Github user felixcheung commented on a diff in the pull request:
https://github.com/apache/spark/pull/19105#discussion_r136691380
--- Diff: R/pkg/R/DataFrame.R ---
@@ -2714,6 +2714,40 @@ setMethod("unionAll",
union(x, y)
})
+#' Return a new SparkDataFrame containing the union of rows
+#'
+#' Return a new SparkDataFrame containing the union of rows in this
SparkDataFrame
+#' and another SparkDataFrame. This is different from both \code{UNION
ALL} and
+#' \code{UNION DISTINCT} in SQL as column positions are not taken into
account.
--- End diff --
I'd list `union()` here too
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