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https://issues.apache.org/jira/browse/SPARK-2052?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14019578#comment-14019578
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Takuya Ueshin commented on SPARK-2052:
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PRed: https://github.com/apache/spark/pull/990
> Add optimization for CaseConversionExpression's.
> ------------------------------------------------
>
> Key: SPARK-2052
> URL: https://issues.apache.org/jira/browse/SPARK-2052
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Takuya Ueshin
>
> Add optimization for {{CaseConversionExpression}}'s.
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