[jira] Created: (HIVE-1398) Support union all without an outer select *

[Ashish Thusoo (JIRA)]

Support union all without an outer select *
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                 Key: HIVE-1398
                 URL: https://issues.apache.org/jira/browse/HIVE-1398
             Project: Hadoop Hive
          Issue Type: Improvement
          Components: Query Processor
            Reporter: Ashish Thusoo
            Assignee: Ashish Thusoo


In hive for union alls the query has to be wrapped in an sub query as shown 
below:

select * from 
(select c1 from t1
  union all
  select c2 from t2);

This JIRA proposes to fix that to support

select c1 from t1
union all
select c2 from t2;


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