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DB2 - Problem description

Problem IC63538 Status: Closed

WRONG RESULTS OR ERROR SQL0802 WITH FUNCTION SYSIBM.POWER WHERE SECOND
ARGUMENT IS NULL

product:
DB2 FOR LUW / DB2FORLUW / 970 - DB2
Problem description:
The result of function SYSIBM.POWER is supposed to be NULL is 
any of it's input arguments is NULL. 
 
SYSIBM.POWER will either return wrong results or error SQL0802 
if the second argument is NULL. 
e.g.: 
 
db2 "values(power(10,cast(NULL as integer)))" 
 
1 
----------- 
          1 
 
 
 
 db2 "values(power(10,cast(NULL as decimal(5,1))))" 
 
1 
------------------------ 
  +1.00000000000000E+140 
 
 
 
db2 "values(power(10,cast(NULL as decimal)))" 
 
1 
------------------------ 
SQL0802N  Arithmetic overflow or other arithmetic exception 
occurred. 
SQLSTATE=22003 
 
 
This APAR addresses this issue and ensures correct results when 
using function SYSIBM.POWER.
Problem Summary:
**************************************************************** 
* USERS AFFECTED:                                              * 
* All                                                          * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* The result of function SYSIBM.POWER is supposed to be NULL   * 
* is                                                           * 
* any of it's input arguments is NULL.                         * 
*                                                              * 
*                                                              * 
*                                                              * 
* SYSIBM.POWER will either return wrong results or error       * 
* SQL0802                                                      * 
* if the second argument is NULL.                              * 
*                                                              * 
* e.g.:                                                        * 
*                                                              * 
*                                                              * 
*                                                              * 
* db2 "values(power(10,cast(NULL as integer)))"                * 
*                                                              * 
*                                                              * 
*                                                              * 
* 1                                                            * 
*                                                              * 
* -----------                                                  * 
*                                                              * 
* 1                                                            * 
*                                                              * 
*                                                              * 
*                                                              * 
*                                                              * 
*                                                              * 
*                                                              * 
*                                                              * 
* db2 "values(power(10,cast(NULL as decimal(5,1))))"           * 
*                                                              * 
*                                                              * 
*                                                              * 
* 1                                                            * 
*                                                              * 
* ------------------------                                     * 
*                                                              * 
* +1.00000000000000E+140                                       * 
*                                                              * 
*                                                              * 
*                                                              * 
*                                                              * 
*                                                              * 
*                                                              * 
*                                                              * 
* db2 "values(power(10,cast(NULL as decimal)))"                * 
*                                                              * 
*                                                              * 
*                                                              * 
* 1                                                            * 
*                                                              * 
* ------------------------                                     * 
*                                                              * 
* SQL0802N  Arithmetic overflow or other arithmetic exception  * 
*                                                              * 
* occurred.                                                    * 
*                                                              * 
* SQLSTATE=22003                                               * 
*                                                              * 
*                                                              * 
*                                                              * 
*                                                              * 
*                                                              * 
* This APAR addresses this issue and ensures correct results   * 
* when                                                         * 
* using function SYSIBM.POWER.                                 * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Upgrade to DB2 version 9.7 FP2                               * 
****************************************************************
Local Fix:
Use SYSFUN.POWER as a workaround.
available fix packs:
DB2 Version 9.7 Fix Pack 2 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 3 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 3a for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 4 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 5 for Linux, UNIX, and Windows
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 9a 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 10 for Linux, UNIX, and Windows

Solution
first fixed in 9.7 FP2 (Signature: 9.7.0.2; Build level: 
s100514)
Workaround
Use SYSFUN.POWER as a workaround.
Timestamps
Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :
02.10.2009
31.05.2010
31.05.2010
Problem solved at the following versions (IBM BugInfos)
9.7.0.2,
9.7.FP2
Problem solved according to the fixlist(s) of the following version(s)
9.7.0.2 FixList