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https://issues.apache.org/jira/browse/HIVE-30015?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated HIVE-30015:
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Labels: pull-request-available (was: )
> Multiple identical Projects on top of HiveJdbcConverter
> -------------------------------------------------------
>
> Key: HIVE-30015
> URL: https://issues.apache.org/jira/browse/HIVE-30015
> Project: Hive
> Issue Type: Improvement
> Components: Hive
> Affects Versions: 4.3.0
> Reporter: Soumyakanti Das
> Assignee: Soumyakanti Das
> Priority: Minor
> Labels: pull-request-available
> Attachments: cbo_jdbc_duplicate_project_repro.q,
> cbo_jdbc_duplicate_project_repro.q.out
>
>
> I have added a repro query, similar to cbo_query14.q, and its output. We see
> multiple identical Projects on top of HiveJdbcConverter, for example:
> {noformat}
> HiveUnion(all=[true])
> HiveProject(id=[$0], $f1=[$1])
> HiveProject(id=[$0], $f1=[$1])
> HiveProject(id=[$0], $f1=[$1])
> HiveProject(id=[$0], $f1=[$1])
> HiveJdbcConverter(convention=[JDBC.POSTGRES]){noformat}
> I think this can be resolved by adding a check in
> {{PlanModifierForASTConv.convertOpTree(RelNode rel, RelNode parent)}}
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