MA48804 - OSP-DB-OTHER-F/DBOPAFFINITY-T/QQQOOODBOP-RC1720-MSGMCH3203
RUNNING A SELECT WITH GROUPINGSETS AND ALWCPYDTA YES

Abstract

OSP-DB-OTHER-F/DBOPAFFINITY-T/QQQOOODBOP-RC1720-MSGMCH3203
RUNNING A SELECT WITH GROUPINGSETS AND ALWCPYDTA YES

Error Description

A CTE with aggregation, join and union and grouping sets fails  
with                                                            
msgMCH3203 x/1720 f/dbopaffinity                                
t/qqqooodbop-qqqoooinv-calldbmaintforopenoroptimize            
if executed with ALWCPYDTA set to *YES                          

Problem Summary

A CTE with aggregation, join and union and grouping sets fails  
with                                                            
msgMCH3203 x/1720 f/dbopaffinity                                
t/qqqooodbop-qqqoooinv-calldbmaintforopenoroptimize            
if executed with ALWCPYDTA set to *YES                          

Problem Conclusion

A optimization strategy used for this particular customer query,
the Grouping Set strategy, was not making a proper copy of an  
internal optimization object before using it to cost various    
grouping set plans.  For the most part the lack of a separate,  
modifiable copy of this object would have self corrected in a  
subsequent strategy and it would not have been discovered as a  
problem but because this query was run as ALWCPYDTA *YES, the  
optimizer used this internal object (not a modifiable copy)    
before it had a chance to 'self correct'.   This problem has    
been corrected.                                                

Temporary Fix

Comments

Circumvention

PTFs Available

R720 MF68917  1000

R730 MF68203  1098

R740 MF68211  1091

Affected Modules

Affected Publications

Summary Information

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