|
Problem IC82594
|
Status: Closed |
DB2 MIGHT ABEND WHEN EXECUTING A QUERY WITH NESTED OR PREDICATE |
| product: |
DB2 FOR LUW / DB2FORLUW / 950 - DB2 |
| Problem description: |
Under rare scenarios, DB2 might abend under the following
scenarios.
1. The query has a nested OR predicate
2. The deepest OR subterm has atleast one always false
predicate.
Always false predicates are ones which can be found to be
never true. eg. 1 = 0, col1 <> col1 (assuming col1 is not null),
etc.
3. The deep OR subterm has atleast one AND subterm.
The following stack trace is observed:
sqlnr_theorem_prover_detail
sqlnr_prove_OR_tree
sqlnr_theorem_prover
sqlnr_qrwprep_phase2
sqlnr_prep2_action
sqlnr_comp
sqlnr_seq
sqlnr_rcc
sqlnr_exe
... |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* All *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Please upgrade to DB2 version 950 fixpack 10 *
**************************************************************** |
| Local Fix: |
Rewrite the predicate to make the deep OR subterm be the last
subterm in the topmost OR. |
| Solution |
Problem is first fixed in DB2 version 950 fixpack 10 |
| Workaround |
not known / see Local fix |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 10.04.2012
30.10.2012
30.10.2012 |
| Problem solved at the following versions (IBM BugInfos) |
9.5.0
|
| Problem solved according to the fixlist(s) of the following version(s) |
| 9.5.0.10
|
 |
