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From "Shengsheng Huang (JIRA)" <>
Subject [jira] [Created] (HIVE-3199) support select distinct *
Date Tue, 26 Jun 2012 04:15:42 GMT
Shengsheng Huang created HIVE-3199:

             Summary: support select distinct *
                 Key: HIVE-3199
             Project: Hive
          Issue Type: New Feature
          Components: Query Processor
    Affects Versions: 0.9.0
            Reporter: Shengsheng Huang

Error is reported when running query "select distinct * from t". 
It is a common feature that is better to be supported.

Did some investigation about this issue. In current implementation "select distinct a,b,c
from t" is translated to "select a,b,c from t group by a,b,c". So select distinct * is translated
literally to "select * from group by *". But * is not handled properly when processing groupby

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