DB2 FOR LUW / DB2FORLUW / 910 - DB2

If the following conditions are met: 
 
1) A query contains a "like" comparison, where the pattern to 
compare has prefixed characters followed by wildcard such as 
this example: 
select columns from table where pattern like "abc%" 
 
2) The data is in a mixed or EUC codepage 
 
3) The pattern "abc%" has a length that is greater than the 
column data that is being scanned. 
 
Then there exists the possibility that the comparison may do an 
invalid memory access that will crash the instance. In very tiny 
opportunity, a wrong result might return. 
 
If a stack traceback is generated, the function at the top of 
the stack will be an OS memory compare function (differs 
depending on platform, eg. intel_fast_memcmp on Intel platform) 
with sqlv_mixd_short_search() below it.

**************************************************************** 
* USERS AFFECTED:                                              * 
* ALL                                                          * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* If the following conditions are met:                         * 
*                                                              * 
* 1) A query contains a "like" comparison, where the pattern   * 
* to compare has prefixed characters followed by wildcard such * 
* as this example:                                             * 
*     select columns from table where pattern like "abc%"      * 
*                                                              * 
* 2) The data is in a mixed or EUC codepage                    * 
*                                                              * 
* 3) The pattern "abc%" has a length that is greater than the  * 
* column data that is being scanned.                           * 
*                                                              * 
* Then there exists the possibility that the comparison may do * 
* an invalid memory access that will crash the instance. In    * 
* very tiny opportunity, a wrong result might return.          * 
*                                                              * 
* If a stack traceback is generated, the function at the top   * 
* of the stack will be an OS memory compare function (differs  * 
* depending on platform, eg. intel_fast_memcmp on Intel        * 
* platform) with sqlv_mixd_short_search() below it.            * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Update to version 9.1 fixpack 11 or later fixpacks.          * 
****************************************************************

Use shorter string in the LIKE predicate if it is possible.

DB2 Version 9.1 Fix Pack 11  for Linux, UNIX and Windows
 DB2 Version 9.1 Fix Pack 12  for Linux, UNIX and Windows
 

This problem is first fixed in version 9.1 fixpack 11.

Use shorter string in the LIKE predicate if it is possible.

Datum - Problem gemeldet    :
Datum - Problem geschlossen :
Datum - der letzten Änderung:

20.09.2011
29.12.2011
29.12.2011

9.1.FP11