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https://issues.apache.org/jira/browse/SPARK-7462?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14537494#comment-14537494
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Patrick Wendell commented on SPARK-7462:
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[~rxin] since this is a user facing change can you post a before-and-after
example in this JIRA? I had to go look at the unit tests to figure out what
this meant.
> By default retain group by columns in aggregate
> -----------------------------------------------
>
> Key: SPARK-7462
> URL: https://issues.apache.org/jira/browse/SPARK-7462
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Reporter: Reynold Xin
> Assignee: Reynold Xin
> Priority: Blocker
>
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