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https://issues.apache.org/jira/browse/SPARK-7984?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14566611#comment-14566611
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Apache Spark commented on SPARK-7984:
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User 'cloud-fan' has created a pull request for this issue:
https://github.com/apache/spark/pull/6505
> do type coercion for key and when expressions in CaseKeyWhen
> ------------------------------------------------------------
>
> Key: SPARK-7984
> URL: https://issues.apache.org/jira/browse/SPARK-7984
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Wenchen Fan
>
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