APAR status
Closed as program error.
Error description
You have done migration or upgrade from v10 to v11.50 and above and you noticed that certain multi-table queries are being executed slower than on Informix v10. You have inspected the query plans and noticed that on new version of Informix the optimizer is processing tables in the order different than on v10. For example: v10: tab1 -> tab2 -> join.. v11.50 and above: tab2 -> tab1 -> join...
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: * * All 11.70 and 12.10 users. * **************************************************************** * PROBLEM DESCRIPTION: * * A query may have suboptimal query plan under the following * * conditions: * * - a correlated subquery exists * * - a cartesian join is performed between 2 tables * * - one of the tables involved in cartesian join is * * performing an index scan with table filters * **************************************************************** * RECOMMENDATION: * * Update to IDS-11.70.xC8 * ****************************************************************
Problem conclusion
Problem Fixed In IDS-11.70.xC8
Temporary fix
Comments
APAR Information
APAR number
IC95034
Reported component name
INFORMIX SERVER
Reported component ID
5725A3900
Reported release
C10
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2013-08-20
Closed date
2014-02-26
Last modified date
2014-02-26
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
INFORMIX SERVER
Fixed component ID
5725A3900
Applicable component levels
RB70 PSN
UP
RC10 PSN
UP
[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSGU8G","label":"Informix Servers"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"C10","Edition":"","Line of Business":{"code":"LOB10","label":"Data and AI"}}]
Document Information
Modified date:
26 February 2014