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https://issues.apache.org/jira/browse/CALCITE-6632?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mihai Budiu resolved CALCITE-6632.
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Fix Version/s: 1.39.0
Resolution: Fixed
Fixed in
https://github.com/apache/calcite/commit/72963da2e76e7961bec5aa19aa9bdfdd99c33a05
Thank you for the contribution, [~jiajunbernoulli]
> Wrong optimization because window missing constants in digest
> -------------------------------------------------------------
>
> Key: CALCITE-6632
> URL: https://issues.apache.org/jira/browse/CALCITE-6632
> Project: Calcite
> Issue Type: Bug
> Components: core
> Environment: !image-2024-10-17-10-41-11-032.png|width=482,height=203!
> Reporter: Jiajun Xie
> Assignee: Jiajun Xie
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.39.0
>
> Attachments: image-2024-10-17-10-41-11-032.png
>
>
> Here is a simple case:
> {code:java}
> select sum(100) over (partition by deptno order by sal) as s -- window1
> from emp
> union all
> select sum(1000) over(partition by deptno order by sal) as s -- window2
> from emp {code}
> window1 is different from window2.
> But window digest missing constants, the window2 will be replaced by window1
> after optimized.
> {code:java}
> LogicalUnion(all=[true])
> LogicalProject($0=[$2])
> LogicalWindow(window#0=[window(partition {1} order by [0] aggs
> [SUM($2)])]) -- window1 digest
> LogicalProject(SAL=[$5], DEPTNO=[$7])
> LogicalTableScan(table=[[CATALOG, SALES, EMP]])
> LogicalProject($0=[$2])
> LogicalWindow(window#0=[window(partition {1} order by [0] aggs
> [SUM($2)])]) -- window1 digest
> LogicalProject(SAL=[$5], DEPTNO=[$7])
> LogicalTableScan(table=[[CATALOG, SALES, EMP]]) {code}
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