[jira] [Created] (CALCITE-3837) AntiJoin with empty right input can always be transformed as its left input

["Ruben Q L (Jira)" <ji...@apache.org>]

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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