DB2 - Problembeschreibung
Problem IC85858 | Status: Geschlossen |
INCONSISTENCY IN FILTER FACTOR CALCULATION FOR RANGE PREDICATES VALUES THAT ARE BEYOND THE LAST HISTOGRAM | |
Produkt: | |
DB2 FOR LUW / DB2FORLUW / 970 - DB2 | |
Problembeschreibung: | |
When range predicate literal values are beyond the highest quantile value, filter factor calculation may be incorrect. For example, suppose the highest quantile value for the column DATE is '2012-07-25'. Range predicates (DATE >= '2012-07-25' and DATE < '2012-07-26') can result in a combined FF of almost 0 rather than the FF of the equality predicate DATE = '2012-07-25'. | |
Problem-Zusammenfassung: | |
**************************************************************** * USERS AFFECTED: * * All * **************************************************************** * PROBLEM DESCRIPTION: * * See Error Description * **************************************************************** * RECOMMENDATION: * * Update to v9.7 Fix Pack 8 * **************************************************************** | |
Local-Fix: | |
Use an equality predicate if it is logically equivalent to a set of range predicates | |
verfügbare FixPacks: | |
DB2 Version 9.7 Fix Pack 8 for Linux, UNIX, and Windows | |
Lösung | |
First fixed in v9.7 Fix Pack 8 | |
Workaround | |
keiner bekannt / siehe Local-Fix | |
Bug-Verfolgung | |
Vorgänger : APAR is sysrouted TO one or more of the following: IC85887 Nachfolger : | |
Weitere Daten | |
Datum - Problem gemeldet : Datum - Problem geschlossen : Datum - der letzten Änderung: | 13.08.2012 15.04.2013 15.04.2013 |
Problem behoben ab folgender Versionen (IBM BugInfos) | |
9.7.FP8 | |
Problem behoben lt. FixList in der Version | |
9.7.0.8 |