[jira] [Assigned] (HIVE-15848) count or sum distinct incorrect when hive.optimize.reducededuplication set to true

["Zoltan Haindrich (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-15848?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Zoltan Haindrich reassigned HIVE-15848:
---------------------------------------

    Assignee: Zoltan Haindrich

> count or sum distinct incorrect when hive.optimize.reducededuplication set to true
> ----------------------------------------------------------------------------------
>
>                 Key: HIVE-15848
>                 URL: https://issues.apache.org/jira/browse/HIVE-15848
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 0.13.0
>            Reporter: Biao Wu
>            Assignee: Zoltan Haindrich
>            Priority: Critical
>
> Test Table:
> {code:sql}
> create table test(id int,key int,name int);
> {code}
> Data：
> ||id||key||name||
> |1	|1	|2
> |1	|2	|3
> |1	|3	|2
> |1	|4	|2
> |1	|5	|3
> Test SQL1:
> {code:sql}
> select id,count(Distinct key),count(Distinct name)
> from (select id,key,name from count_distinct_test group by id,key,name)m
> group by id;
> {code}
> result：
> |1|5|4
> expect:
> |1|5|2
> Test SQL2:
> {code:sql}
> select id,count(Distinct name),count(Distinct key)
> from (select id,key,name from count_distinct_test group by id,name,key)m
> group by id;
> {code}
> result:
> |1|2|5



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