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From "Ashutosh Chauhan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-11252) CBO (Calcite Return Path): DUMMY project in plan
Date Tue, 14 Jul 2015 18:09:04 GMT

    [ https://issues.apache.org/jira/browse/HIVE-11252?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14626792#comment-14626792
] 

Ashutosh Chauhan commented on HIVE-11252:
-----------------------------------------

+1

> 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
>         Attachments: HIVE-11252.patch
>
>
> 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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