|
Problem IC69020
|
Status: Closed |
DECODE FUNCTION USES UNEXPECTED BLANK-PADDED COMPARISON FOR FIX-LENGTH STRING EXPRESSIONS IN VARCHAR2 COMPATIBILITY MODE |
| product: |
DB2 FOR LUW / DB2FORLUW / 970 - DB2 |
| Problem description: |
When using the DECODE function in VARCHAR2 compatibility mode,
the fix-length string expressions are compared using
blank-padded comparison, which is unexpected.
Here is an example:
db2set DB2_COMPATIBILITY_VECTOR=20
db2stop
db2start
db2 create db sample
db2 connect to sample
db2 create table t1 (c1 char(13))
db2 insert into t1 values('ABCDEFG')
db2 "SELECT '---'||DECODE('1','1 ','ABC', 'DEF') ||
'---' FROM t1"
output: ---ABC---
Expected output is: ---DEF--- |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* ALL *
****************************************************************
* PROBLEM DESCRIPTION: *
* When using the DECODE function in VARCHAR2 compatibility *
* mode, the fix-length string expressions are compared using *
* blank-padded comparison, which is unexpected. *
* *
* Here is an example: *
* *
* db2set DB2_COMPATIBILITY_VECTOR=20 *
* db2stop *
* db2start *
* db2 create db sample *
* db2 connect to sample *
* db2 create table t1 (c1 char(13)) *
* db2 insert into t1 values('ABCDEFG') *
* *
* db2 "SELECT '---'||DECODE('1','1 ','ABC', 'DEF') || *
* '---' FROM t1" *
* output: ---ABC--- *
* Expected output is: ---DEF--- *
****************************************************************
* RECOMMENDATION: *
* Upgrade to DB2 V9.7 Fix Pack 4 or later. *
**************************************************************** |
| Local Fix: |
Cast the first parameter of DECODE function to VARCHAR. |
| available fix packs: |
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 8 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 9 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 9a for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 10 for Linux, UNIX, and Windows
|
| Solution |
Issue first fixed in DB2 V9.7 Fix Pack 4 |
| Workaround |
not known / see Local fix |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 04.06.2010
09.05.2011
09.05.2011 |
| Problem solved at the following versions (IBM BugInfos) |
9.7.FP4
|
| Problem solved according to the fixlist(s) of the following version(s) |
| 9.7.0.4
|
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