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From "Deepak Jaiswal (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-16423) De-duplicate semijoin branches and add hint to enforce semi join optimization
Date Wed, 12 Apr 2017 03:24:41 GMT

     [ https://issues.apache.org/jira/browse/HIVE-16423?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Deepak Jaiswal updated HIVE-16423:
----------------------------------
    Attachment: HIVE-16423.1.patch

Initial patch.

> De-duplicate semijoin branches and add hint to enforce semi join optimization
> -----------------------------------------------------------------------------
>
>                 Key: HIVE-16423
>                 URL: https://issues.apache.org/jira/browse/HIVE-16423
>             Project: Hive
>          Issue Type: Task
>            Reporter: Deepak Jaiswal
>            Assignee: Deepak Jaiswal
>         Attachments: HIVE-16423.1.patch
>
>
> Currently in an n-way join, a semi join branch is created n times. Instead, it should
reuse the  same branch.
> Add hints in semijoin to enforce particular semi join optimization.



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