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https://issues.apache.org/jira/browse/FLINK-23555?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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weibowen updated FLINK-23555:
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Attachment: 企业微信截图_ec5bf14d-2393-4c31-9c90-f0d2cbc5e827.png
> Improve common subexpression elimination by using local references
> ------------------------------------------------------------------
>
> Key: FLINK-23555
> URL: https://issues.apache.org/jira/browse/FLINK-23555
> Project: Flink
> Issue Type: Improvement
> Components: Table SQL / Planner
> Reporter: weibowen
> Priority: Major
> Fix For: 1.14.0
>
> Attachments: 企业微信截图_ec5bf14d-2393-4c31-9c90-f0d2cbc5e827.png
>
>
> When we write a sql like
> By default, Flink uses {{org.apache.calcite.rex.RexProgram#expandLocalRef}}
> to remove local references which reverses the effect of common subexpression
> elimination
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