DB2 - Problembeschreibung
Problem IC83902 | Status: Geschlossen |
QUERY PERFORMANCE ISSUE DUE TO STATISTICS PREVENTING PUSHDOWN OF JOINS | |
Produkt: | |
DB2 FOR LUW / DB2FORLUW / 970 - DB2 | |
Problembeschreibung: | |
Query containing UNION ALL join, may perform badly due to statistics which prevent the push down of joins. This is a costing issue. The push-down makes progress only when query rewrite thinks the estimated join cardinality is not more than the outer LEFT OUTER JOIN. | |
Problem-Zusammenfassung: | |
**************************************************************** * USERS AFFECTED: * * All users on DB2 V97 FP8 and earlier * **************************************************************** * PROBLEM DESCRIPTION: * * See Error Description * **************************************************************** * RECOMMENDATION: * * Upgrade to DB2 V97 FP9 * **************************************************************** | |
Local-Fix: | |
verfügbare FixPacks: | |
DB2 Version 9.7 Fix Pack 9 for Linux, UNIX, and Windows | |
Lösung | |
First Fixed in DB2 V97 FP9 | |
Workaround | |
keiner bekannt / siehe Local-Fix | |
Bug-Verfolgung | |
Vorgänger : APAR is sysrouted TO one or more of the following: IC97757 IC97760 Nachfolger : | |
Weitere Daten | |
Datum - Problem gemeldet : Datum - Problem geschlossen : Datum - der letzten Änderung: | 01.06.2012 17.12.2013 17.12.2013 |
Problem behoben ab folgender Versionen (IBM BugInfos) | |
9.7.FP9 | |
Problem behoben lt. FixList in der Version | |
9.7.0.9 | |
9.7.0.9 |