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https://issues.apache.org/jira/browse/FLINK-8277?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Flink Jira Bot updated FLINK-8277:
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    Labels: auto-unassigned  (was: stale-assigned)

> Optimize code generation by using local references
> --------------------------------------------------
>
>                 Key: FLINK-8277
>                 URL: https://issues.apache.org/jira/browse/FLINK-8277
>             Project: Flink
>          Issue Type: Improvement
>          Components: Table SQL / API
>            Reporter: Timo Walther
>            Assignee: Ruidong Li
>            Priority: Major
>              Labels: auto-unassigned
>
> By default, Flink uses {{org.apache.calcite.rex.RexProgram#expandLocalRef}} 
> to remove local references which reverses the effect of common subexpression 
> elimination. For a more performant execution and smaller generated code we 
> should leverage common subexpressions.



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