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

[Steven Hawkins (Jira)]

     [ https://issues.redhat.com/browse/TEIID-5937?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steven Hawkins resolved TEIID-5937.
-----------------------------------
    Fix Version/s: 14.0
                   13.0.3
                   13.1
       Resolution: Done


Added logic to prevent projection conflicts across branches of unions and joins when dealing with projected literals.

> 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
>            Priority: Blocker
>             Fix For: 14.0, 13.0.3, 13.1
>
>   Original Estimate: 4 hours
>  Remaining Estimate: 4 hours
>
> 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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