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https://issues.apache.org/jira/browse/HIVE-5325?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13772551#comment-13772551
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Prasanth J commented on HIVE-5325:
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The attached patch is generated on top of HIVE-5324.
Here is RB link https://reviews.apache.org/r/14243/
> Implement statistics providing ORC writer and reader interfaces
> ---------------------------------------------------------------
>
> Key: HIVE-5325
> URL: https://issues.apache.org/jira/browse/HIVE-5325
> 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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