|
Problem IC95426
|
Status: Closed |
QUERY CONTAINING EXISTS SUBQUERY AND FETCH FIRST N ROWS CLAUSE MIGHT PRODUCE INCORRECT RESULTS |
| product: |
DB2 FOR LUW / DB2FORLUW / A50 - DB2 |
| Problem description: |
Under certain scenario, DB2 might produce incorrect results if
the following conditions are true:
1. The query contains an exists subquery
2. The subquery has a fetch first n rows clause in the outer
most subselect
3. There is either a LOB column or a total column column width >
32K in the query output list.
Eg.:
select P.lob
from P
where exists (select 1 from SQ where SQ.c1 = P.c1 fetch first 1
rows only); |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* All *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Upgrade to DB2 version 10.5 and Fix Pack 4 or higher. *
**************************************************************** |
| Local Fix: |
1. Remove fetch first n rows clause
2. Add order by clause to the subquery. |
| 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 |
Problem was first fixed in DB2 version 10.5 and Fix Pack 4. |
| Workaround |
not known / see Local fix |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 27.08.2013
08.09.2014
08.09.2014 |
| 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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