A fix is available
APAR status
Closed as program error.
Error description
Performance improvment for XML query with XMLAGG.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: DB2 R910 users who use XMLQUERY with XMLAGG * **************************************************************** * PROBLEM DESCRIPTION: The performance improvement of reducing * * the number of sorts and merges while * * handling XML sequences might not be * * applied when combining XMLQUERY with * * XMLAGG functions in a query. * **************************************************************** * RECOMMENDATION: * **************************************************************** The performance improvement of reducing the number of sorts and merges while handling XML sequences might not be applied when combining XMLQUERY with XMLAGG functions in a query. For example: Following query combines XMLQUERY with XMLAGG. SELECT XMLQUERY( 'fn:count($x//students/student/classes/class)' passing XMLAGG(college_student_teacher_xml) as "x") FROM college_XML; The performance improvement might not be applied to this query.
Problem conclusion
DB2 is modified to check for this condition and apply the performance improvement.
Temporary fix
Comments
APAR Information
APAR number
PK57786
Reported component name
DB2 OS/390 & Z/
Reported component ID
5740XYR00
Reported release
910
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2007-12-06
Closed date
2008-01-17
Last modified date
2008-03-03
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UK33048
Modules/Macros
DSNNQSCN
Fix information
Fixed component name
DB2 OS/390 & Z/
Fixed component ID
5740XYR00
Applicable component levels
R910 PSY UK33048
UP08/02/04 P F802
Fix is available
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Document Information
Modified date:
03 March 2008