Github user dilipbiswal commented on a diff in the pull request: https://github.com/apache/spark/pull/21857#discussion_r205566676 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala --- @@ -1947,6 +1947,21 @@ class Dataset[T] private[sql]( Except(planWithBarrier, other.planWithBarrier) } + /** + * Returns a new Dataset containing rows in this Dataset but not in another Dataset while + * preserving the duplicates. + * This is equivalent to `EXCEPT ALL` in SQL. + * + * @note Equality checking is performed directly on the encoded representation of the data + * and thus is not affected by a custom `equals` function defined on `T`. + * + * @group typedrel + * @since 2.4.0 + */ + def exceptAll(other: Dataset[T]): Dataset[T] = withSetOperator { + Except(planWithBarrier, other.planWithBarrier, true) --- End diff -- @gatorsmile will change
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