|
Problem IT38495
|
Status: Closed |
DB2 MIGHT TERMINATE ABNORMALLY FOR QUERIES WITH MULTIPLE OUTER JOINS
|
| product: |
DB2 FOR LUW / DB2FORLUW / B10 - DB2 |
| Problem description: |
If you have a a query that meets the following characteristics:
1. Query with multiple Outer join and equi-join predicates
2. Null producing side is a complex view
3. Where clause with equality predicates referencing the join
columns and constants
4. Cost based
it may trap in sqlnr_OJ_semi_join() with the following stack:
sqlnr_OJ_semi_join
sqlnr_qrwprep_phase2
sqlnr_prep2_action
sqlnr_comp
sqlnr_seq
sqlnr_rcci
sqlnr_exe
This problem starts to happen on v11.1.4.6, doesn't happen on
previous versions. |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* all *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Upgrade to 11.1.4.7 *
**************************************************************** |
| Local Fix: |
Set the following registry
- with the optimization guideline to the affected queries:
/*
*/
or
- at the instance level:
db2set DB2COMPOPT=NOOJSJ -im |
| Solution |
|
| Workaround |
****************************************************************
* USERS AFFECTED: *
* all *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Upgrade to 11.1.4.7 *
**************************************************************** |
| Comment |
Upgrade to 11.1.4.7 |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 25.09.2021
17.04.2022
17.04.2022 |
| Problem solved at the following versions (IBM BugInfos) |
|
| Problem solved according to the fixlist(s) of the following version(s) |
