[teiid-issues] [JBoss JIRA] (TEIID-2473) WHERE clause with contradicting condition should return no rows

Tue Apr 16 11:38:54 EDT 2013

     [ https://issues.jboss.org/browse/TEIID-2473?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steven Hawkins resolved TEIID-2473.
-----------------------------------

    Resolution: Duplicate Issue


Duplicate of TEIID-2366
                
> WHERE clause with contradicting condition should return no rows
> ---------------------------------------------------------------
>
>                 Key: TEIID-2473
>                 URL: https://issues.jboss.org/browse/TEIID-2473
>             Project: Teiid
>          Issue Type: Feature Request
>          Components: Query Engine
>    Affects Versions: 8.1
>         Environment: JZOS mainframe
>            Reporter: Jeff Hayes
>            Assignee: Steven Hawkins
>            Priority: Minor
>
> Using Eclipse datasource explorer with teiid connection using SHOWPLAN to demonstrate the problem. 
> Enter: SELECT * FROM SECURITY.SYSINFO WHERE SYSID = 'DE29 AND SYSID <> 'DE29'
> USER COMMAND appears as: SELECT * FROM SECURITY.SYSINFO WHERE SYSID = 'DE29
> Apparently conflicting "AND SYSID <> 'DE29'" is dropped and I get results from SYSID = 'DE29'.
> Enter: SELECT * FROM SECURITY.SYSINFO WHERE SYSID <> 'DE29' AND SYSID = 'DE29'
> USER COMMAND appears as: SELECT * FROM SECURITY.SYSINFO WHERE 1 = 0
> And I get expected null result set. 
> Admittedly irrational query but it should give empty result set however you order the WHERE clause conditions. 
>  

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