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DB2 - Problem description

Problem IC84304 Status: Closed

DECODE FUNCTION MAY NOT MATCH NULL VALUES

product:
DB2 FOR LUW / DB2FORLUW / A10 - DB2
Problem description:
When the first parameter of the DECODE function is a string 
type, it may not match a NULL value at an even number position 
of the 
DECODE function.  This also applies to '' (empty string) when 
database is in ORA mode. 
 
Example: 
  select decode (a1, null, 'null', '00') as a1 
  from (select cast (NULL as CHAR) as a1 
             from table (values(1))); 
 
   returns '00' instead of 'null'.
Problem Summary:
**************************************************************** 
* USERS AFFECTED:                                              * 
* All                                                          * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* See Error Description                                        * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Upgrade to DB2 Version 10.1 Fix Pack 1.                      * 
****************************************************************
Local Fix:
available fix packs:
DB2 Version 10.1 Fix Pack 1 for Linux, UNIX, and Windows
DB2 Version 10.1 Fix Pack 2 for Linux, UNIX, and Windows
DB2 Version 10.1 Fix Pack 3 for Linux, UNIX, and Windows
DB2 Version 10.1 Fix Pack 4 for Linux, UNIX, and Windows
DB2 Version 10.1 Fix Pack 3a for Linux, UNIX, and Windows
DB2 Version 10.1 Fix Pack 6 for Linux, UNIX, and Windows

Solution
The issue is fixed in DB2 Version 10.1 Fix Pack 1.
Workaround
not known / see Local fix
Timestamps
Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :
13.06.2012
08.11.2012
08.11.2012
Problem solved at the following versions (IBM BugInfos)
Problem solved according to the fixlist(s) of the following version(s)
10.1.0.1 FixList
10.5.0.1 FixList