Vladimir Sitnikov created CALCITE-3643:
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Summary: Prevent matching JoinCommuteRule when both inputs are the
same
Key: CALCITE-3643
URL: https://issues.apache.org/jira/browse/CALCITE-3643
Project: Calcite
Issue Type: Improvement
Components: core
Reporter: Vladimir Sitnikov
Assignee: Vladimir Sitnikov
The conditions like =($0, $1) and =($1, $1) are equivalent, however adding that
permutation increases search space and it gains nothing.
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