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https://issues.apache.org/jira/browse/DRILL-6992?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16757549#comment-16757549
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Aman Sinha commented on DRILL-6992:
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Added a link to the histogram design doc.
> Support column histogram statistics
> -----------------------------------
>
> Key: DRILL-6992
> URL: https://issues.apache.org/jira/browse/DRILL-6992
> Project: Apache Drill
> Issue Type: New Feature
> Components: Query Planning & Optimization
> Affects Versions: 1.15.0
> Reporter: Aman Sinha
> Assignee: Aman Sinha
> Priority: Major
>
> As a follow-up to
> [DRILL-1328|https://issues.apache.org/jira/browse/DRILL-1328] which is adding
> NDV (num distinct values) support and creating the framework for statistics,
> we also need Histograms. These are needed for range predicates selectivity
> estimation as well as equality predicates when there is non-uniform
> distribution of data.
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