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https://issues.apache.org/jira/browse/CALCITE-1681?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15901874#comment-15901874
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Remus Rusanu commented on CALCITE-1681:
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https://github.com/apache/calcite/pull/392
This is not ready, but I pushed out early so I get feedback before I go to deep
down the wrong track...
> Provide a way to copy RelNode trees between clusters
> ----------------------------------------------------
>
> Key: CALCITE-1681
> URL: https://issues.apache.org/jira/browse/CALCITE-1681
> Project: Calcite
> Issue Type: Improvement
> Reporter: Remus Rusanu
> Assignee: Remus Rusanu
>
> In Hive we cache materialized view plans and reuse the cached plans in
> queries. For this we need a way to do deep clone copy of a RelNode tree from
> one RelOptCluster to another.
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