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From "Chao Sun (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (HIVE-15489) Alternatively use table scan stats for HoS
Date Tue, 14 Feb 2017 06:10:42 GMT

    [ https://issues.apache.org/jira/browse/HIVE-15489?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15865137#comment-15865137
] 

Chao Sun edited comment on HIVE-15489 at 2/14/17 6:10 AM:
----------------------------------------------------------

Test failures seem unrelated. Attaching the same patch v6 to confirm.


was (Author: csun):
Test failures seem unrelated. Attaching the same patch v4 to confirm.

> 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-15489.1.patch, HIVE-15489.2.patch, HIVE-15489.3.patch, HIVE-15489.6.patch,
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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