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From "Prasanth J (JIRA)" <>
Subject [jira] [Commented] (HIVE-5325) Implement statistics providing ORC writer and reader interfaces
Date Fri, 20 Sep 2013 01:26:51 GMT


Prasanth J commented on HIVE-5325:

The attached patch is generated on top of HIVE-5324. 

Here is RB link
> Implement statistics providing ORC writer and reader interfaces
> ---------------------------------------------------------------
>                 Key: HIVE-5325
>                 URL:
>             Project: Hive
>          Issue Type: New Feature
>    Affects Versions: 0.13.0
>            Reporter: Prasanth J
>            Assignee: Prasanth J
>              Labels: orcfile, statistics
>             Fix For: 0.13.0
>         Attachments: HIVE-5325.1.patch.txt, HIVE-5325-java-only.1.patch.txt
> HIVE-5324 adds new interfaces that can be implemented by ORC reader/writer to provide
statistics. Writer provided statistics is used to update table/partition level statistics
in metastore. Reader provided statistics can be used for reducer estimation, CBO etc. in the
absence of metastore statistics.

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