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https://issues.apache.org/jira/browse/SPARK-21116?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16051546#comment-16051546
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Sean Owen commented on SPARK-21116:
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There's no context, justification or detail here. I'd not open things like this.
> Support MapKeyContains function
> -------------------------------
>
> Key: SPARK-21116
> URL: https://issues.apache.org/jira/browse/SPARK-21116
> Project: Spark
> Issue Type: New Feature
> Components: SQL
> Affects Versions: 2.0.2, 2.1.1
> Reporter: darion yaphet
>
> Check the map contains the key . Returns true if the map contains the key.
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