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https://issues.apache.org/jira/browse/HIVE-9581?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15305303#comment-15305303
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Andrew Sears commented on HIVE-9581:
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This is rather old, updated wiki as it was missing. Further detail could be
added describing behavior of Calcite optimization and its effect on UNION
statement, if any...
> CBO (Calcite Return Path): Translate Join to Hive Op [CBO branch]
> -----------------------------------------------------------------
>
> Key: HIVE-9581
> URL: https://issues.apache.org/jira/browse/HIVE-9581
> Project: Hive
> Issue Type: Sub-task
> Components: CBO
> Affects Versions: cbo-branch
> Reporter: Jesus Camacho Rodriguez
> Assignee: Jesus Camacho Rodriguez
> Labels: TODOC-CBO, TODOC1.2
> Fix For: cbo-branch
>
> Attachments: HIVE-9581.cbo.patch
>
>
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