AngersZhuuuu commented on issue #26500: [SPARK-29874][SQL]Optimize Dataset.isEmpty() URL: https://github.com/apache/spark/pull/26500#issuecomment-556984517 > > will add three shuffles by limit(), groupby() and count() > > have you confirmed? groupby + count is one operator called Aggregate. Updated, `count` won't trigger shuffle.
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