DB2 - Problembeschreibung
Problem IT09137 | Status: Geschlossen |
WRONG RESULT FROM STATEMENT WITH TWO OR MORE OLAP FUNCTIONS WITH COMPATIBLE PARTITION-BY CLAUSES WITH ONE EQUATING TO CONSTANTS | |
Produkt: | |
DB2 FOR LUW / DB2FORLUW / A10 - DB2 | |
Problembeschreibung: | |
This problem only occurs in a DPF or SMP parallelism enabled environment. You might encounter an incorrect result set for a SQL statement that contains two or more OLAP functions with compatible partition-by clauses wherein at least one OLAP function contains a partition-by clause where all columns equate to constant values. A column can equate to a constant value by specifying the constant values explicitly in the partition by clause or the columns in the partition by clause are referenced in equality predicates that equate to constants. The following example specifies the constant value explicitly SELECT ... SUM(X) OVER (PARTITION BY 1 ...) ... and the following example references the partition by column in an equality predicate SELECT ... SUM(X) OVER (PARTITION BY Y ...) ... WHERE Y = 1 ... | |
Problem-Zusammenfassung: | |
**************************************************************** * USERS AFFECTED: * * DPF or SMP parallelism enabled environments * **************************************************************** * PROBLEM DESCRIPTION: * * See Error Description * **************************************************************** * RECOMMENDATION: * * Upgrade to DB2 version 10.1.0.5. * **************************************************************** | |
Local-Fix: | |
You can rewrite your query to move the OLAP function with constant partition-by clause into a nested table expression. For example, if you have two compatible OLAP functions in a query as follows: SELECT SUM(X) OVER (PARTITION BY A), SUM(Y) OVER (PARTITION BY A,B) FROM T1 WHERE T1.A=1 then you can rewrite it as a nested table expression to avoid the incorrect result: SELECT SUMX, SUM(Y) OVER (PARTITION BY A,B) FROM (SELECT A,B,Y, SUM(X) OVER (PARTITION BY A) SUMX FROM T1 WHERE A=1) AS TMP | |
Lösung | |
The problem is first fixed in DB2 version 10.1.0.5. | |
Workaround | |
keiner bekannt / siehe Local-Fix | |
Weitere Daten | |
Datum - Problem gemeldet : Datum - Problem geschlossen : Datum - der letzten Änderung: | 27.05.2015 27.05.2015 10.07.2015 |
Problem behoben ab folgender Versionen (IBM BugInfos) | |
Problem behoben lt. FixList in der Version | |
10.1.0.5 |