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From "Gunther Hagleitner (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-20490) UDAF: Add an `approx_distinct` to Hive
Date Thu, 18 Oct 2018 02:50:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-20490?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16654555#comment-16654555
] 

Gunther Hagleitner commented on HIVE-20490:
-------------------------------------------

+1

> UDAF: Add an `approx_distinct` to Hive
> --------------------------------------
>
>                 Key: HIVE-20490
>                 URL: https://issues.apache.org/jira/browse/HIVE-20490
>             Project: Hive
>          Issue Type: Improvement
>          Components: UDF
>    Affects Versions: 4.0.0
>            Reporter: Gopal V
>            Assignee: Gopal V
>            Priority: Major
>         Attachments: HIVE-20490.1.patch, HIVE-20490.2.patch
>
>
> This gives a direct pathway to call the equivalent of Hive's default compute_stats()
UDAF which computes a HyperLogLog bitVector + approx distinct on a column.



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