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https://issues.apache.org/jira/browse/HIVE-11252?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jesus Camacho Rodriguez updated HIVE-11252:
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    Description: When the return path is on, we might end up with a Project 
with DUMMY column in the plan; thus, we need to run the ProjectMergeRule after 
the column trimmer runs for the second time. To reproduce it, we can run 
interval_udf.q with the return path on.  (was: When the return path is on, we 
might end up with a Project with DUMMY column in the plan; thus, we need to run 
the ProjectMergeRule after the column trimmer runs for the second time.)

> CBO (Calcite Return Path): DUMMY project in plan
> ------------------------------------------------
>
>                 Key: HIVE-11252
>                 URL: https://issues.apache.org/jira/browse/HIVE-11252
>             Project: Hive
>          Issue Type: Sub-task
>          Components: CBO
>            Reporter: Jesus Camacho Rodriguez
>            Assignee: Jesus Camacho Rodriguez
>
> When the return path is on, we might end up with a Project with DUMMY column 
> in the plan; thus, we need to run the ProjectMergeRule after the column 
> trimmer runs for the second time. To reproduce it, we can run interval_udf.q 
> with the return path on.



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