[jira] [Created] (CALCITE-7280) Introduce RelNode.copy, which can copy the variable set

[Dmitry Sysolyatin (Jira)]

Dmitry Sysolyatin created CALCITE-7280:
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             Summary: Introduce RelNode.copy, which can copy the variable set
                 Key: CALCITE-7280
                 URL: https://issues.apache.org/jira/browse/CALCITE-7280
             Project: Calcite
          Issue Type: Improvement
          Components: core
    Affects Versions: 1.41.0
            Reporter: Dmitry Sysolyatin
            Assignee: Dmitry Sysolyatin


Right now, the `RelNode` interface knows about variablesSet through 
getVariablesSet, but there isn’t a copy that can replace this variablesSet.

Proposal to introduce:
{code}
RelNode copy(
      RelTraitSet traitSet,
      List<RelNode> inputs,
      Set<CorrelationId> variablesSet
  );
{code}

It is a prerequisite for [CALCITE-5390].



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