darshanj opened a new pull request #11610: URL: https://github.com/apache/beam/pull/11610
Motivation:
1. Give high level general purpose set relational algebra transforms.
2. Utiltize them from BeamSQL code. (A Seperate PR will be created for that)
Implement new high-level transforms.
This PR Contains changes for Point-1:
Intersect
Compute the intersection between elements of two PCollection.
Given leftCollection and rightCollection, this transform returns a
collection containing distinct 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 distinct 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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