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https://issues.apache.org/jira/browse/HIVE-581?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13273792#comment-13273792
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shrikanth shankar commented on HIVE-581:
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AFAIK other databases (Oracle, and I believe SQL server) support GROUP BY 1 to
mean group by constant. If you do change the meaning for 1, 2, 3, what about
select "abc", count (*) from .. group by "abc";?
A change like this is (potentially) a language inconsistency (since string
constants are treated differently from integer constants) and having a config
may not be a bad idea.
> improve group by syntax
> -----------------------
>
> Key: HIVE-581
> URL: https://issues.apache.org/jira/browse/HIVE-581
> 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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