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DB2 - Problem description

Problem IC91812 Status: Closed

QUERY CONTAINING EXISTS SUBQUERY AND FETCH FIRST N ROWS CLAUSE MIGHT
PRODUCE INCORRECT RESULTS

product:
DB2 FOR LUW / DB2FORLUW / A10 - 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 10.1 fixpack 3                        * 
****************************************************************
Local Fix:
1. Remove fetch first n rows clause 
2. Add order by clause to the subquery.
available fix packs:
DB2 Version 10.1 Fix Pack 3 for Linux, UNIX, and Windows
DB2 Version 10.1 Fix Pack 4 for Linux, UNIX, and Windows
DB2 Version 10.1 Fix Pack 3a for Linux, UNIX, and Windows
DB2 Version 10.1 Fix Pack 6 for Linux, UNIX, and Windows

Solution
Fixed in DB2 version 10.1 fixpack 3
Workaround
not known / see Local fix
BUG-Tracking
forerunner  : APAR is sysrouted TO one or more of the following: IC95267 
follow-up : 
Timestamps
Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :
22.04.2013
11.11.2013
11.11.2013
Problem solved at the following versions (IBM BugInfos)
Problem solved according to the fixlist(s) of the following version(s)
10.1.0.3 FixList
10.1.0.3 FixList