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https://issues.apache.org/jira/browse/CALCITE-4577?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jiatao Tao updated CALCITE-4577:
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Attachment: image-2021-04-11-16-53-35-466.png
> RelDigestWriter#done has performance when node's inputs is large
> ----------------------------------------------------------------
>
> Key: CALCITE-4577
> URL: https://issues.apache.org/jira/browse/CALCITE-4577
> Project: Calcite
> Issue Type: Bug
> Components: core
> Reporter: Jiatao Tao
> Assignee: Jiatao Tao
> Priority: Critical
> Attachments: image-2021-04-11-16-53-35-466.png
>
>
> Example like that: insert xxx VALUES (1, 'one'), (2, 'two'), (3,
> 'three')...(10000, 'ten thousand');
> It generate a Union node with 10000 inputs, and the performance is poor,
> here's the profile:
>
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