Github user gatorsmile commented on a diff in the pull request: https://github.com/apache/spark/pull/19394#discussion_r143315127 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlan.scala --- @@ -280,13 +280,20 @@ abstract class SparkPlan extends QueryPlan[SparkPlan] with Logging with Serializ results.toArray } + private[spark] def executeCollectIterator(): (Long, Iterator[InternalRow]) = { + val countsAndBytes = getByteArrayRdd().collect() + val total = countsAndBytes.map(_._1).sum + val rows = countsAndBytes.iterator.map(_._2).flatMap(decodeUnsafeRows) --- End diff -- -> `flatMap(o => decodeUnsafeRows(o._2))`
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