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https://issues.apache.org/jira/browse/HIVE-6578?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14088968#comment-14088968
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Lefty Leverenz commented on HIVE-6578:
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This adds configuration parameter *hive.stats.gather.num.threads* which is
documented in the wiki here:
* [Configuration Properties -- hive.stats.gather.num.threads |
https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties#ConfigurationProperties-hive.stats.gather.num.threads]
> Use ORC file footer statistics through StatsProvidingRecordReader interface
> for analyze command
> -----------------------------------------------------------------------------------------------
>
> Key: HIVE-6578
> URL: https://issues.apache.org/jira/browse/HIVE-6578
> Project: Hive
> Issue Type: New Feature
> Affects Versions: 0.13.0
> Reporter: Prasanth J
> Assignee: Prasanth J
> Labels: TODOC13, orcfile
> Fix For: 0.13.0
>
> Attachments: HIVE-6578.1.patch, HIVE-6578.2.patch, HIVE-6578.3.patch,
> HIVE-6578.4.patch, HIVE-6578.4.patch.txt
>
>
> ORC provides file level statistics which can be used in analyze partialscan
> and noscan cases to compute basic statistics like number of rows, number of
> files, total file size and raw data size. On the writer side, a new interface
> was added earlier (StatsProvidingRecordWriter) that exposed stats when
> writing a table. Similarly, a new interface StatsProvidingRecordReader can be
> added which when implemented should provide stats that are gathered by the
> underlying file format.
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