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Problem IC62571
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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 / 970 - 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 9.7 Fix Pack 3 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 3a for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 4 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 5 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 6 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 7 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 8 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 9a for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 9 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 10 for Linux, UNIX, and Windows
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| Solution |
collecting distribution statistics may help alleviate
the problem. |
| Workaround |
collecting distribution statistics may help alleviate
the problem. |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 14.08.2009
23.09.2010
23.09.2010 |
| Problem solved at the following versions (IBM BugInfos) |
|
| Problem solved according to the fixlist(s) of the following version(s) |
| 9.7.0.3
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| 9.7.0.3
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