|
Problem IC62213
|
Status: Geschlossen |
THE SQL QUERY OPTIMIZER MAY ADD AN UNNECESSARY TABLE QUEUE OPERATION UNDER CERTAIN CONDITIONS |
| Produkt: |
DB2 FOR LUW / DB2FORLUW / 950 - DB2 |
| Problembeschreibung: |
In a DPF environment, the optimizer may choose to perform an
unnecessary table queue operation which may lead to a
non-optimal query execution plan. This can occur if a table
that is hash partitioned across multiple database partitions is
referenced in a statement with multiple joins, and the table's
partitioning key is not of interest to the query. For example,
the partitioning key is not part of any join, nor a group by or
order by clause. |
| Problem-Zusammenfassung: |
****************************************************************
* USERS AFFECTED: *
* ALL *
****************************************************************
* PROBLEM DESCRIPTION: *
* In a DPF environment, the optimizer may choose to perform an *
* unnecessary table queue operation which may lead to a *
* non-optimal query execution plan. This can occur if a table *
* that is hash partitioned across multiple database partitions *
* is referenced in a statement with multiple joins, and the *
* table's *
* partitioning key is not of interest to the query. For *
* example, the partitioning key is not part of any join, nor a *
* group by or order by clause. *
****************************************************************
* RECOMMENDATION: *
* Upgrade To DB2 Version 9.5 Fix Pack 6 *
**************************************************************** |
| Local-Fix: |
|
| verfügbare FixPacks: |
DB2 Version 9.5 Fix Pack 6a for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 7 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 8 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 9 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 10 for Linux, UNIX, and Windows
|
| Lösung |
First Fixed In DB2 Version 9.5 Fix Pack 6 |
| Workaround |
keiner bekannt / siehe Local-Fix |
| Bug-Verfolgung |
Vorgänger : APAR is sysrouted TO one or more of the following: IC62473 IC62474 IC62475 IC68455
Nachfolger : |
| Weitere Daten |
Datum - Problem gemeldet :
Datum - Problem geschlossen :
Datum - der letzten Änderung:
| 24.07.2009
14.10.2010
14.10.2010 |
| Problem behoben ab folgender Versionen (IBM BugInfos) |
9.5.FP6
|
| Problem behoben lt. FixList in der Version |
