DB2 FOR LUW / DB2FORLUW / 970 - DB2

DB2 SQL Query Compiler has improved the performance of secondary 
table access for incremental maintenance of a materialized query 
table (MQT) when all of the following conditions are satisfied: 
 
(1) it is a partitioned (DPF) environment 
 
(2) the MQT is a refresh immediate MQT or a staging table.  The 
MQT definition involves a join between more than one base table 
(for example, T1 and T2) 
 
(3) the SQL statement S1 being compiled is an 
INSERT/UPDATE/DELETE statement that fires a trigger (Trig1). 
The body of the trigger modifies one of the base tables  (say, 
T1) of the MQT. 
 
(4) In the incremental MQT maintenance section of the access 
plan, if the join predicate between T2 and the modified rows of 
T1 could be reduced to a local predicate (i.e. a predicate that 
references only T2).  The reduction of the join predicate to a 
local predicate may occur when the statement being compiled (S1) 
or the trigger (Trig1) has specified a constant or parameter 
marker for the join column of T1. 
 
When all of the conditions above are satisfied,  the evaluation 
of the local predicate on T2 during incremental maintenance of 
MQT will be pushed down for a more efficient access.

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* USERS AFFECTED:                                              * 
* DPF customers                                                * 
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* PROBLEM DESCRIPTION:                                         * 
* See Error Description                                        * 
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* RECOMMENDATION:                                              * 
* Upgrade to DB2 version 9.7 Fix Pack 6                        * 
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DB2 Version 9.7 Fix Pack 6 for Linux, UNIX, and Windows
 DB2 Version 9.7 Fix Pack 7 for Linux, UNIX, and Windows
 DB2 Version 9.7 Fix Pack 8 for Linux, UNIX, and Windows
 DB2 Version 9.7 Fix Pack 9 for Linux, UNIX, and Windows
 DB2 Version 9.7 Fix Pack 9a for Linux, UNIX, and Windows
 DB2 Version 9.7 Fix Pack 10 for Linux, UNIX, and Windows
 

This APAR is fixed in DB2 version 9.7 Fix Pack 6.

not known / see Local fix

forerunner  : APAR is sysrouted TO one or more of the following: IC84217 
follow-up : 

Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :

21.10.2011
12.06.2012
12.06.2012

9.7.FP6