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https://issues.apache.org/jira/browse/CALCITE-3586?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16992691#comment-16992691
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Stamatis Zampetakis commented on CALCITE-3586:
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I would suggest to always use the cluster of the \{{RelBuilder}} when creating
the new expressions. Like this we could also partially support CALCITE-1681 for
copying plans between clusters.
> ToLogicalConverter should not create plans with nodes in different clusters
> ----------------------------------------------------------------------------
>
> Key: CALCITE-3586
> URL: https://issues.apache.org/jira/browse/CALCITE-3586
> Project: Calcite
> Issue Type: Bug
> Affects Versions: 1.21.0
> Reporter: Stamatis Zampetakis
> Assignee: Stamatis Zampetakis
> Priority: Minor
>
> Currently the {{ToLogicalConverter}} sometimes obtains the cluster from
> another RelNode directly and sometimes it uses the cluster that is present in
> the {{RelBuilder}}. Depending on how it is used, these clusters are not
> necessarily the same leading to plans which may have nodes in different
> clusters which in most cases is undesirable.
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