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https://issues.apache.org/jira/browse/BEAM-9825?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17099834#comment-17099834
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Darshan Jani commented on BEAM-9825:
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[~amaliujia] I have created PR [1]. Can you please help me review it?
Should we remove [2] class, it is unused, but is public.
[1]:https://github.com/apache/beam/pull/11610
[2]:https://github.com/apache/beam/blob/master/sdks/java/extensions/sql/src/main/java/org/apache/beam/sdk/extensions/sql/impl/transform/BeamSetOperatorsTransforms.java
> Transforms for Intersect, IntersectAll, Except, ExceptAll, Union, UnionAll
> --------------------------------------------------------------------------
>
> Key: BEAM-9825
> URL: https://issues.apache.org/jira/browse/BEAM-9825
> Project: Beam
> Issue Type: New Feature
> Components: sdk-java-core
> Reporter: Darshan Jani
> Assignee: Darshan Jani
> Priority: Major
> Original Estimate: 96h
> Time Spent: 40m
> Remaining Estimate: 95h 20m
>
> I'd like to propose following new high-level transforms.
> * Intersect
> Compute the intersection between elements of two PCollection.
> Given _leftCollection_ and _rightCollection_, this transform returns a
> collection containing elements that common to both _leftCollection_ and
> _rightCollection_
>
> * Except
> Compute the difference between elements of two PCollection.
> Given _leftCollection_ and _rightCollection_, this transform returns a
> collection containing elements that are in _leftCollection_ but not in
> _rightCollection_
> * Union
> Find the elements that are either of two PCollection.
> Implement IntersetAll, ExceptAll and UnionAll variants of transforms.
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