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https://issues.apache.org/jira/browse/TRAFODION-2047?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15323913#comment-15323913
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liu ming commented on TRAFODION-2047:
-------------------------------------
Most of INTERSECT code is already in Trafodion, but not enabled.
The current logic is to transform the INTERSECT into JOIN and remove the output
from left table, which I believe is same as SEMI JOIN.
So I propose to change the JOIN into SEMI_JOIN and enable the support of
INTERSECT.
I think all changes are in Binder.
> add SQL syntax support to INTERSECT
> -----------------------------------
>
> Key: TRAFODION-2047
> URL: https://issues.apache.org/jira/browse/TRAFODION-2047
> Project: Apache Trafodion
> Issue Type: New Feature
> Reporter: liu ming
> Assignee: liu ming
>
> INTERSECT is a common SQL syntax.
> Trafodion should support it.
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