|
Problem IC68061
|
Status: Closed |
INCORRECT CARIDNALITY ESTIMATE WHEN MORE THAN ONE EQUALITY LOCAL PREDICATES ON A TABLE THAT ARE FULLY QUALIFIED IN UNIQUE INDEX |
| product: |
DB2 FOR LUW / DB2FORLUW / 980 - DB2 |
| Problem description: |
When there is a table that has a primary key index, and
the query references all the columns in the primary or unique
index, as local equality predicates, the optimizer does
not consider column group statistics or keycard information from
the index, and rather treats the predicates independent
of each other. |
| Problem Summary: |
When there is a table that has a primary key index, and
the query references all the columns in the primary or unique
index, as local equality predicates, the optimizer does
not consider column group statistics or keycard information
from
the index, and rather treats the predicates independent
of each other. |
| Local Fix: |
collecting distribution statistics may help alleviate
the problem. |
| available fix packs: |
DB2 Version 9.8 Fix Pack 4 for AIX and Linux
DB2 Version 9.8 Fix Pack 5 for AIX and Linux
|
| Solution |
module engn_sqno
fixed >= v98 fpk4 |
| Workaround |
collecting distribution statistics may help alleviate
the problem. |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 20.04.2010
08.08.2011
08.08.2011 |
| Problem solved at the following versions (IBM BugInfos) |
9.8.FPk4
|
| Problem solved according to the fixlist(s) of the following version(s) |
| 9.8.0.4
|
 |
