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Posted to issues@drill.apache.org by "Pritesh Maker (JIRA)" <ji...@apache.org> on 2019/02/11 22:35:00 UTC

[jira] [Updated] (DRILL-6992) Support column histogram statistics

     [ https://issues.apache.org/jira/browse/DRILL-6992?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Pritesh Maker updated DRILL-6992:
---------------------------------
    Fix Version/s: 1.16.0

> 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 &amp; 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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