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https://issues.apache.org/jira/browse/CALCITE-2537?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16605093#comment-16605093
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Laurent Goujon commented on CALCITE-2537:
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I would also be happy transforming the assertions into logging messages, since
obviously nothing really breaks (it might just cause a suboptimal plan)
> 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: Julian Hyde
> 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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