Github user felixcheung commented on a diff in the pull request:
https://github.com/apache/spark/pull/17825#discussion_r114928953
--- Diff: R/pkg/R/generics.R ---
@@ -387,6 +387,16 @@ setGeneric("value", function(bcast) {
standardGeneric("value") })
#' @export
setGeneric("agg", function (x, ...) { standardGeneric("agg") })
+#' alias
+#'
+#' Set a new name for a Column or a SparkDataFrame. Equivalent to SQL "AS"
keyword.
+#'
+#' @name alias
+#' @rdname alias
+#' @param object x a Column or a SparkDataFrame
+#' @param data new name to use
--- End diff --
shouldn't we have a `@return` here? perhaps to say
```
Returns a new SparkDataFrame or Column with an alias set.
For Column, equivalent to SQL "AS" keyword.
@return a new SparkDataFrame or Column
```
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