Donghe Kang created ARROW-17520:
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Summary: SubStrait SetRel (UnionAll)
Key: ARROW-17520
URL: https://issues.apache.org/jira/browse/ARROW-17520
Project: Apache Arrow
Issue Type: New Feature
Reporter: Donghe Kang
The SetRel operator in Substrait is a critical operator to merge data from
several branches in the query plan. The operator has a few options like MINUS,
INTERSECTION and UNION. The UNION operation is the foundation of other options
and easier to implement. As I know, Acero already has the union operator and we
could easily map the UNIONALL in Substrait to the Union operator in Acero.
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