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DB2 - Problem description

Problem IC73360 Status: Closed

DB2 MAY ABEND WHEN A CLOB TYPE COLUMN IS CAST TO CLOB FOR MIXED DATA TYPE

product:
DB2 FOR LUW / DB2FORLUW / 950 - DB2
Problem description:
In unicode database, if query has casting function to convert a 
CLOB type to CLOB FOR MIXED DATA, db2 may crash and stacktrace 
contains the following function calls repeatedly: 
 
sqlnq_encap_doit 
sqlnq_encap_doit 
sqlnq_convertNode 
sqlnq_encap_cast_rtn 
 
Here is an example: 
create table t1 (c1 clob); 
select cast(c1 as clob for mixed data) from t1;
Problem Summary:
**************************************************************** 
* USERS AFFECTED:                                              * 
* All                                                          * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* In unicode database, if query has casting function to        * 
* convert a                                                    * 
* CLOB type to CLOB FOR MIXED DATA, db2 may crash and          * 
* stacktrace                                                   * 
* contains the following function calls repeatedly:            * 
*                                                              * 
*                                                              * 
*                                                              * 
* sqlnq_encap_doit                                             * 
*                                                              * 
* sqlnq_encap_doit                                             * 
*                                                              * 
* sqlnq_convertNode                                            * 
*                                                              * 
* sqlnq_encap_cast_rtn                                         * 
*                                                              * 
*                                                              * 
*                                                              * 
* Here is an example:                                          * 
*                                                              * 
* create table t1 (c1 clob);                                   * 
*                                                              * 
* select cast(c1 as clob for mixed data) from t1;              * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Upgrade to 9.5FP8 and  higher versions.                      * 
****************************************************************
Local Fix:
N/A
available fix packs:
DB2 Version 9.5 Fix Pack 8 for Linux, UNIX, and Windows
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
The problem will be addressed in V9.5FP8 and higher versions
Workaround
not known / see Local fix
BUG-Tracking
forerunner  : APAR is sysrouted TO one or more of the following: IC74175 
follow-up : 
Timestamps
Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :
17.12.2010
05.07.2011
05.07.2011
Problem solved at the following versions (IBM BugInfos)
9.5.FP8
Problem solved according to the fixlist(s) of the following version(s)
9.5.0.8 FixList