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https://issues.apache.org/jira/browse/CALCITE-7490?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yu Xu resolved CALCITE-7490.
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Resolution: Fixed
Fixed in
[e00c693|https://github.com/apache/calcite/commit/e00c69300e9944d95ac321e84a5bd529a8a99ad6]
Thank you for the review [~mbudiu]
> PruneEmptyRules is ineffective for window statements
> ----------------------------------------------------
>
> Key: CALCITE-7490
> URL: https://issues.apache.org/jira/browse/CALCITE-7490
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.41.0
> Reporter: Yu Xu
> Assignee: Yu Xu
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.42.0
>
>
> PruneEmptyRules is ineffective for window statements.
> SQL：
> {code:java}
> select count(*) over () from emp where false {code}
> Current optimization is:
> {code:java}
> LogicalProject(EXPR$0=[$9])
> LogicalWindow(window#0=[window(aggs [COUNT()])])
> LogicalValues(tuples=[[]]) {code}
> The target execution plan should better to be:
> {code:java}
> LogicalValues(tuples=[[]]) {code}
> We maybe need to add support for Windows scenarios.
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