Github user felixcheung commented on a diff in the pull request:
https://github.com/apache/spark/pull/20787#discussion_r176925842
--- Diff: R/pkg/R/functions.R ---
@@ -1957,8 +1958,12 @@ setMethod("levenshtein", signature(y = "Column"),
})
#' @details
-#' \code{months_between}: Returns number of months between dates \code{y}
and \code{x}.
-#'
+#' \code{months_between}: Returns number of months between dates \code{y}
and \code{x}.
+#' If \code{y} is later than \code{x}, then the result is positive.
+#' If \code{y} and \code{x} are on the same day of month, or both are the
last day of month,
+#' time of day will be ignored.
+#' Otherwise, the difference is calculated based on 31 days per month, and
rounded to
+#' 8 digits.
#' @rdname column_datetime_diff_functions
--- End diff --
also just as reference, the whitespace/newline will be stripped
```
time of day will be ignored.
Otherwise
```
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