[teiid-issues] [JBoss JIRA] (TEIID-1990) UNION pushdown

[Steven Hawkins (JIRA)]

     [ https://issues.jboss.org/browse/TEIID-1990?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steven Hawkins closed TEIID-1990.
---------------------------------


    
> UNION pushdown
> --------------
>
>                 Key: TEIID-1990
>                 URL: https://issues.jboss.org/browse/TEIID-1990
>             Project: Teiid
>          Issue Type: Bug
>          Components: Query Engine
>    Affects Versions: 7.7
>            Reporter: Mark Addleman
>            Assignee: Steven Hawkins
>             Fix For: 7.7.1, 8.0
>
>         Attachments: plan.txt, plan.txt
>
>
> I have SQL of the form
> SELECT a FROM (
>    SELECT a FROM ds.t1 UNION
>    SELECT a FROM ds.t2
> ) t
> The execution factory extends JDBCExecutionFactory and supports everything except row offset.  It appears that the two unioned SELECTs are being executed as separate statements rather than the entire unioned set being pushed down to the datasource.
> Attached is plan

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