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https://issues.apache.org/jira/browse/DRILL-6992?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16812899#comment-16812899
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Aman Sinha commented on DRILL-6992:
-----------------------------------
Histogram creation and usage for the following data types is supported as of
commit # 849f896: INT, BIGINT, FLOAT, DOUBLE, TIME, DATE, TIMESTAMP, BOOLEAN.
Marking this umbrella JIRA as fixed. For other data types, in particular
VARCHAR, VARBINARY, I will open enhancement JIRA separately for a future
release.
> 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
> Fix For: 1.16.0
>
>
> 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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