[teiid-issues] [JBoss JIRA] Updated: (TEIID-1473) Don't batch more rows than is needed when query contains limit but translator does not support limit
Steven Hawkins (JIRA)
jira-events at lists.jboss.org
Fri Mar 4 12:36:45 EST 2011
[ https://issues.jboss.org/browse/TEIID-1473?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Steven Hawkins updated TEIID-1473:
----------------------------------
Fix Version/s: 7.4
Component/s: Query Engine
> Don't batch more rows than is needed when query contains limit but translator does not support limit
> ----------------------------------------------------------------------------------------------------
>
> Key: TEIID-1473
> URL: https://issues.jboss.org/browse/TEIID-1473
> Project: Teiid
> Issue Type: Enhancement
> Components: Query Engine
> Reporter: Howard Abrams
> Assignee: Steven Hawkins
> Priority: Minor
> Fix For: 7.4
>
>
> Teiid shouldn't try to batch more rows than is needed when query contains limit and translator does not support limit.
> For example, say there is a translator that exposes a table "A", but does not support limit.
> select * from A limit 2
> will currently select an entire batch of rows (1024?) from A, instead of just stopping after 2 rows.
> Likewise, if the translator supports neither offset nor limit, and the query contains both, Teiid should not try to batch more that (offset + limit) rows.
> This is marked as "Minor" because the workaround of naively supporting limit and offset within a translator is not too hard.
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