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https://issues.apache.org/jira/browse/SPARK-9469?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14648309#comment-14648309
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Apache Spark commented on SPARK-9469:
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User 'rxin' has created a pull request for this issue:
https://github.com/apache/spark/pull/7803
> TungstenSort should not do safe -> unsafe conversion itself
> -----------------------------------------------------------
>
> Key: SPARK-9469
> URL: https://issues.apache.org/jira/browse/SPARK-9469
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Reporter: Reynold Xin
> Assignee: Reynold Xin
> Priority: Critical
>
> TungstenSort itself assumes input rows are safe rows, and uses a projection
> to turn the safe rows into UnsafeRows. We should take that part of the logic
> out of TungstenSort, and let the planner take care of the conversion. In that
> case, if the input is UnsafeRow already, no conversion is needed.
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