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From "Gang Tim Liu (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-3343) Hive: Query misaligned result for Group by followed by Join with filter and skip a group-by result
Date Wed, 08 Aug 2012 00:03:09 GMT
Gang Tim Liu created HIVE-3343:
----------------------------------

             Summary: Hive: Query misaligned result for Group by followed by Join with filter
and skip a group-by result
                 Key: HIVE-3343
                 URL: https://issues.apache.org/jira/browse/HIVE-3343
             Project: Hive
          Issue Type: Bug
          Components: Query Processor
            Reporter: Gang Tim Liu
            Assignee: Gang Tim Liu


This simple Hive query would generate wrong result:

select a.key, b.k2, b.k3
from src a
join (
  select key, 
         min(key) as k,
         min(key)+1 as k1,
         min(key)+2 as k2,
         min(key)+3 as k3
  from src
  group by key
) b
on a.key=b.key and b.k1 < 5;


0       3.0     1.0
0       3.0     1.0
0       3.0     1.0
2       5.0     3.0

The right result is:
0	2.0	3.0
0	2.0	3.0
0	2.0	3.0
2	4.0	5.0

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