|
Problem IC83674
|
Status: Closed |
SQL WITH NESTED MATH OPERATIONS ON COLUMNS THAT ARE DEFINED WITH NOT NULL AND USING FUNCTIONS MAY RETURNED DIFFERENT RESULTS. |
| product: |
DB2 FOR LUW / DB2FORLUW / 950 - DB2 |
| Problem description: |
Incorrect results are possible when doing nested math operations
on columns that are defined with NOT NULL and using functions.
Example (pseudo-code):
create function3(col1 bigint,col2 bigint)
{
return function1(col1)-function2(col2);
}
SELECT SUM(function3(column1,column2)) from table;
<-- intermittent incorrect results are possible on databases
with smaller non-automatic SORTHEAP. |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* ALL *
****************************************************************
* PROBLEM DESCRIPTION: *
* Wrong results are possible when doing nested math operations *
* on *
* non-nullable columns and using functions. *
* Example (pseudo-code): *
* *
* create function3(col1 bigint,col2 bigint) *
* { *
* return function1(col1)-function2(col2); *
* } *
* *
* SELECT SUM(function3(column1,column2)) from table; *
* <-- intermittent wrong results are possible.ly to happen on *
* databases with smaller non-automatic SORTHEAP. *
****************************************************************
* RECOMMENDATION: *
* Upgrade to DB2 UDB version 9.5 fixpack 10. *
**************************************************************** |
| Local Fix: |
select SUM(col1) - SUM(col2) from table |
| Solution |
Problem was first fixed in DB2 UDB Version 9.5 Fix Pack 10. |
| Workaround |
not known / see Local fix |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 22.05.2012
21.08.2012
07.12.2012 |
| Problem solved at the following versions (IBM BugInfos) |
9.5.FP10
|
| Problem solved according to the fixlist(s) of the following version(s) |
| 9.5.0.10
|
 |
