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Posted to dev@hive.apache.org by "Prasanth J (JIRA)" <ji...@apache.org> on 2013/10/01 04:03:24 UTC
[jira] [Commented] (HIVE-5325) Implement statistics providing ORC
writer and reader interfaces
[ https://issues.apache.org/jira/browse/HIVE-5325?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13782558#comment-13782558 ]
Prasanth J commented on HIVE-5325:
----------------------------------
[~ashutoshc] which among the two patch will HiveQA pick? I have java-only patch and protobuf generated code patch.
> 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-5325.2.patch.txt, HIVE-5325.3.patch.txt, HIVE-5325-java-only.1.patch.txt, HIVE-5325-java-only.2.patch.txt, HIVE-5325-java-only.3.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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