|
Problem IC62742
|
Status: Closed |
THE ROUND SCALAR FUNCTION CAN RETURN THE WRONG RESULT ON A DECFL OATINPUT VALUES OF Infinity/-Infinity |
| product: |
DB2 FOR LUW / DB2FORLUW / 950 - DB2 |
| Problem description: |
The scenario can be re-created as follows:
Table creation: create table dectest (col1 decfloat(34));
Insert special values like Infinity/-Infinity: insert into
dectest values(Infinity),(-Infinity)
The ROUND function may return Nan instead of Infinity/-Infinity.
The output appears as follows:
select col1,ROUND(col1,5) from dectest
COL1 2
------------------------------------------
------------------------------------------
Infinity
NaN (wrong result we expect Infinity)
SQL0364W DECFLOAT exception "INVALID OPERATION" has occurred
during "BUILT-IN
FUNCTION" operation. SQLSTATE=0168D
-Infinity
NaN (wrong result , expect: -Infinity)
SQL0364W DECFLOAT exception "INVALID OPERATION" has occurred
during "BUILT-IN
FUNCTION" operation. SQLSTATE=0168D |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* ROUND SCALAR FUNCTION on DECFLOAT with INFINITY VALUE *
****************************************************************
* PROBLEM DESCRIPTION: *
* THE ROUND SCALAR FUNCTION CAN RETURN THE WRONG RESULT ON A *
* DECFLOAT INPUT VALUES OF Infinity/-Infinity *
****************************************************************
* RECOMMENDATION: *
* install this fix *
**************************************************************** |
| Local Fix: |
Rewrite the SQL query to have a case statement which avoids
using the ROUND function on these
special values. |
| available fix packs: |
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 9.5 Fix Pack 8 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 9 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 10 for Linux, UNIX, and Windows
|
| Solution |
THE ROUND SCALAR FUNCTION CAN RETURN THE WRONG RESULT ON A
DECFLOAT INPUT VALUES OF Infinity/-Infinity.
First Fixed in DB2 Version 9.5 Fix Pack 6a. |
| Workaround |
not known / see Local fix |
| BUG-Tracking |
forerunner : APAR is sysrouted TO one or more of the following: IC64092
follow-up : |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 24.08.2009
14.05.2010
07.02.2011 |
| Problem solved at the following versions (IBM BugInfos) |
9.5.FP6
|
| Problem solved according to the fixlist(s) of the following version(s) |
