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https://issues.apache.org/jira/browse/SPARK-14951?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15259790#comment-15259790
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Apache Spark commented on SPARK-14951:
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User 'viirya' has created a pull request for this issue:
https://github.com/apache/spark/pull/12729
> Subexpression elimination in wholestage codegen version of TungstenAggregate
> ----------------------------------------------------------------------------
>
> Key: SPARK-14951
> URL: https://issues.apache.org/jira/browse/SPARK-14951
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Liang-Chi Hsieh
>
> Currently wholestage codegen version of TungstenAggregate does not support
> subexpression elimination. We should support it.
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