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From "Zheng Shao (JIRA)" <j...@apache.org>
Subject [jira] Created: (HIVE-308) UNION ALL should create different destination directories for different operands
Date Thu, 26 Feb 2009 06:25:01 GMT
UNION ALL should create different destination directories for different operands
--------------------------------------------------------------------------------

                 Key: HIVE-308
                 URL: https://issues.apache.org/jira/browse/HIVE-308
             Project: Hadoop Hive
          Issue Type: Bug
          Components: Query Processor
    Affects Versions: 0.2.0, 0.3.0
            Reporter: Zheng Shao


The following query hangs:
{code} 
select * from (select 1 from zshao_lazy union all select 2 from zshao_lazy) a;
{code} 

The following query produce wrong results: (one map-reduce job overwrite/cannot overwrite
the result of the other)
{code} 
select * from (select 1 as id from zshao_lazy cluster by id union all select 2 as id from
zshao_meta) a;
{code} 

The reason of both is that the destination directory of the file sink operator conflicts with
each other.


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