[teiid-issues] [JBoss JIRA] (TEIID-2885) Allow dependent join pushdown to be chosen by the planner
Steven Hawkins (JIRA)
issues at jboss.org
Wed Jun 17 12:30:02 EDT 2015
[ https://issues.jboss.org/browse/TEIID-2885?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13080473#comment-13080473 ]
Steven Hawkins commented on TEIID-2885:
---------------------------------------
dependentJoinPushdownThreshold has been removed for 8.11. That will give the optimizer more flexibility in utilizing full pushdown. Also the hints will be updated to prevent that if needed.
> Allow dependent join pushdown to be chosen by the planner
> ---------------------------------------------------------
>
> Key: TEIID-2885
> URL: https://issues.jboss.org/browse/TEIID-2885
> Project: Teiid
> Issue Type: Enhancement
> Components: Query Engine
> Reporter: Steven Hawkins
> Assignee: Steven Hawkins
> Fix For: 8.8, 8.7.1
>
>
> As a follow on to TEIID-2249, the planner should be able to choose when to use full join pushdown, rather than only relying upon a hint. One downside to this currently is that there isn't a good way to do a back off to a different join processing (unless we embedded an alternative plan) and so we may have to add failure logic if too many independent values are retrieved.
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