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>E.125. Release 8.2.20</A
></H1
><DIV
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><P
><B
>Release date: </B
>2011-01-31</P
></DIV
><P
> This release contains a variety of fixes from 8.2.19.
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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><A
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>E.125.1. Migration to Version 8.2.20</A
></H2
><P
> A dump/restore is not required for those running 8.2.X.
However, if you are upgrading from a version earlier than 8.2.14,
see <A
HREF="release-8-2-14.html"
>Section E.131</A
>.
</P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN132705"
>E.125.2. Changes</A
></H2
><P
></P
><UL
><LI
><P
> Avoid failures when <TT
CLASS="COMMAND"
>EXPLAIN</TT
> tries to display a simple-form
<TT
CLASS="LITERAL"
>CASE</TT
> expression (Tom Lane)
</P
><P
> If the <TT
CLASS="LITERAL"
>CASE</TT
>'s test expression was a constant, the planner
could simplify the <TT
CLASS="LITERAL"
>CASE</TT
> into a form that confused the
expression-display code, resulting in <SPAN
CLASS="QUOTE"
>"unexpected CASE WHEN
clause"</SPAN
> errors.
</P
></LI
><LI
><P
> Fix assignment to an array slice that is before the existing range
of subscripts (Tom Lane)
</P
><P
> If there was a gap between the newly added subscripts and the first
pre-existing subscript, the code miscalculated how many entries needed
to be copied from the old array's null bitmap, potentially leading to
data corruption or crash.
</P
></LI
><LI
><P
> Avoid unexpected conversion overflow in planner for very distant date
values (Tom Lane)
</P
><P
> The <TT
CLASS="TYPE"
>date</TT
> type supports a wider range of dates than can be
represented by the <TT
CLASS="TYPE"
>timestamp</TT
> types, but the planner assumed it
could always convert a date to timestamp with impunity.
</P
></LI
><LI
><P
> Fix <SPAN
CLASS="APPLICATION"
>pg_restore</SPAN
>'s text output for large objects (BLOBs)
when <TT
CLASS="VARNAME"
>standard_conforming_strings</TT
> is on (Tom Lane)
</P
><P
> Although restoring directly to a database worked correctly, string
escaping was incorrect if <SPAN
CLASS="APPLICATION"
>pg_restore</SPAN
> was asked for
SQL text output and <TT
CLASS="VARNAME"
>standard_conforming_strings</TT
> had been
enabled in the source database.
</P
></LI
><LI
><P
> Fix erroneous parsing of <TT
CLASS="TYPE"
>tsquery</TT
> values containing
<TT
CLASS="LITERAL"
>... & !(subexpression) | ...</TT
> (Tom Lane)
</P
><P
> Queries containing this combination of operators were not executed
correctly. The same error existed in <TT
CLASS="FILENAME"
>contrib/intarray</TT
>'s
<TT
CLASS="TYPE"
>query_int</TT
> type and <TT
CLASS="FILENAME"
>contrib/ltree</TT
>'s
<TT
CLASS="TYPE"
>ltxtquery</TT
> type.
</P
></LI
><LI
><P
> Fix buffer overrun in <TT
CLASS="FILENAME"
>contrib/intarray</TT
>'s input function
for the <TT
CLASS="TYPE"
>query_int</TT
> type (Apple)
</P
><P
> This bug is a security risk since the function's return address could
be overwritten. Thanks to Apple Inc's security team for reporting this
issue and supplying the fix. (CVE-2010-4015)
</P
></LI
><LI
><P
> Fix bug in <TT
CLASS="FILENAME"
>contrib/seg</TT
>'s GiST picksplit algorithm
(Alexander Korotkov)
</P
><P
> This could result in considerable inefficiency, though not actually
incorrect answers, in a GiST index on a <TT
CLASS="TYPE"
>seg</TT
> column.
If you have such an index, consider <TT
CLASS="COMMAND"
>REINDEX</TT
>ing it after
installing this update. (This is identical to the bug that was fixed in
<TT
CLASS="FILENAME"
>contrib/cube</TT
> in the previous update.)
</P
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