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Problem IC95053
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Status: Closed |
THE QUERY STATEMENT WITH A SUBQUERY PREDICATE MIGHT NOT RETURN ROWS AFTER ENABLING DB2_COMPATIBILITY_VECTOR=ORA |
| product: |
DB2 FOR LUW / DB2FORLUW / A10 - DB2 |
| Problem description: |
The following are the necessary conditions that might cause the
problem of "0 record(s) selected" to occur:
- The DB2_COMPATIBILITY_VECTOR registry variable is set to ORA
- A "X IN (select Y from <subquery>)" query predicate.
- X is the CHAR type, and Y is the VARCHAR type.
To verify that this problem has occurred in your query, generate
the db2exfmt command and
search if the optimized statement contains the following:
- "(Q<num>.X >= $C3 )"
- "(Q<num>.X <= $C2)"
Also, check to see if the plan details contain:
- "(ORA_VARCHAR(Q<num>.X) <= $C1 )"
- "(ORA_VARCHAR((Q<num>.X)>= $C0)". |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* All users *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Upgrade to DB2 version 10.1.0.3. *
**************************************************************** |
| Local Fix: |
Rewrite the IN predicate to the EXISTS predicate:
select *
from table1
where pk_alansawyer in
(select pk_christine
from table2);
to
select *
from table1
where exists
(select 1
from table2 where pk_alansawyer = pk_christine); |
| 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 |
The problem is first fixed in DB2 version 10.1.0.3. |
| Workaround |
not known / see Local fix |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 20.08.2013
27.09.2013
27.09.2013 |
| Problem solved at the following versions (IBM BugInfos) |
|
| Problem solved according to the fixlist(s) of the following version(s) |
| 10.1.0.3
|
 |
| 10.1.0.3
|
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