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https://issues.apache.org/jira/browse/CALCITE-6249?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17815135#comment-17815135
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Ulrich Kramer commented on CALCITE-6249:
----------------------------------------
See also [this
commit|https://github.com/sap-contributions/calcite/commit/4b05e056a60c95f55bea51b4fc6ed82ee0f8b228]
> RelNode::estimatedRowCount should not be used in computeSelfCost
> ----------------------------------------------------------------
>
> Key: CALCITE-6249
> URL: https://issues.apache.org/jira/browse/CALCITE-6249
> Project: Calcite
> Issue Type: Bug
> Reporter: Ulrich Kramer
> Priority: Minor
>
> {{RelNode::estimatedRowCount}} is still used in many place inside
> {{computeSelfCost}}
> If it should be possible to implement the estimation of the row count
> completely outside Calcite, these calls should be replaced by
> {{mq.getRowCount(rel)}}.
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