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https://issues.apache.org/jira/browse/DRILL-3390?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14616298#comment-14616298
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Tony Du commented on DRILL-3390:
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I think JOIN and GROUP BY are also needed.
> Push down aggregate operations to source db
> -------------------------------------------
>
> Key: DRILL-3390
> URL: https://issues.apache.org/jira/browse/DRILL-3390
> Project: Apache Drill
> Issue Type: Sub-task
> Components: Storage - Other
> Reporter: Magnus Pierre
> Assignee: Jacques Nadeau
> Original Estimate: 336h
> Remaining Estimate: 336h
>
> Aggregate operations such as sum, and count should be pushed down to source
> db whenever convenient.
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