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From "Chao Sun (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-15489) Alternatively use table scan stats for HoS
Date Thu, 22 Dec 2016 18:08:58 GMT

     [ https://issues.apache.org/jira/browse/HIVE-15489?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Chao Sun updated HIVE-15489:
----------------------------
    Attachment:     (was: HIVE-15489.wip.patch)

> Alternatively use table scan stats for HoS
> ------------------------------------------
>
>                 Key: HIVE-15489
>                 URL: https://issues.apache.org/jira/browse/HIVE-15489
>             Project: Hive
>          Issue Type: Improvement
>          Components: Spark, Statistics
>    Affects Versions: 2.2.0
>            Reporter: Chao Sun
>            Assignee: Chao Sun
>         Attachments: HIVE-15489.wip.patch
>
>
> For MapJoin in HoS, we should provide an option to only use stats in the TS rather than
the populated stats in each of the join branch. This could be pretty conservative but more
reliable.



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