DB2 FOR LUW / DB2FORLUW / A50 - DB2

Under rare scenarios, DB2 might produce a suboptimal query plan 
when the following conditions are satisfied: 
1) The query contains one or more EXISTS/IN subqueries 
2) The subquery references one or more column organized tables 
3) The outer query block for the subquery is complex and 
contains one or more outer join, UNION ALL and Group By clauses. 
 
eg. 
with V1 as ( 
Select count(*), C1, C2 
from T1 left join T2 on T1.C1 = T2.C1 
               inner join T3 on T1.C2 = T3.C2 
Group By C1,C2) 
Select * 
from V1 
where EXISTS (select 1 
                             from Tx 
                             where Tx.C1 = V1.C2)

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* USERS AFFECTED:                                              * 
* All                                                          * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* See Error Description                                        * 
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* RECOMMENDATION:                                              * 
* Upgrade to DB2 version 10.5.0.7                              * 
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Fixed in DB2 version 10.5.0.7

keiner bekannt / siehe Local-Fix

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

13.04.2015
05.02.2016
05.02.2016