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https://issues.apache.org/jira/browse/HIVE-2185?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tomasz Nykiel updated HIVE-2185:
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Attachment: HIVE-2185.patch
> extend table statistics to store the size of uncompressed data (+extend
> interfaces for collecting other types of statistics)
> ----------------------------------------------------------------------------------------------------------------------------
>
> Key: HIVE-2185
> URL: https://issues.apache.org/jira/browse/HIVE-2185
> Project: Hive
> Issue Type: New Feature
> Components: Serializers/Deserializers, Statistics
> Reporter: Tomasz Nykiel
> Assignee: Tomasz Nykiel
> Attachments: HIVE-2185.patch
>
>
> Currently, when executing INSERT OVERWRITE and ANALYZE TABLE commands we
> collect statistics about the number of rows per partition/table. Other
> statistics (e.g., total table/partition size) are derived from the file
> system.
> Here, we want to collect information about the sizes of uncompressed data, to
> be able to determine the efficiency of compression.
> Currently, a large part of statistics collection mechanism is hardcoded and
> not-easily extensible for other statistics.
> On top of adding the new statistic collected, it would be desirable to extend
> the collection mechanism, so any new statistics could be added easily.
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