[jira] [Updated] (SPARK-40050) Eliminate the Sort if there is a LocalLimit between Join and Sort

["Yuming Wang (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-40050?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Yuming Wang updated SPARK-40050:
--------------------------------
    Summary: Eliminate the Sort if there is a LocalLimit between Join and Sort  (was: Eliminate sort if parent is local limit)

> Eliminate the Sort if there is a LocalLimit between Join and Sort
> -----------------------------------------------------------------
>
>                 Key: SPARK-40050
>                 URL: https://issues.apache.org/jira/browse/SPARK-40050
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 3.4.0
>            Reporter: Yuming Wang
>            Priority: Major
>
> It seems we can remove Sort operator:
> {code:scala}
>     val projectPlan = testRelation.select($"a", $"b")
>     val unnecessaryOrderByPlan = projectPlan.orderBy($"a".asc)
>     val localLimitPlan = LocalLimit(Literal(2), unnecessaryOrderByPlan)
>     val projectPlanB = testRelationB.select($"d")
>     val joinPlan = localLimitPlan.join(projectPlanB, RightOuter).select($"a", $"d")
> {code}



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