|
Problem IC91418
|
Status: Closed |
USER-DEFINED FUNCTION WITH INDEX EXTENSION EXPLOITATION MIGHT RETURN INCORRECT RESULTS IF INDEX IS NOT PRESENT |
| product: |
DB2 FOR LUW / DB2FORLUW / A10 - DB2 |
| Problem description: |
The following is an example of a UDF which might return
incorrect results:
CREATE FUNCTION PSearch (a pair, b pair)
RETURNS Integer
LANGUAGE SQL
DETERMINISTIC
NO EXTERNAL ACTION
PREDICATES
(
WHEN = 1
SEARCH BY EXACT INDEX EXTENSION PairExt
WHEN KEY (a) USE RetrieveKey (b)
WHEN KEY (b) USE RetrieveKey (a)
)
RETURN (0)
The following is a query using the UDF as a predicate:
SELECT * FROM mytable AS a
WHERE PSearch(a.column, 1) = 1
If the index does not exist, the SEARCH BY expression is not
processed and the function PSearch returns the value 0 which
results in no rows being returned. Due to the error in function
processing, all table rows might be returned. |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* ALL *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Upgrade to DB2 Version 10.1 Fix Pack 3 *
**************************************************************** |
| Local Fix: |
Ensure that the index exists if the function is intended to be
used with a table that has a defined index extension. |
| available fix packs: |
DB2 Version 10.1 Fix Pack 3 for Linux, UNIX, and Windows
DB2 Version 10.1 Fix Pack 4 for Linux, UNIX, and Windows
DB2 Version 10.1 Fix Pack 3a for Linux, UNIX, and Windows
DB2 Version 10.1 Fix Pack 6 for Linux, UNIX, and Windows
|
| Solution |
Upgrade to DB2 Version 10.1 Fix Pack 3 |
| Workaround |
not known / see Local fix |
| BUG-Tracking |
forerunner : APAR is sysrouted TO one or more of the following: IC96922
follow-up : |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 08.04.2013
27.09.2013
27.09.2013 |
| Problem solved at the following versions (IBM BugInfos) |
|
| Problem solved according to the fixlist(s) of the following version(s) |
| 10.1.0.3
|
 |
| 10.1.0.3
|
|
