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https://issues.apache.org/jira/browse/HIVE-22939?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zoltan Haindrich reassigned HIVE-22939:
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Assignee: (was: Zoltan Haindrich)
> Datasketches support
> --------------------
>
> Key: HIVE-22939
> URL: https://issues.apache.org/jira/browse/HIVE-22939
> Project: Hive
> Issue Type: Improvement
> Reporter: Zoltan Haindrich
> Priority: Major
>
> We could probably integrate with the Datasketches more closely; it has very
> usefull alogrithms which could utilized various ways:
> * provide an optional way to transparently rewrite count(distinct) to use
> some distinct counting sketch
> * fequent items could be gathered during statistics collection; knowing the
> most frequent elements could extremely helpfull in giving more accurate
> estimates for our plans
> * and...it also has a way to estimate a CDF function; which might be usefull
> in giving better estimates for range queries
> https://datasketches.apache.org/
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