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Posted to issues@hive.apache.org by "Vineet Garg (JIRA)" <ji...@apache.org> on 2019/03/25 21:45:00 UTC

[jira] [Updated] (HIVE-21395) Refactor HiveSemiJoinRule

     [ https://issues.apache.org/jira/browse/HIVE-21395?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Vineet Garg updated HIVE-21395:
-------------------------------
    Status: Patch Available  (was: Open)

> 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
>
>
> 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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