[teiid-issues] [JBoss JIRA] (TEIID-5937) Union All followed by except returns wrong results

[Dmitrii Pogorelov (Jira)]

Dmitrii Pogorelov created TEIID-5937:
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             Summary: Union All followed by except returns wrong results
                 Key: TEIID-5937
                 URL: https://issues.redhat.com/browse/TEIID-5937
             Project: Teiid
          Issue Type: Bug
          Components: Query Engine
    Affects Versions: 13.1
            Reporter: Dmitrii Pogorelov
            Assignee: Steven Hawkins


The following queries return wrong results:
{code:sql}
-- <null> though should return 1 
select * from views.test2 except select * from views.test1
UNION ALL
select * from views.test1 except select * from views.test2 ;;
 
-- <null> though should return 1
(select * from views.test2 except select * from views.test1
UNION ALL
select * from views.test1) except select * from views.test2 ;;
{code}



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