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https://issues.apache.org/jira/browse/SPARK-2036?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14018928#comment-14018928
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Takuya Ueshin commented on SPARK-2036:
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PRed: https://github.com/apache/spark/pull/982
> CaseConversionExpression should check if the evaluated value is null.
> ---------------------------------------------------------------------
>
> Key: SPARK-2036
> URL: https://issues.apache.org/jira/browse/SPARK-2036
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Reporter: Takuya Ueshin
>
> {{CaseConversionExpression}} should check if the evaluated value is {{null}}.
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