Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/10577#discussion_r48930909
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala ---
@@ -608,7 +609,9 @@ class Dataset[T] private[sql](
* duplicate items. As such, it is analogous to `UNION ALL` in SQL.
* @since 1.6.0
*/
- def union(other: Dataset[T]): Dataset[T] = withPlan[T](other)(Union)
+ def union(other: Dataset[T]): Dataset[T] = withPlan[T](other){ (left,
right) =>
--- End diff --
ah damn - @marmbrus we called it union in Dataset and unionAll in DataFrame
...
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