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https://issues.apache.org/jira/browse/TAJO-1517?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14484808#comment-14484808
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Keuntae Park commented on TAJO-1517:
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As mentioned in TAJO-1525,
I changed the direction from rewriting INTERSECT as INTERSECT ALL + distinct to
implement physical operator for both INTERSECT and INTERSECT ALL.
> Implement INTERSECT
> -------------------
>
> Key: TAJO-1517
> URL: https://issues.apache.org/jira/browse/TAJO-1517
> Project: Tajo
> Issue Type: Sub-task
> Reporter: Keuntae Park
> Assignee: Keuntae Park
>
> {code}
> query1 INTERSECT [ALL] query2
> {code}
> INTERSECT returns all rows that are both in the result of query1 and in the
> result of query2.
> Duplicate rows are eliminated unless INTERSECT ALL is used.
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