[teiid-issues] [JBoss JIRA] (TEIID-4813) Basic support for joins in OData v2

[Damien B (JIRA)]

Damien B created TEIID-4813:
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             Summary: Basic support for joins in OData v2
                 Key: TEIID-4813
                 URL: https://issues.jboss.org/browse/TEIID-4813
             Project: Teiid
          Issue Type: Bug
          Components: OData
            Reporter: Damien B
            Assignee: Steven Hawkins


It's half a bug, half a feature request :-)
We deal with a perticular OData almost v2 server that uses system functions disguised as entitities. Basically, "/A('b')/C" works but not "/C?$filter=foo eq 'b'". In order to have that, we've enabled the joins support on the ODataTranslator, but we still haven't the right query generated. We've traced back the origin to the optimizer:
* SELECT * FROM a join b ON a.x=b.y WHERE a.x='v'
* is optimized as SELECT <columns> FROM a join b ON a.x=b.y WHERE a.x='v' AND b.y='v'

The extra induced condition "b.y = 'v'" messes up  with the URL construction. Any idea about how to proceed from there?



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