[jira] [Created] (CALCITE-4650) TopDownRuleDriver.DeriveTrait.derive produces wrong AssertionError when registering new nodes

["Vladimir Ozerov (Jira)" <ji...@apache.org>]

Vladimir Ozerov created CALCITE-4650:
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             Summary: TopDownRuleDriver.DeriveTrait.derive produces wrong AssertionError when registering new nodes
                 Key: CALCITE-4650
                 URL: https://issues.apache.org/jira/browse/CALCITE-4650
             Project: Calcite
          Issue Type: Bug
          Components: core
    Affects Versions: 1.27.0
            Reporter: Vladimir Ozerov
            Assignee: Vladimir Ozerov
             Fix For: next


{{TopDownRuleDriver.DeriveTrait.derive}} asserts that a derived node belongs to the same {{RelSet}} as the original node. 

If the original node {{N1}} refers to set {{S1}}, the derived node {{N2}} might be registered in the set {{S2}}, if {{S1}} was merged to {{S2}} between the registration of {{N1}} and derivation of {{N2}}. 

Currently, we compare the original set of the original node {{N1}} with the canonical set of the derived node {{N2}}. This leads to false assertions.



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