DB2 FOR LUW / DB2FORLUW / A10 - DB2

Complex query might return incorrectly sorted rows in situation 
when following conditions are met: 
 
- there is DISTINCT clause in the top SELECT of a query; 
- there is ORDER BY and/or FETCH FIRST n ROWS ONLY clause. 
 
Query snippet: 
 
SELECT DISTINCT ... 
FROM ... 
WHERE ... = ( SELECT ...) 
ORDER BY ... 
 
This query might return incorrect results.

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* USERS AFFECTED:                                              * 
* ALL                                                          * 
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* PROBLEM DESCRIPTION:                                         * 
* See Error Description                                        * 
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* RECOMMENDATION:                                              * 
* Upgrade to DB2 Version 10.1 and Fix Pack 5                   * 
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SELECT DISTINCT should be separated from the ORDER BY: 
 
Query snippet: 
 
SELECT * 
 FROM ( 
  SELECT DISTINCT ... 
  FROM ... 
  WHERE ... = ( SELECT ... ) 
 ) 
ORDER BY...

Problem was first fixed in DB2 Version 10.1 and Fix Pack 5

not known / see Local fix

Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :

05.11.2014
16.07.2015
16.07.2015