APAR status
Closed as program error.
Error description
Running update statistics medium and high results in a much slower query plan than running update statistics low or drop distributions only. This defect is also seen in 10.00.XC8.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: * * All users * **************************************************************** * PROBLEM DESCRIPTION: * * A query with a join filter using column subscripts ( eg. * * tab1.col1[1] = tab2.col1) may select a poorly performing * * query plan. This is because the optimizer is incorrectly * * using complete column statistics to estimate selectivity for * * a subscripted column. * **************************************************************** * RECOMMENDATION: * * Upgrade to 11.50.xC9 or higher. * ****************************************************************
Problem conclusion
The problem has been fixed in 11.50.xC9.
Temporary fix
Comments
APAR Information
APAR number
IC73991
Reported component name
IBM IDS ENTRP E
Reported component ID
5724L2304
Reported release
B15
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2011-01-19
Closed date
2011-09-27
Last modified date
2011-09-27
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
IBM IDS ENTRP E
Fixed component ID
5724L2304
Applicable component levels
RB15 PSN
UP
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Document Information
Modified date:
27 September 2011