DB2 FOR LUW / DB2FORLUW / A50 - DB2

## Problem description
The Explanation for SQL0338N needs to be updated after an
enhancement has been made since 10.1 to allow subqueries in an
ON clause under some circumstances.

## How to reproduce the problem
The following query returns SQL0338N in 9.7, but succeeds in
10.1 onward.
It's because there is an enhancement made since 10.1. The
explanation of SQL0338N in 10.1 onward is still the same as in
9.7 and therefore a bit misleading to the user.
----------------------------------
CREATE TABLE TEST01(C1 INTEGER);
CREATE TABLE TEST02(C1 INTEGER);
CREATE TABLE TEST03(C1 INTEGER);

INSERT INTO TEST01 VALUES(1);
INSERT INTO TEST02 VALUES(1);
INSERT INTO TEST03 VALUES(1);

SELECT *
FROM TEST01 T1
LEFT OUTER JOIN TEST02 T2
ON T1.C1 = T2.C1
AND T2.C1 = (SELECT C1 FROM TEST03);
----------------------------------

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* USERS AFFECTED:                                              *
* ALL                                                          *
****************************************************************
* PROBLEM DESCRIPTION:                                         *
* See Error Description                                        *
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* RECOMMENDATION:                                              *
* Upgrade to Db2 version 10.5 fix pack 10                      *
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not known / see Local fix

forerunner  : 
follow-up : IT24702 

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

11.01.2018
18.07.2018
18.07.2018