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https://issues.apache.org/jira/browse/CALCITE-2729?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16803581#comment-16803581
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Haisheng Yuan commented on CALCITE-2729:
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Pushed to master. Thanks, [~Chunwei Lei]!
> Introducing WindowReduceExpressionRule
> --------------------------------------
>
> Key: CALCITE-2729
> URL: https://issues.apache.org/jira/browse/CALCITE-2729
> Project: Calcite
> Issue Type: Bug
> Reporter: Chunwei Lei
> Assignee: Chunwei Lei
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.20.0
>
> Time Spent: 2h
> Remaining Estimate: 0h
>
> Introducing WindowExpressionRules, for example:
> select sum(sal) over (partition by deptno order by sal) from src where
> sal=5000
> can be reduced to
> select sum(5000) over (partition by deptno) from src where sal=5000
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