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From "Nishant Bangarwa (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (HIVE-20297) Column Level Stats for Druid Tables
Date Thu, 02 Aug 2018 13:26:00 GMT

     [ https://issues.apache.org/jira/browse/HIVE-20297?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Nishant Bangarwa reassigned HIVE-20297:
---------------------------------------


> Column Level Stats for Druid Tables
> -----------------------------------
>
>                 Key: HIVE-20297
>                 URL: https://issues.apache.org/jira/browse/HIVE-20297
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Nishant Bangarwa
>            Assignee: Nishant Bangarwa
>            Priority: Major
>
> This task is to have correct column level stats for druid in hive metastore. 
> - Stats like min/max/cardinality can be gathered using a Druid Segment Metadata Query.

> - Druid Query planning we need to ensure that the filters/Aggregations pushed inside
DruidQuery are accounted for.
> Having correct stats would also help optimizer ensure proper join orderings when doing
federated complex joins between hive/druid. 



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