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https://issues.apache.org/jira/browse/SPARK-7440?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14572361#comment-14572361
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Apache Spark commented on SPARK-7440:
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User 'rxin' has created a pull request for this issue:
https://github.com/apache/spark/pull/6637
> Remove physical Distinct operator in favor of Aggregate
> -------------------------------------------------------
>
> Key: SPARK-7440
> URL: https://issues.apache.org/jira/browse/SPARK-7440
> Project: Spark
> Issue Type: New Feature
> Components: SQL
> Reporter: Reynold Xin
>
> We can just rewrite distinct using groupby (i.e. aggregate operator).
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