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  1. Calcite
  2. CALCITE-3756

RelSubset should not match operand(RelNode.class)

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      Even RelSubset is a subclass of RelNode, but they are quite different. RelNode already fires these rules, it is not necessary to fire for RelSubset. More importantly, it never worked due to CALCITE-3755.
      In addition, it will waste time to try to iterate class operands of RelSubset and try to match pattern operand(RelNode), given that it never matches when ascending.

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            Unassigned Unassigned
            hyuan Haisheng Yuan
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