[ 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! -- This message was sent by Atlassian Jira (v8.3.4#803005)