|
Problem IC61599
|
Status: Geschlossen |
ENHANCE FACTORIZATION OF A COMPLEX TYPE OF OR PREDICATE |
| Produkt: |
DB2 FOR LUW / DB2FORLUW / 970 - DB2 |
| Problembeschreibung: |
This fix improves the predicate factorization of OR predicate
whose all subterms have exactly matched clause. Given an example
predicate
(((col1 = 1 and col2 = 2) or col1 >= 100) and col3 = 3) or
(((col1 = 1 and col2 = 2) or col1 >= 100) and col4 = 4)
, this fix will rewrite the predicate to
((col1 = 1 and col2 = 2) or col1 >= 100) and (col3 = 3 or col4 =
4).
Here, the exactly matched clause is mixed with OR and AND. The
comparison can be any type including >=, >, =, <, <=, IS NULL,
IS NOT NULL, IN, etc. Both comparison operands can be literal
including special register and host variable, single base table
column, or expressions. |
| Problem-Zusammenfassung: |
****************************************************************
* USERS AFFECTED: *
* db2 V9.5 & db2 v9.7 *
****************************************************************
* PROBLEM DESCRIPTION: *
* ENHANCE FACTORIZATION OF A COMPLEX TYPE OF OR PREDICATE. *
* *
* This fix improves the predicate factorization of OR *
* predicate *
* whose all subterms have exactly matched clause. Given an *
* example *
* predicate *
* *
* (((col1 = 1 and col2 = 2) or col1 >= 100) and col3 = 3) or *
* *
* (((col1 = 1 and col2 = 2) or col1 >= 100) and col4 = 4) *
* *
* , this fix will rewrite the predicate to *
* *
* ((col1 = 1 and col2 = 2) or col1 >= 100) and (col3 = 3 or *
* col4 = *
* 4). *
* *
* *
* *
* Here, the exactly matched clause is mixed with OR and AND. *
* The *
* comparison can be any type including >=, >, =, <, <=, IS *
* NULL, *
* IS NOT NULL, IN, etc. Both comparison operands can be *
* literal *
* including special register and host variable, single base *
* table *
* column, or expressions. *
****************************************************************
* RECOMMENDATION: *
* Please upgrde to v9.7 fixpack 1 *
**************************************************************** |
| Local-Fix: |
|
| verfügbare FixPacks: |
DB2 Version 9.7 Fix Pack 1 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 2 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 3 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 3a for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 4 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 5 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 7 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 9a for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 6 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 10 for Linux, UNIX, and Windows
|
| Lösung |
Fix included in v9.7 fixpack 1. |
| Workaround |
keiner bekannt / siehe Local-Fix |
| Weitere Daten |
Datum - Problem gemeldet :
Datum - Problem geschlossen :
Datum - der letzten Änderung:
| 20.06.2009
14.01.2010
14.01.2010 |
| Problem behoben ab folgender Versionen (IBM BugInfos) |
9.7.FP1
|
| Problem behoben lt. FixList in der Version |
| 9.7.0.1
|
 |
