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DB2 - Problem description

Problem IC68058 Status: Closed

REPLACE('aaa','a','') DOES NOT RETURN NULL IN
VARCHAR2 COMPATIBILITY MODE

product:
DB2 FOR LUW / DB2FORLUW / 980 - DB2
Problem description:
In VARCHAR2 compatibility mode, the SYSIBM.REPLACE built-in 
function returns an empty string instead of the expected NULL 
value.  For example: 
 
db2 "VALUES REPLACE('aaa','a','')" 
 
1 
--- 
 
 
  1 record(s) selected.
Problem Summary:
**************************************************************** 
* USERS AFFECTED:                                              * 
* Varchar2 compatibility mode                                  * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* In VARCHAR2 compatibility mode, the SYSIBM.REPLACE built-in  * 
*                                                              * 
* function returns an empty string instead of the expected     * 
* NULL                                                         * 
* value.  For example:                                         * 
*                                                              * 
*                                                              * 
*                                                              * 
* db2 "VALUES REPLACE('aaa','a','')"                           * 
*                                                              * 
*                                                              * 
*                                                              * 
* 1                                                            * 
*                                                              * 
* ---                                                          * 
*                                                              * 
*                                                              * 
*                                                              * 
*                                                              * 
*                                                              * 
*   1 record(s) selected.                                      * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Upgrade to Version 9.8 FixPack 3.                            * 
****************************************************************
Local Fix:
Use the TRANSLATE function instead of REPLACE: REPLACE(A,B,'') 
-> TRANSLATE(A,'',B).
available fix packs:
DB2 Version 9.8 Fix Pack 3 for Linux, UNIX, and Windows
DB2 Version 9.8 Fix Pack 4 for AIX and Linux
DB2 Version 9.8 Fix Pack 5 for AIX and Linux

Solution
Problem was first fixed in DB2 UDB Version 9.8 FixPack 2.
Workaround
not known / see Local fix
Timestamps
Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :
20.04.2010
10.01.2011
10.01.2011
Problem solved at the following versions (IBM BugInfos)
9.8.FP2,
9.8.FP3
Problem solved according to the fixlist(s) of the following version(s)
9.8.0.3 FixList