|
Problem IT01000
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Status: Closed |
CHAR(' ',0) RETURNS EMPTY STRING INSTEAD OF NULL IN VARCHAR2 ENABLED DATABASE. |
| product: |
DB2 FOR LUW / DB2FORLUW / A50 - DB2 |
| Problem description: |
In a VARCHAR2 enabled database, an assignment of an empty string
value to a CHAR, VARCHAR, GRAPHIC or VARGRAPHIC should produce a
NULL value. However, if a string literal is not empty, consists
of all blanks is passed as an argument to the scalar functions
CHAR, VARCHAR, GRAPHIC or VARGRAPHIC, and has a specified length
of 0, then an empty string is returned instead of the expected
NULL. The returned string might look like the following sample:
values char(' ',0)
1
-
1 record(s) selected. |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* ALL *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Upgrade to DB2 version 10.5 fix pack 4 *
**************************************************************** |
| Local Fix: |
Change the string literal to an empty string. For example,
changing the string literal to CHAR('',0) will fix this issue. |
| available fix packs: |
DB2 Cancun Release 10.5.0.4 (also known as Fix Pack 4) for Linux, UNIX, and Windows
DB2 Version 10.5 Fix Pack 9 for Linux, UNIX, and Windows
|
| Solution |
First fixed in DB2 version 10.5 fix pack 4 |
| Workaround |
not known / see Local fix |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 11.04.2014
08.09.2014
07.04.2015 |
| Problem solved at the following versions (IBM BugInfos) |
|
| Problem solved according to the fixlist(s) of the following version(s) |
| 10.5.0.4
|
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