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https://issues.apache.org/jira/browse/SPARK-10988?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14947817#comment-14947817
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Apache Spark commented on SPARK-10988:
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User 'JoshRosen' has created a pull request for this issue:
https://github.com/apache/spark/pull/9015
> Reduce duplication in Aggregate2's expression rewriting logic
> -------------------------------------------------------------
>
> Key: SPARK-10988
> URL: https://issues.apache.org/jira/browse/SPARK-10988
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Reporter: Josh Rosen
> Assignee: Josh Rosen
>
> In `aggregate/utils.scala`, there is a substantial amount of duplication in
> the expression-rewriting logic. As a prerequisite to supporting imperative
> aggregate functions in `TungstenAggregate`, we should refactor this file so
> that the same expression-rewriting logic is used for both `SortAggregate` and
> `TungstenAggregate`.
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