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https://issues.apache.org/jira/browse/SPARK-9083?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-9083:
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Assignee: Wenchen Fan (was: Apache Spark)
> If order by clause has non-deterministic expressions, we should add a project
> to materialize results of these expressions
> --------------------------------------------------------------------------------------------------------------------------
>
> Key: SPARK-9083
> URL: https://issues.apache.org/jira/browse/SPARK-9083
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Reporter: Yin Huai
> Assignee: Wenchen Fan
>
> When a order by clause has a non-deterministic expression, we actually
> evaluate it twice, once in the exchange operator when we try to figure out
> the range partitioner's boundaries and once in the sort operator. We should
> use a project to materialize the result first.
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