|
Problem IT05898
|
Status: Closed |
WRONG RESULTS RECEIVED FOR A QUERY DUE TO INCORRECT INTERNAL COLUMN STRUCTURES |
| product: |
DB2 FOR LUW / DB2FORLUW / A50 - DB2 |
| Problem description: |
The wrong result set may be outputted if the Optimizer chooses
an Explain Plan with the following characteristics:
- HSJN has an NLJN in the Outer
- The NLJN has another HSJN in it's Inner
- The second, HSJN also has an NLJN in it's Outer:
HSJN( A)
|
---------------------------------------------------
|
NLJN(B)
/ \
< other Lolepops like TEMP, etc>
|
HSJN(C)
|
------------------
|
NLJN(D)
In a rare case, internal Optimization could create wrong
internal structures and the Column coming from HSJN(C) Payload
could return the same value as the last value that was processed
in HSJN(C). |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* All users *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Upgrade to DB2 version 10.5.0.5. *
**************************************************************** |
| Local Fix: |
To avoid the problem, execute the following command and then
recycle the instance:
db2set DB2_TCG_DEFAULT_OPTIONS="set disable_pushdown on" |
| Solution |
The problem is first fixed in DB2 version 10.5.0.5. |
| Workaround |
not known / see Local fix |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 03.12.2014
09.04.2015
09.04.2015 |
| Problem solved at the following versions (IBM BugInfos) |
|
| Problem solved according to the fixlist(s) of the following version(s) |
| 10.5.0.5
|
 |
