|
Problem IC66315
|
Status: Closed |
CARDINALITY OF OR PREDICATE IS UNDERESTIMATED WHEN LIKE PREDICATE IS A SUBTERM OF AN OR PREDICATE. |
| product: |
DB2 FOR LUW / DB2FORLUW / 980 - DB2 |
| Problem description: |
Cardinality of OR predicate is underestimated when LIKE
predicate is a subterm of an OR predicate, for example:
((Q1.PRODUCT_ID LIKE 'A%') OR (Q1.PRODUCT_ID = '1234567')) |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* ALL *
****************************************************************
* PROBLEM DESCRIPTION: *
* CARDINALITY OF OR PREDICATE IS UNDERESTIMATED WHEN *
* LIKEPREDICATE IS A SUBTERM OF AN OR PREDICATE. *
****************************************************************
* RECOMMENDATION: *
* Upgrade to Version 9.8 Fix Pack 3 *
**************************************************************** |
| Local Fix: |
|
| available fix packs: |
DB2 Version 9.8 Fix Pack 3 for Linux, UNIX, and Windows
DB2 Version 9.8 Fix Pack 4 for AIX and Linux
DB2 Version 9.8 Fix Pack 5 for AIX and Linux
|
| Solution |
Problem was first fixed in Version 9.8 Fix Pack 3 |
| Workaround |
not known / see Local fix |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 17.02.2010
10.01.2011
10.01.2011 |
| Problem solved at the following versions (IBM BugInfos) |
9.8.FP3
|
| Problem solved according to the fixlist(s) of the following version(s) |
| 9.8.0.3
|
 |
