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https://issues.apache.org/jira/browse/CALCITE-2817?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vladimir Sitnikov updated CALCITE-2817:
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Attachment: running_rule.png
> Make CannotPlanException great
> ------------------------------
>
> Key: CALCITE-2817
> URL: https://issues.apache.org/jira/browse/CALCITE-2817
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.18.0
> Reporter: Vladimir Sitnikov
> Assignee: Julian Hyde
> Priority: Major
> Attachments: converters.png, running_rule.png, subsets.png
>
>
> 1) Empty subsets are the typical offenders for CannotPlan, so identify them
> and print before printing the planner dump
> 2) Print Graphviz-compatible output as well so the output is easier to
> understand
> It would probably make sense to expose leafmost empty subsets via
> {{Set<RelSubset> CannotPlanExeption#getDeadSubsets()}}
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