[teiid-issues] [JBoss JIRA] Resolved: (TEIID-545) add join expression distinct detection

Mon May 4 09:48:46 EDT 2009

     [ https://jira.jboss.org/jira/browse/TEIID-545?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steven Hawkins resolved TEIID-545.
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    Resolution: Done

added both metadata and sortutility based detection of distinct join expressions.

> add join expression distinct detection
> --------------------------------------
>
>                 Key: TEIID-545
>                 URL: https://jira.jboss.org/jira/browse/TEIID-545
>             Project: Teiid
>          Issue Type: Feature Request
>          Components: Query Engine
>    Affects Versions: 6.0.0
>            Reporter: Steven Hawkins
>            Assignee: Steven Hawkins
>             Fix For: 6.1.0
>
>
> for better join performance it would be good to know when the join expressions are unique.  For pushdowns this can be obtained from the metadata otherwise the sortutility can be modified to detect uniqueness.

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