Keuntae Park created TAJO-1539:
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Summary: Implement EXCEPT ALL physical operator
Key: TAJO-1539
URL: https://issues.apache.org/jira/browse/TAJO-1539
Project: Tajo
Issue Type: Sub-task
Reporter: Keuntae Park
EXCEPT ALL implements bag(multiset) subtraction.
For example,
when query1 returns
{code}
1, 2, 3, 3, 3, 4
{code}
while query2 returns
{code}
2, 3, 5
{code}
Then query1 EXCEPT ALL query2 should return
{code}
1, 3, 3, 4
{code}
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