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DB2 - Problem description

Problem IC63612 Status: Closed

EXECUTION OF STORED PROCEDURE ON Z/OS WITH NULL INPUT PARAMETER INSERTS
STRING "NULL" INSTEAD OF NULL VALUE

product:
DB2 FOR LUW / DB2FORLUW / 950 - DB2
Problem description:
When executing a Stored Procedure on z/OS DB2 when input 
parameter is null, this will result with string NULL inserted as 
opposed to a null character. 
 
For example. 
db2 => create procedure sptest2(IN id char(20)) language sql 
begin insert into test values (id, 10); end 
 
db2 call sptest2(null) 
 
db2 select * from test 
 
A                            B 
--------                   ----------- 
null                               10        ===> A string 
"null" value is inserted 
 
If you instead insert into the table 
 
insert into test values (null, 8)   ===> this actually inserts a 
SQL null value in the table 
 
db2 select * from test 
 
A                            B 
--------                   ----------- 
-                                   8    ==> The "-" is showing 
as null under column "A" 
 
So the null character is shown and not the string null.
Problem Summary:
**************************************************************** 
* USERS AFFECTED:                                              * 
* Users connecting to Z/OS DB2 to run Stored Procedures        * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* When executing a Stored Procedure on z/OS DB2 when input     * 
*                                                              * 
* parameter is null, this will result with string NULL         * 
* inserted as                                                  * 
* opposed to a null character.                                 * 
*                                                              * 
*                                                              * 
*                                                              * 
* For example.                                                 * 
*                                                              * 
* db2 => create procedure sptest2(IN id char(20)) language sql * 
*                                                              * 
* begin insert into test values (id, 10); end                  * 
*                                                              * 
*                                                              * 
*                                                              * 
* db2 call sptest2(null)                                       * 
*                                                              * 
*                                                              * 
*                                                              * 
* db2 select * from test                                       * 
*                                                              * 
*                                                              * 
*                                                              * 
* A                            B                               * 
*                                                              * 
* --------                   -----------                       * 
*                                                              * 
* null                               10        ===> A string   * 
*                                                              * 
* "null" value is inserted                                     * 
*                                                              * 
*                                                              * 
*                                                              * 
* If you instead insert into the table                         * 
*                                                              * 
*                                                              * 
*                                                              * 
* insert into test values (null, 8)   ===> this actually       * 
* inserts a                                                    * 
* SQL null value in the table                                  * 
*                                                              * 
*                                                              * 
*                                                              * 
* db2 select * from test                                       * 
*                                                              * 
*                                                              * 
*                                                              * 
* A                            B                               * 
*                                                              * 
* --------                   -----------                       * 
*                                                              * 
* -                                   8    ==> The "-" is      * 
* showing                                                      * 
* as null under column "A"                                     * 
*                                                              * 
*                                                              * 
*                                                              * 
* So the null character is shown and not the string null.      * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Upgrade to Version 9.5 Fixpak 5                              * 
****************************************************************
Local Fix:
available fix packs:
DB2 Version 9.5 Fix Pack 5 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 6a for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 7 for Linux, UNIX, and Windows
DB2 Version 9.1 Fix Pack 10  for Linux, UNIX and Windows
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 9.1 Fix Pack 11  for Linux, UNIX and Windows
DB2 Version 9.1 Fix Pack 12  for Linux, UNIX and Windows
DB2 Version 9.5 Fix Pack 10 for Linux, UNIX, and Windows

Solution
Problem first fixed in Version 9.5 Fixpak 5.
Workaround
not known / see Local fix
Timestamps
Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :
07.10.2009
06.01.2010
06.01.2010
Problem solved at the following versions (IBM BugInfos)
9.5.
Problem solved according to the fixlist(s) of the following version(s)
9.1.0.9 FixList
9.5.0.5 FixList
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