Github user actuaryzhang commented on a diff in the pull request:
https://github.com/apache/spark/pull/18114#discussion_r123328162
--- Diff: R/pkg/R/functions.R ---
@@ -34,6 +34,58 @@ NULL
#' df <- createDataFrame(cbind(model = rownames(mtcars), mtcars))}
NULL
+#' Date time functions for Column operations
+#'
+#' Date time functions defined for \code{Column}.
+#'
+#' @param x Column to compute on.
+#' @param format For \code{to_date} and \code{to_timestamp}, it is the
string to use to parse
+#' x Column to DateType or TimestampType. For \code{trunc},
it is the string used
--- End diff --
fixed
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