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DB2 - Problem description

Problem IC79607 Status: Closed

QUERY COMPILER RETURNS -901 WITH ERROR MESSAGE "HAD TROUBLES WHILE
REMOVING AN UNREFERENCED QCL."

product:
DB2 FOR LUW / DB2FORLUW / 950 - DB2
Problem description:
If a query contains content like 'T1 LEFT OUTER JOIN T2 WHERE 
T2.COL IS NULL', the query compiler may return -901 error like 
below: 
 
SQL0901N  The SQL statement failed because of a non-severe 
system error. 
Subsequent SQL statements can be processed.  (Reason "Had 
troubles while 
removing an unreferenced QCL.".)  SQLSTATE=58004 
 
When the error is hit, the compiler error stack will be logged 
in db2diag.log like the following: 
 
Compiler error stack for rc = -2144272298: 
 
sqlnn_cmpl[370] 
 
sqlnr_exe[1200] 
 
sqlnr_rcc[100] 
 
sqlnr_seq[100] 
 
sqlnr_comp[110] 
 
sqlnr_optprep_action[100] 
 
sqlnr_optprep[125] 
 
sqlnr_Manual2NativeAJ[85]
Problem Summary:
**************************************************************** 
* USERS AFFECTED:                                              * 
* DB2 V9.5 users                                               * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* See Error Description                                        * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Upgrade to DB2 V9.5FP9                                       * 
****************************************************************
Local Fix:
db2set DB2_ANTIJOIN=NO
available fix packs:
DB2 Version 9.5 Fix Pack 9 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 10 for Linux, UNIX, and Windows

Solution
Fix in DB2 V9.5FP9
Workaround
not known / see Local fix
Timestamps
Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :
03.11.2011
28.03.2012
28.03.2012
Problem solved at the following versions (IBM BugInfos)
9.5.FP9
Problem solved according to the fixlist(s) of the following version(s)
9.5.0.9 FixList