[teiid-issues] [JBoss JIRA] (TEIID-2245) Limit pushdown of nulls first/last

Fri Oct 5 09:42:03 EDT 2012

    [ https://issues.jboss.org/browse/TEIID-2245?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12724397#comment-12724397 ] 

Steven Hawkins commented on TEIID-2245:
---------------------------------------

Note that the second commit also further narrowed the pushdown affect to only user order bys.  Also for legacy branches it would be proper to default the pushdown property to true rather than false.

> Limit pushdown of nulls first/last
> ----------------------------------
>
>                 Key: TEIID-2245
>                 URL: https://issues.jboss.org/browse/TEIID-2245
>             Project: Teiid
>          Issue Type: Enhancement
>          Components: Query Engine
>    Affects Versions: 7.4.4
>            Reporter: Steven Hawkins
>            Assignee: Steven Hawkins
>            Priority: Critical
>             Fix For: 8.2
>
>
> By default Teiid will attempt to virtualize the default null order of nulls low.  This can have a negative impact on performance and is not needed in many situations.

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