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From "Sergey Shelukhin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-7616) pre-size mapjoin hashtable based on statistics
Date Tue, 05 Aug 2014 21:31:13 GMT

    [ https://issues.apache.org/jira/browse/HIVE-7616?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14086802#comment-14086802
] 

Sergey Shelukhin commented on HIVE-7616:
----------------------------------------

it would be nice to have key count estimate in stats too, but I guess key could be different
for each query as far as Hive is concerned. Maybe we can add some notion of keys for typical
dimension tables and have stats for that.

> pre-size mapjoin hashtable based on statistics
> ----------------------------------------------
>
>                 Key: HIVE-7616
>                 URL: https://issues.apache.org/jira/browse/HIVE-7616
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Sergey Shelukhin
>            Assignee: Sergey Shelukhin
>         Attachments: HIVE-7616.patch
>
>




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