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Posted to issues@calcite.apache.org by "Jiatao Tao (Jira)" <ji...@apache.org> on 2021/04/11 09:42:00 UTC
[jira] [Updated] (CALCITE-4578) skip SetOp#replaceInput when inputs
are not changed
[ https://issues.apache.org/jira/browse/CALCITE-4578?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jiatao Tao updated CALCITE-4578:
--------------------------------
Description:
Example like that: insert xxx VALUES (1, 'one'), (2, 'two'), (3, 'three')...(10000, 'ten thousand');
It generates a Union node with 10000 inputs, and the performance is poor, here's the profile:
!image-2021-04-11-16-53-35-466.png|width=740,height=185!
!image-2021-04-11-16-53-58-757.png|width=735,height=109!
> skip SetOp#replaceInput when inputs are not changed
> ---------------------------------------------------
>
> Key: CALCITE-4578
> URL: https://issues.apache.org/jira/browse/CALCITE-4578
> Project: Calcite
> Issue Type: Bug
> Components: core
> Reporter: Jiatao Tao
> Assignee: Jiatao Tao
> Priority: Major
>
> Example like that: insert xxx VALUES (1, 'one'), (2, 'two'), (3, 'three')...(10000, 'ten thousand');
> It generates a Union node with 10000 inputs, and the performance is poor, here's the profile:
> !image-2021-04-11-16-53-35-466.png|width=740,height=185!
> !image-2021-04-11-16-53-58-757.png|width=735,height=109!
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