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https://issues.apache.org/jira/browse/ARROW-6219?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16905814#comment-16905814
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Micah Kornfield commented on ARROW-6219:
----------------------------------------

I think field selection certainly.  I'm not sure about row limit.  It some 
cases it can be a lot more efficient to not have a row-limit then doing 
repeated queries with row-limit and offset.  I'm guessing that 
https://issues.apache.org/jira/browse/ARROW-6202 is one case where a limit was 
not being used.

> [Java] Add API for JDBC adapter that can convert less then the full result 
> set at a time.
> -----------------------------------------------------------------------------------------
>
>                 Key: ARROW-6219
>                 URL: https://issues.apache.org/jira/browse/ARROW-6219
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: Java
>            Reporter: Micah Kornfield
>            Assignee: Ji Liu
>            Priority: Major
>
> Somehow we should configure number of rows per batch and either let clients 
> iterate or provide an iterator API.  Otherwise for large result sets we might 
> run out of memory.



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