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From "Yann Byron (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-12833) GROUPING__ID is wrong
Date Fri, 01 Sep 2017 06:24:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-12833?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16150107#comment-16150107
] 

Yann Byron commented on HIVE-12833:
-----------------------------------

[~davies]
We met this issue;
Could you please post the Hive code, where {{grouping__id}} is generated ?
We are not very clear for the logic for generating {{grouping__id}}.

Also could you please post the example you mentioned?

> GROUPING__ID is wrong
> ---------------------
>
>                 Key: HIVE-12833
>                 URL: https://issues.apache.org/jira/browse/HIVE-12833
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Davies Liu
>
> https://cwiki.apache.org/confluence/display/Hive/Enhanced+Aggregation,+Cube,+Grouping+and+Rollup
> Grouping__ID function
> This function returns a bitvector corresponding to whether each column is present or
not. For each column, a value of "1" is produced for a row in
> the result set if that column has been aggregated in that row, otherwise the value is
"0". This can be used to differentiate when there are nulls
> in the data.
> This does not match the example blow, in the first row, both key and value are aggregated,
so GROUPING__ID should be 3 not, 0.



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