sanjiv singh created HIVE-10782:
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             Summary: Support EXCEPT set operation
                 Key: HIVE-10782
                 URL: https://issues.apache.org/jira/browse/HIVE-10782
             Project: Hive
          Issue Type: Improvement
          Components: SQL
            Reporter: sanjiv singh


Support a EXCEPT operation  as <qb1> EXCEPT <qb2> .


Common requirement of queries to project two sets where you want result set 
which contains distinct rows from the left input query that aren’t output by 
the right input query.


The following sample statement combines the results with the INTERSECT 
operator, which returns distinct rows from the left input query that aren’t 
output by the right input query:


SELECT * FROM tableA
EXCEPT
SELECT * FROM tableB;

current exception:
FAILED: ParseException line *:** missing EOF at 'SELECT' near 'EXCEPT'



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