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[SPARK-45755][SQL] Improve Dataset.isEmpty() by applying global limit 1 #43617

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[SPARK-45755][SQL] Improve Dataset.isEmpty() by applying global limit 1 #43617

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8bac7b5
Push down limit through Dataset.isEmpty()
wangyum Nov 1, 2023
81db8b5
Merge branch 'apache:master' into SPARK-45755
wangyum Nov 1, 2023
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Push down limit through Dataset.isEmpty()
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@wangyum
wangyum committed Nov 1, 2023
commit 8bac7b5e507fca10d26b0e26d00c65d89fbc4789
2 changes: 1 addition & 1 deletion sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
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Expand Up @@ -650,7 +650,7 @@ class Dataset[T] private[sql](
* @group basic
* @since 2.4.0
*/
def isEmpty: Boolean = withAction("isEmpty", select().queryExecution) { plan =>
def isEmpty: Boolean = withAction("isEmpty", select().limit(1).queryExecution) { plan =>
plan.executeTake(1).isEmpty
}

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