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DB2 - Problem description

Problem IC79268 Status: Closed

POSSIBLE TRAP DURING QUERY COMPILATION IN A DATABASE THAT USES UCA-BASED
COLLATION

product:
DB2 FOR LUW / DB2FORLUW / 970 - DB2
Problem description:
This problem can occur in a database using UCA-based collation 
during query compilation of an SQL statement that contains one 
or more equality join predicates that reference columns of type 
CHAR, VARCHAR, GRAPHIC, VARGRAPHIC and one or both of the 
columns in the join predicate have distribution statistics 
collected.  The problem does not occur if the character type is 
FOR BIT DATA. 
 
You can identify that you hit this problem if the following 
function list is found in the trap file stack trace: 
 
sqlnlsICUstrcollUTF16BE 
sqlv_g_varUCA_comp 
sqlrxcp2 
sqlno_compare_literal 
sqlno_nud_compare_literal 
sqlno_ff_updateEffHighLowKeys 
sqlno_ff_col_eq_col 
sqlno_ff_compute_atomprd 
 
This problem was first introduced in the following DB2 releases: 
 
Version 9.5 Fix Pack 8 
Version 9.7 Fix Pack 4
Problem Summary:
**************************************************************** 
* USERS AFFECTED:                                              * 
* Users with databases that use UCA-based collation            * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* See Error Description                                        * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Update to Version 9.7 Fix Pack 6                             * 
****************************************************************
Local Fix:
You can avoid the problem by not collecting distribution 
statistics on the join predicate columns.
available fix packs:
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

Solution
Problem was first fixed in Version 9.7 Fix Pack 6
Workaround
not known / see Local fix
BUG-Tracking
forerunner  : APAR is sysrouted TO one or more of the following: IC79309 
follow-up : 
Timestamps
Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :
18.10.2011
02.08.2012
02.08.2012
Problem solved at the following versions (IBM BugInfos)
9.7.FP6
Problem solved according to the fixlist(s) of the following version(s)
9.7.0.6 FixList
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