Release date: 2011-01-31
This release contains a variety of fixes from 8.4.6. For information about new features in the 8.4 major release, see Section E.154.
A dump/restore is not required for those running 8.4.X. However, if you are upgrading from a version earlier than 8.4.2, see Section E.152.
Avoid failures when EXPLAIN
tries to display a simple-form
CASE
expression (Tom Lane)
If the CASE
's test expression was a constant, the planner
could simplify the CASE
into a form that confused the
expression-display code, resulting in “unexpected CASE WHEN
clause” errors.
Fix assignment to an array slice that is before the existing range of subscripts (Tom Lane)
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.
Avoid unexpected conversion overflow in planner for very distant date values (Tom Lane)
The date
type supports a wider range of dates than can be
represented by the timestamp
types, but the planner assumed it
could always convert a date to timestamp with impunity.
Fix pg_restore's text output for large objects (BLOBs)
when standard_conforming_strings
is on (Tom Lane)
Although restoring directly to a database worked correctly, string
escaping was incorrect if pg_restore was asked for
SQL text output and standard_conforming_strings
had been
enabled in the source database.
Fix erroneous parsing of tsquery
values containing
... & !(subexpression) | ...
(Tom Lane)
Queries containing this combination of operators were not executed
correctly. The same error existed in contrib/intarray
's
query_int
type and contrib/ltree
's
ltxtquery
type.
Fix buffer overrun in contrib/intarray
's input function
for the query_int
type (Apple)
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)
Fix bug in contrib/seg
's GiST picksplit algorithm
(Alexander Korotkov)
This could result in considerable inefficiency, though not actually
incorrect answers, in a GiST index on a seg
column.
If you have such an index, consider REINDEX
ing it after
installing this update. (This is identical to the bug that was fixed in
contrib/cube
in the previous update.)