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From "Mafish (JIRA)" <j...@apache.org>
Subject [jira] Created: (HIVE-1202) "Unknown exception : null" while join
Date Fri, 26 Feb 2010 07:46:27 GMT
"Unknown exception : null" while join

                 Key: HIVE-1202
                 URL: https://issues.apache.org/jira/browse/HIVE-1202
             Project: Hadoop Hive
          Issue Type: Bug
          Components: Query Processor
    Affects Versions: 0.4.1
         Environment: hive-0.4.1
hadoop 0.19.1
            Reporter: Mafish
             Fix For: 0.4.1

Hive throws "Unknown exception : null" with query:

select * from 
  select name from classes 
) a
  join classes b
where a.name > b.number

After tracing the code, I found this bug will occur with following
1. It is join operation.
2. At least one of the source of join is physical table (right side in
above case).
3. With where condition and condition(s) of where clause must include
columns from both side of join (a.name and b.number in case)

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