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https://issues.apache.org/jira/browse/CALCITE-4650?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17362916#comment-17362916
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Stamatis Zampetakis commented on CALCITE-4650:
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Hey [~vozerov], small info just so you are aware; at the moment, we don't use
the 'next' tag for the fixVersion but the actual version directly (in this case
it should be 1.28.0). If nobody is working on this then by convention we
usually leave the fixVersion empty.
> 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: next
>
> 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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