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https://issues.apache.org/jira/browse/CALCITE-4650?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17363509#comment-17363509
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Vladimir Ozerov commented on CALCITE-4650:
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Hi [~zabetak], thanks for noting this. I fixed the version in this and a couple
of other tickets.
> 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
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.28.0
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> {{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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