Github user felixcheung commented on a diff in the pull request:
https://github.com/apache/spark/pull/8920#discussion_r41336150
--- Diff: R/pkg/R/DataFrame.R ---
@@ -1290,8 +1290,10 @@ setClassUnion("characterOrColumn", c("character",
"Column"))
#' Sort a DataFrame by the specified column(s).
#'
#' @param x A DataFrame to be sorted.
-#' @param col Either a Column object or character vector indicating the
field to sort on
+#' @param col A character or Column object vector indicating the fields to
sort on
#' @param ... Additional sorting fields
+#' @param decreasing A logical argument indicating sorting order for
columns which are specified
+#' with their string names
--- End diff --
should we say something like `decreasing` is 'when a character vector is
specified for col'?
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