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https://issues.apache.org/jira/browse/FLINK-12906?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16867669#comment-16867669
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Dawid Wysakowicz commented on FLINK-12906:
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Hi [~hequn8128], actually I have done it
already(https://github.com/dawidwys/flink/commits/operationTreeBuilder). Would
you be ok if I took this over?
> Port OperationTreeBuilder to Java
> ---------------------------------
>
> Key: FLINK-12906
> URL: https://issues.apache.org/jira/browse/FLINK-12906
> Project: Flink
> Issue Type: Improvement
> Components: Table SQL / API
> Reporter: Hequn Cheng
> Assignee: Hequn Cheng
> Priority: Major
>
> As discussed with [~dawidwys], even we can't move it to the API module yet,
> but we could already migrate it to java. This might be a good idea, because
> some new features added there that use scala features, any such additions are
> making the future migration harder.
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