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DB2 - Problembeschreibung

Problem IC85887 Status: Geschlossen

INCONSISTENCY IN FILTER FACTOR CALCULATION FOR RANGE PREDICATES VALUES THAT
ARE BEYOND THE LAST HISTOGRAM

Produkt:
DB2 FOR LUW / DB2FORLUW / A10 - 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 Version 10.1 Fix Pack 2                            * 
****************************************************************
Local-Fix:
Use an equality predicate if it is logically equivalent to a set 
of range predicates
Lösung
Fixed in Version 10.1 Fix Pack 2
Workaround
keiner bekannt / siehe Local-Fix
Weitere Daten
Datum - Problem gemeldet    :
Datum - Problem geschlossen :
Datum - der letzten Änderung:
14.08.2012
18.12.2012
18.12.2012
Problem behoben ab folgender Versionen (IBM BugInfos)
Problem behoben lt. FixList in der Version