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https://issues.apache.org/jira/browse/SPARK-45755?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Yuming Wang updated SPARK-45755:
--------------------------------
Description:
Push down LocalLimit can not optimize the case of distinct.
{code:scala}
def isEmpty: Boolean = withAction("isEmpty",
withTypedPlan { LocalLimit(Literal(1), select().logicalPlan)
}.queryExecution) { plan =>
plan.executeTake(1).isEmpty
}
{code}
> Push down limit through Dataset.isEmpty()
> -----------------------------------------
>
> Key: SPARK-45755
> URL: https://issues.apache.org/jira/browse/SPARK-45755
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 4.0.0
> Reporter: Yuming Wang
> Priority: Major
>
> Push down LocalLimit can not optimize the case of distinct.
> {code:scala}
> def isEmpty: Boolean = withAction("isEmpty",
> withTypedPlan { LocalLimit(Literal(1), select().logicalPlan)
> }.queryExecution) { plan =>
> plan.executeTake(1).isEmpty
> }
> {code}
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