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From "Laljo John Pullokkaran (JIRA)" <>
Subject [jira] [Commented] (HIVE-10141) count(distinct) not supported in Windowing function
Date Mon, 21 Dec 2015 23:33:46 GMT


Laljo John Pullokkaran commented on HIVE-10141:

Its not just parser; the compiler currently doesn't support distinct in UDAFS with windowing.

I think this is most likely just a compiler side change (may be to add distinct cols to partition
Not sure if chained PTF would need any special handling.

> count(distinct) not supported in Windowing function
> ---------------------------------------------------
>                 Key: HIVE-10141
>                 URL:
>             Project: Hive
>          Issue Type: Improvement
>          Components: PTF-Windowing
>    Affects Versions: 1.0.0
>            Reporter: Yi Zhang
>            Priority: Critical
> Count(distinct) is a very important function for analysis. For example, unique visitors
instead of total visitors. Currently it is missing in Windowing function.

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