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https://issues.apache.org/jira/browse/ARROW-17520?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Donghe Kang updated ARROW-17520:
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Description: 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 UNIONALL option that directly
merges data flows is the foundation of other options and is 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. (was: 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.)
> 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
> Priority: Major
>
> 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 UNIONALL option that directly merges data
> flows is the foundation of other options and is 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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