Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/23131#discussion_r236054278
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala ---
@@ -1852,6 +1852,19 @@ class Dataset[T] private[sql](
CombineUnions(Union(logicalPlan, other.logicalPlan))
}
+ /**
+ * Returns a new Dataset containing union of rows in this Dataset and
another Dataset.
--- End diff --
Done.
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