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https://issues.apache.org/jira/browse/CALCITE-4874?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17440156#comment-17440156
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xzh_dz commented on CALCITE-4874:
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It is convenient to call the 'explain' method directly.
org.apache.calcite.rel.RelNode#explain()
> Add recursive digest helper method
> ----------------------------------
>
> Key: CALCITE-4874
> URL: https://issues.apache.org/jira/browse/CALCITE-4874
> Project: Calcite
> Issue Type: Improvement
> Reporter: Will Noble
> Priority: Minor
> Labels: pull-request-available
> Time Spent: 50m
> Remaining Estimate: 0h
>
> I often find myself having to visual compare long rel node trees while
> debugging. Having a helper method ready to generate the string will save time
> going through and manually copy-pasting and formatting each node.
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