[teiid-issues] [JBoss JIRA] (TEIID-4498) Generalize subquery batch processing

[Steven Hawkins (Jira)]

    [ https://issues.jboss.org/browse/TEIID-4498?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13672838#comment-13672838 ] 

Steven Hawkins commented on TEIID-4498:
---------------------------------------

I can't make this work easily with the existing logic - it presumes that the subquery will drive a dependent join.  With a project subquery we need the reverse.  Dependent access nodes currently don't cross subplans.  So either I need to rewrite the logic to line the plan or take another approach.

> Generalize subquery batch processing
> ------------------------------------
>
>                 Key: TEIID-4498
>                 URL: https://issues.jboss.org/browse/TEIID-4498
>             Project: Teiid
>          Issue Type: Enhancement
>          Components: Query Engine
>            Reporter: Steven Hawkins
>            Assignee: Steven Hawkins
>            Priority: Major
>             Fix For: 12.0
>
>
> For subqueries that cannot be unnested, but can be modified to project their correlation, we should have at least batch processing rather than the row by row default.



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