[teiid-issues] [JBoss JIRA] (TEIID-2338) common table expression performance

Wed Jan 2 10:23:08 EST 2013

    [ https://issues.jboss.org/browse/TEIID-2338?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12743175#comment-12743175 ] 

Steven Hawkins commented on TEIID-2338:
---------------------------------------

This logic would also be applicable to staging tables in xml planning.

> common table expression performance
> -----------------------------------
>
>                 Key: TEIID-2338
>                 URL: https://issues.jboss.org/browse/TEIID-2338
>             Project: Teiid
>          Issue Type: Enhancement
>          Components: Query Engine
>            Reporter: Steven Hawkins
>            Assignee: Steven Hawkins
>
> Large common table expressions should be indexed based upon their usage in the query to improve performance.
> Also given that we will now back-off of bad dependent joins, we should be more optimistic with using common tables as dependent joins (which would also reduce the need for an index).

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