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From "Jesus Camacho Rodriguez (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-21395) Refactor HiveSemiJoinRule
Date Tue, 26 Mar 2019 01:12:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-21395?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16801289#comment-16801289
] 

Jesus Camacho Rodriguez commented on HIVE-21395:
------------------------------------------------

+1 (pending tests)

> Refactor HiveSemiJoinRule
> -------------------------
>
>                 Key: HIVE-21395
>                 URL: https://issues.apache.org/jira/browse/HIVE-21395
>             Project: Hive
>          Issue Type: Improvement
>          Components: Query Planning
>    Affects Versions: 4.0.0
>            Reporter: Vineet Garg
>            Assignee: Vineet Garg
>            Priority: Major
>         Attachments: HIVE-21395.1.patch, HIVE-21395.2.patch
>
>
> Following refactoring needs to be done:
> * Update the rule matching pattern to avoid using HepVertex
> * HIVE-21338 adds logic to determine if rel plan will produce at most one row. Use this
in HiveSemiJoinRule



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