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DB2 - Problembeschreibung

Problem IC80061 Status: Geschlossen

OPTIMIZER INCORRECT RESULTS FOR JOIN WITH REDUNDANT PREDICATES ON DPF

Produkt:
DB2 FOR LUW / DB2FORLUW / 970 - DB2
Problembeschreibung:
Different results for a query on DPF and non-DPF systems 
 
 
The following query returns no rows on non DPF , but 
incorrectly 2 rows on DPF 
 
WITH val (a1)   AS (VALUES ('')) ,def (a2,b2) AS (VALUES 
('dsf',''), 
('tsx','')) ,sel AS ( SELECT val.a1 ,'' AS c FROM val LEFT OUTER 
JOIN 
def ON def.a2 = '' ) SELECT def.a2 ,sel.a1 ,sel.c FROM def INNER 
JOIN 
sel ON def.a2 = sel.a1 AND def.b2 = '' ; 
 
 
(no tables required )
Problem-Zusammenfassung:
**************************************************************** 
* USERS AFFECTED:                                              * 
* ALL                                                          * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* See Error Description                                        * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Upgrade to DB2 version 9.7 Fix Pack 6                        * 
****************************************************************
Local-Fix:
set optimization level 1
verfügbare FixPacks:
DB2 Version 9.7 Fix Pack 6 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 7 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 9a for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 10 for Linux, UNIX, and Windows

Lösung
This APAR is fixed in DB2 version 9.7 Fix Pack 6.
Workaround
keiner bekannt / siehe Local-Fix
Weitere Daten
Datum - Problem gemeldet    :
Datum - Problem geschlossen :
Datum - der letzten Änderung:
29.11.2011
12.06.2012
12.06.2017
Problem behoben ab folgender Versionen (IBM BugInfos)
9.7.FP6
Problem behoben lt. FixList in der Version
9.7.0.6 FixList