Github user felixcheung commented on a diff in the pull request:
https://github.com/apache/spark/pull/17851#discussion_r114708146
--- Diff: R/pkg/R/DataFrame.R ---
@@ -3715,3 +3715,34 @@ setMethod("rollup",
sgd <- callJMethod(x@sdf, "rollup", jcol)
groupedData(sgd)
})
+
+#' hint
+#'
+#' Specifies execution plan hint on the current SparkDataFrame.
+#'
+#' @param x a SparkDataFrame.
+#' @param name a name of the hint.
+#' @param ... additional argument(s) passed to the method.
--- End diff --
hmm, yes ;)
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