Ruben Q L created CALCITE-3783:
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Summary: Rule to remove Join on top of empty Values
Key: CALCITE-3783
URL: https://issues.apache.org/jira/browse/CALCITE-3783
Project: Calcite
Issue Type: Improvement
Components: core
Reporter: Ruben Q L
Assignee: Ruben Q L
There are some scenarios where a Join with a left/right child being an empty
values can be removed:
- [ LEFT | INNER | SEMI | ANTI ] JOIN(EmptyValues, X) => EmptyValues
- [ INNER | SEMI ] JOIN(X, EmptyValues) => EmptyValues
- ANTI (equi)JOIN(X, EmptyValues) => X
The goal is to create new rule(s) (inside a new class named e.g.
JoinRemoveRule) to match and cover these scenarios.
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