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https://issues.apache.org/jira/browse/ARROW-12439?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17460855#comment-17460855
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Joris Van den Bossche commented on ARROW-12439:
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Should this be moved to https://github.com/apache/arrow-rs/ or
https://github.com/apache/arrow-datafusion?
> [Rust] [DataFusion] Add support for eliminating hash repartition
> ----------------------------------------------------------------
>
> Key: ARROW-12439
> URL: https://issues.apache.org/jira/browse/ARROW-12439
> Project: Apache Arrow
> Issue Type: Bug
> Reporter: Daniël Heres
> Priority: Major
>
> If the intermediate data is already partitioned on a certain expression
> (key), the repartition doesn't have to be added (in a join), or should be
> removed in an optimization rule. This will avoid having to repartition (and
> maybe shuffle in Ballista).
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