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https://issues.apache.org/jira/browse/SPARK-17655?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15518175#comment-15518175
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Apache Spark commented on SPARK-17655:
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User 'yaooqinn' has created a pull request for this issue:
https://github.com/apache/spark/pull/15227
> [SQL]Remove unused variables declarations and definations in a
> WholeStageCodeGened stage
> ----------------------------------------------------------------------------------------
>
> Key: SPARK-17655
> URL: https://issues.apache.org/jira/browse/SPARK-17655
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Kent Yao
> Priority: Minor
>
> A WholeStageCodeGened stage with multiple CodegenSupport Operators generates
> unused result rows and their associated buffer holders and row writers, which
> can be removed.
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