Github user actuaryzhang commented on a diff in the pull request:
https://github.com/apache/spark/pull/18114#discussion_r123327948
--- Diff: R/pkg/R/functions.R ---
@@ -2348,26 +2336,18 @@ setMethod("n", signature(x = "Column"),
count(x)
})
-#' date_format
-#'
-#' Converts a date/timestamp/string to a value of string in the format
specified by the date
-#' format given by the second argument.
-#'
-#' A pattern could be for instance \preformatted{dd.MM.yyyy} and could
return a string like '18.03.1993'. All
+#' @section Details:
+#' \code{date_format}: Converts a date/timestamp/string to a value of
string in the format
+#' specified by the date format given by the second argument. A pattern
could be for instance
+#' \code{dd.MM.yyyy} and could return a string like '18.03.1993'. All
#' pattern letters of \code{java.text.SimpleDateFormat} can be used.
-#'
#' Note: Use when ever possible specialized functions like \code{year}.
These benefit from a
#' specialized implementation.
#'
-#' @param y Column to compute on.
-#' @param x date format specification.
+#' @rdname column_datetime_diff_functions
#'
-#' @family date time functions
-#' @rdname date_format
-#' @name date_format
-#' @aliases date_format,Column,character-method
+#' @aliases date_format date_format,Column,character-method
#' @export
-#' @examples \dontrun{date_format(df$t, 'MM/dd/yyy')}
--- End diff --
Added back.
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