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https://issues.apache.org/jira/browse/HIVE-3602?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shreepadma Venugopalan updated HIVE-3602:
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Summary: Provide ability to roll up column stats from specific partitions
(was: Provide ability to roll up column stats from different partitions)
> Provide ability to roll up column stats from specific partitions
> ----------------------------------------------------------------
>
> Key: HIVE-3602
> URL: https://issues.apache.org/jira/browse/HIVE-3602
> Project: Hive
> Issue Type: Bug
> Components: Statistics
> Affects Versions: 0.10.0
> Reporter: Shreepadma Venugopalan
> Assignee: Shreepadma Venugopalan
>
> When executing query on a partitioned table it becomes necessary to combine
> the statistics from different partitions to know about the combined data
> distribution. For eg., consider a table with 5 partitions P0 to P4 and a
> query that scans partitions p0, p2 and p4. It becomes necessary to combine
> the statistics from the individual partitions to obtain the statistical
> properties of the combined data from the partitions. This JIRA covers the
> task of a) implementing logic to roll up statistics from specific partitions
> and b) providing an API to retrieve the combined statistics
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