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https://issues.apache.org/jira/browse/FLINK-2673?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15307086#comment-15307086
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ASF GitHub Bot commented on FLINK-2673:
---------------------------------------
Github user asfgit closed the pull request at:
https://github.com/apache/flink/pull/2017
> Scala API does not support Option type as key
> ---------------------------------------------
>
> Key: FLINK-2673
> URL: https://issues.apache.org/jira/browse/FLINK-2673
> Project: Flink
> Issue Type: Wish
> Components: Scala API
> Reporter: Till Rohrmann
> Assignee: Chiwan Park
> Priority: Minor
>
> The Scala API does not support the {{Option}} type as a key. It could be
> useful to allow grouping on a field with this type.
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