Fixes are available
DB2 Version 9.5 Fix Pack 3b for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 1 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 2a for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 2 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 4 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 3a for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 3 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 4a for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 5 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 6a for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 7 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 8 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 9 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 10 for Linux, UNIX, and Windows
APAR status
Closed as program error.
Error description
For a query involving a Union all between different tables, the predicates pushdown will not happen during query rewrite when there is a correlated subquery to the tables (such as subqueries after a EXISTS or NOT EXISTS clause).
Local fix
Problem summary
Users affected = Users having Union all queries with correlated subqueries Problem Description = Poor query performance due to inadequate query access plan generated by the db2 optimizer for union all queries with correlated subqueries (predicate pushdown not happening).
Problem conclusion
Problem first fixed in V9.5, Fixpak 1
Temporary fix
Comments
APAR Information
APAR number
IZ08760
Reported component name
DB2 UDB WSE AIX
Reported component ID
5765F3500
Reported release
950
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2007-11-14
Closed date
2008-05-09
Last modified date
2008-05-09
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
DB2 UDB WSE AIX
Fixed component ID
5765F3500
Applicable component levels
R810 PSN
UP
R820 PSN
UP
R910 PSN
UP
R950 PSN
UP
Document Information
Modified date:
09 May 2008