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From "Steven Wong (JIRA)" <>
Subject [jira] [Commented] (HIVE-581) improve group by syntax
Date Sat, 12 May 2012 07:28:01 GMT


Steven Wong commented on HIVE-581:

I actually agree with Namit's first instinct that adding a config sounds like a bad idea.
Having used MySQL a lot in the past, I never liked its syntax that allows column positions.
Using column aliases is so much clearer, less error-prone, and still very succinct.

> improve group by syntax
> -----------------------
>                 Key: HIVE-581
>                 URL:
>             Project: Hive
>          Issue Type: Improvement
>          Components: Clients, Query Processor
>            Reporter: Larry Ogrodnek
>            Assignee: Weizhe Shi
>              Labels: features
> It would be nice if group by allowed either column aliases or column position (like mysql).
> It can be burdensome to have to repeat UDFs both in the select and in the group by.
> e.g. instead of:
> select f1(col1), f2(col2), f3(col3), count(1) group by f1(col1), f2(col2), f3(col3);
> it would allow:
> select f1(col1), f2(col2), f3(col3), count(1) group by 1, 2, 3;

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