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Andrew Sears commented on HIVE-9581: ------------------------------------ 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 > > -- This message was sent by Atlassian JIRA (v6.3.4#6332)