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https://issues.apache.org/jira/browse/CALCITE-2537?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16606117#comment-16606117
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Laurent Goujon commented on CALCITE-2537:
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Attaching pull request (since stopped being done automatically for me):
https://github.com/apache/calcite/pull/820
> Make sure assertions are enabled before calling VolcanoPlanner#validate
> -----------------------------------------------------------------------
>
> Key: CALCITE-2537
> URL: https://issues.apache.org/jira/browse/CALCITE-2537
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Reporter: Laurent Goujon
> Assignee: Laurent Goujon
> Priority: Minor
>
> {{VolcanoPlanner#validate()}} is invoked if the log level is debug or lower.
> But considering how enabling this method slows down the whole planning
> (changing it for running tests make the whole duration several hours), and
> this is some kind of assertion (since it throws {{AssertionError}}, I would
> suggest to only enable it when assertions are enabled
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