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>Appendix E. Release Notes</TD
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><A
NAME="RELEASE-8-2-7"
>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
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><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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