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https://issues.apache.org/jira/browse/SPARK-12768?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-12768:
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Assignee: Apache Spark (was: Reynold Xin)
> Remove CaseKeyWhen expression
> -----------------------------
>
> Key: SPARK-12768
> URL: https://issues.apache.org/jira/browse/SPARK-12768
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Reporter: Reynold Xin
> Assignee: Apache Spark
>
> CaseKeyWhen was added to improve the performance of "case a when ..." when we
> did not have common subexpression elimination. We now have that so we can
> remove CaseKeyWhen.
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