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https://issues.apache.org/jira/browse/SPARK-13636?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15177146#comment-15177146
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Apache Spark commented on SPARK-13636:
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User 'viirya' has created a pull request for this issue:
https://github.com/apache/spark/pull/11484
> Direct consume UnsafeRow in wholestage codegen plans
> ----------------------------------------------------
>
> Key: SPARK-13636
> URL: https://issues.apache.org/jira/browse/SPARK-13636
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Liang-Chi Hsieh
>
> As shown in the wholestage codegen verion of Sort operator, when Sort is top
> of Exchange (or other operator that produce UnsafeRow), we will create
> variables from UnsafeRow, than create another UnsafeRow using these
> variables. We should avoid the unnecessary unpack and pack variables from
> UnsafeRows.
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