|
Problem IC64062
|
Status: Geschlossen |
DB2 OPTIMIZER CARDINALITY ESTIMATE IMPROVEMENT FOR "IS NOT NULL" PREDICATE |
| Produkt: |
DB2 FOR LUW / DB2FORLUW / 970 - DB2 |
| Problembeschreibung: |
Improve optimizer cardinality estimate when we have an
"AND col IS NOT NULL" predicate on a column that is also
referenced by another local predicate e.g.:
COL <> literal AND COL IS NOT NULL
Note: If the predicate operator is "=", we will remove the
redundant IS NOT NULL predicate. |
| Problem-Zusammenfassung: |
Users Affected: ALL
Problem Description: See Error Description.
Problem Summary: See Error Description. |
| Local-Fix: |
|
| verfügbare FixPacks: |
DB2 Version 9.7 Fix Pack 1 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 2 for Linux, UNIX, and Windows
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 7 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 9a for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 6 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 8 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
|
| Lösung |
First fixed in DB2 UDB Version 9.7, FixPak 1 (build s091114) |
| Workaround |
keiner bekannt / siehe Local-Fix |
| Weitere Daten |
Datum - Problem gemeldet :
Datum - Problem geschlossen :
Datum - der letzten Änderung:
| 22.10.2009
15.12.2009
15.12.2009 |
| Problem behoben ab folgender Versionen (IBM BugInfos) |
9.7.
|
| Problem behoben lt. FixList in der Version |
| 9.7.0.1
|
 |
