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https://issues.apache.org/jira/browse/TAJO-1539?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Keuntae Park reassigned TAJO-1539:
----------------------------------
Assignee: Keuntae Park
> 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
> Assignee: 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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