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https://issues.apache.org/jira/browse/HIVE-20297?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Nishant Bangarwa reassigned HIVE-20297:
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> 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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