DB2 - Problembeschreibung
Problem IC90012 | Status: Geschlossen |
IN2JOIN OPTIMIZATION GUIDELINE IS NOT APPLIED TO REWRITE IN PREDICATE TO A JOIN | |
Produkt: | |
DB2 FOR LUW / DB2FORLUW / 970 - DB2 | |
Problembeschreibung: | |
In certain conditions, DB2 does not apply the IN-LIST-to-join query rewrite when the optimization guideline IN2JOIN is specified. For example: In the SQL statement below SELECT ... FROM PARTS P, SUPPLIERS S, PARTSUPP PS WHERE P.PARTKEY = PS.PS_PARTKEY AND S.S_SUPPKEY = PS.PS_SUPPKEY AND P_SIZE IN (?, ?, ?, ...) AND ... and an optimization guideline <OPTGUIDELINES><INLIST2JOIN TABLE='P' COLUMN='P_SIZE'/></OPTGUIDELINES> is specified. The statistics information of the table P and the columns in the table are not sufficient to indicate that the IN-LIST-to-join will outperform other optimization techniques. However, when the optimization guideline IN2JOIN is specified, DB2 should apply the optimization regardless of the outcome from the analysis of the statistics information. | |
Problem-Zusammenfassung: | |
**************************************************************** * USERS AFFECTED: * * ALL * **************************************************************** * PROBLEM DESCRIPTION: * * See Error Description * **************************************************************** * RECOMMENDATION: * * Upgrade to DB2 V9.7 FP9 * **************************************************************** | |
Local-Fix: | |
verfügbare FixPacks: | |
DB2 Version 9.7 Fix Pack 9 for Linux, UNIX, and Windows | |
Lösung | |
Fixed in DB2 V9.7 FP9 | |
Workaround | |
keiner bekannt / siehe Local-Fix | |
Bug-Verfolgung | |
Vorgänger : APAR is sysrouted TO one or more of the following: IC91788 Nachfolger : | |
Weitere Daten | |
Datum - Problem gemeldet : Datum - Problem geschlossen : Datum - der letzten Änderung: | 04.02.2013 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 |