Ruben Q L created CALCITE-3837:
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Summary: AntiJoin with empty right input can always be transformed
as its left input
Key: CALCITE-3837
URL: https://issues.apache.org/jira/browse/CALCITE-3837
Project: Calcite
Issue Type: Improvement
Components: core
Affects Versions: 1.22.0
Reporter: Ruben Q L
Assignee: Ruben Q L
CALCITE-3783 fixed {{PruneEmptyRules#JOIN_RIGHT_INSTANCE}} for join type ANTI:
{code}
Join(Scan(Emp), Empty, ANTI) becomes Scan(Emp)
{code}
However, it performs this transformation only in case of anti equi-join (in
case of non-equi, no transformation is made).
Re-considering this, I believe this is a mistake, and the transformation can
always be performed, independently of the join condition (equi / non-equi, it
does not matter).
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