years ago, but Windows with UTF-8 uses a separate code
path that was not updated. If you are using a locale that
considers some non-identical strings as equal, you may need to
<TT
CLASS="COMMAND"
>REINDEX</TT
> to fix existing indexes on textual columns.
</P
></LI
><LI
><P
> Repair potential deadlock between concurrent <TT
CLASS="COMMAND"
>VACUUM FULL</TT
>
operations on different system catalogs (Tom)
</P
></LI
><LI
><P
> Fix longstanding <TT
CLASS="COMMAND"
>LISTEN</TT
>/<TT
CLASS="COMMAND"
>NOTIFY</TT
>
race condition (Tom)
</P
><P
> In rare cases a session that had just executed a
<TT
CLASS="COMMAND"
>LISTEN</TT
> might not get a notification, even though
one would be expected because the concurrent transaction executing
<TT
CLASS="COMMAND"
>NOTIFY</TT
> was observed to commit later.
</P
><P
> A side effect of the fix is that a transaction that has executed
a not-yet-committed <TT
CLASS="COMMAND"
>LISTEN</TT
> command will not see any
row in <TT
CLASS="STRUCTNAME"
>pg_listener</TT
> for the <TT
CLASS="COMMAND"
>LISTEN</TT
>,
should it choose to look; formerly it would have. This behavior
was never documented one way or the other, but it is possible that
some applications depend on the old behavior.
</P
></LI
><LI
><P
> Disallow <TT
CLASS="COMMAND"
>LISTEN</TT
> and <TT
CLASS="COMMAND"
>UNLISTEN</TT
> within a
prepared transaction (Tom)
</P
><P
> This was formerly allowed but trying to do it had various unpleasant
consequences, notably that the originating backend could not exit
as long as an <TT
CLASS="COMMAND"
>UNLISTEN</TT
> remained uncommitted.
</P
></LI
><LI
><P
> Disallow dropping a temporary table within a
prepared transaction (Heikki)
</P
><P
> This was correctly disallowed by 8.1, but the check was inadvertently
broken in 8.2.
</P
></LI
><LI
><P
> Fix rare crash when an error occurs during a query using a hash index
(Heikki)
</P
></LI
><LI
><P
> Fix memory leaks in certain usages of set-returning functions (Neil)
</P
></LI
><LI
><P
> Fix input of datetime values for February 29 in years BC (Tom)
</P
><P
> The former coding was mistaken about which years were leap years.
</P
></LI
><LI
><P
> Fix <SPAN
CLASS="QUOTE"
>"unrecognized node type"</SPAN
> error in some variants of
<TT
CLASS="COMMAND"
>ALTER OWNER</TT
> (Tom)
</P
></LI
><LI
><P
> Ensure <TT
CLASS="STRUCTNAME"
>pg_stat_activity</TT
>.<TT
CLASS="STRUCTFIELD"
>waiting</TT
> flag
is cleared when a lock wait is aborted (Tom)
</P
></LI
><LI
><P
> Fix handling of process permissions on Windows Vista (Dave, Magnus)
</P
><P
> In particular, this fix allows starting the server as the Administrator
user.
</P
></LI
><LI
><P
> Update time zone data files to <SPAN
CLASS="APPLICATION"
>tzdata</SPAN
> release 2008a
(in particular, recent Chile changes); adjust timezone abbreviation
<TT
CLASS="LITERAL"
>VET</TT
> (Venezuela) to mean UTC-4:30, not UTC-4:00 (Tom)
</P
></LI
><LI
><P
> Fix <SPAN
CLASS="APPLICATION"
>pg_ctl</SPAN
> to correctly extract the postmaster's port
number from command-line options (Itagaki Takahiro, Tom)
</P
><P
> Previously, <TT
CLASS="LITERAL"
>pg_ctl start -w</TT
> could try to contact the
postmaster on the wrong port, leading to bogus reports of startup
failure.
</P
></LI
><LI
><P
> Use <TT
CLASS="OPTION"
>-fwrapv</TT
> to defend against possible misoptimization
in recent <SPAN
CLASS="APPLICATION"
>gcc</SPAN
> versions (Tom)
</P
><P
> This is known to be necessary when building <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
>
with <SPAN
CLASS="APPLICATION"
>gcc</SPAN
> 4.3 or later.
</P
></LI
><LI
><P
> Correctly enforce <TT
CLASS="VARNAME"
>statement_timeout</TT
> values longer
than <TT
CLASS="LITERAL"
>INT_MAX</TT
> microseconds (about 35 minutes) (Tom)
</P
><P
> This bug affects only builds with <TT
CLASS="OPTION"
>--enable-integer-datetimes</TT
>.
</P
></LI
><LI
><P
> Fix <SPAN
CLASS="QUOTE"
>"unexpected PARAM_SUBLINK ID"</SPAN
> planner error when
constant-folding simplifies a sub-select (Tom)
</P
></LI
><LI
><P
> Fix logical errors in constraint-exclusion handling of <TT
CLASS="LITERAL"
>IS
NULL</TT
> and <TT
CLASS="LITERAL"
>NOT</TT
> expressions (Tom)
</P
><P
> The planner would sometimes exclude partitions that should not
have been excluded because of the possibility of NULL results.
</P
></LI
><LI
><P
> Fix another cause of <SPAN
CLASS="QUOTE"
>"failed to build any N-way joins"</SPAN
>
planner errors (Tom)
</P
><P
> This could happen in cases where a clauseless join needed to be
forced before a join clause could be exploited.
</P
></LI
><LI
><P
> Fix incorrect constant propagation in outer-join planning (Tom)
</P
><P
> The planner could sometimes incorrectly conclude that a variable
could be constrained to be equal to a constant, leading
to wrong query results.
</P
></LI
><LI
><P
> Fix display of constant expressions in <TT
CLASS="LITERAL"
>ORDER BY</TT
>
and <TT
CLASS="LITERAL"
>GROUP BY</TT
> (Tom)
</P
><P
> An explicitly casted constant would be shown incorrectly. This could
for example lead to corruption of a view definition during
dump and reload.
</P
></LI
><LI
><P
> Fix <SPAN
CLASS="APPLICATION"
>libpq</SPAN
> to handle NOTICE messages correctly
during COPY OUT (Tom)
</P
><P
> This failure has only been observed to occur when a user-defined
datatype's output routine issues a NOTICE, but there is no
guarantee it couldn't happen due to other causes.
</P
></LI
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