santosh-d3vpl3x commented on code in PR #37526:
URL: https://github.com/apache/spark/pull/37526#discussion_r948175216
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R/pkg/R/DataFrame.R:
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@@ -3577,40 +3577,90 @@ setMethod("str",
#' This is a no-op if schema doesn't contain column name(s).
#'
#' @param x a SparkDataFrame.
-#' @param col a character vector of column names or a Column.
-#' @param ... further arguments to be passed to or from other methods.
-#' @return A SparkDataFrame.
+#' @param col a list of columns or single Column or name.
+#' @param ... additional column(s) if only one column is specified in
\code{col}.
+#' If more than one column is assigned in \code{col}, \code{...}
+#' should be left empty.
+#' @return A new SparkDataFrame with selected columns.
#'
#' @family SparkDataFrame functions
#' @rdname drop
#' @name drop
-#' @aliases drop,SparkDataFrame-method
+#' @aliases drop,SparkDataFrame,character-method
+#' @family subsetting functions
#' @examples
-#'\dontrun{
-#' sparkR.session()
-#' path <- "path/to/file.json"
-#' df <- read.json(path)
-#' drop(df, "col1")
-#' drop(df, c("col1", "col2"))
-#' drop(df, df$col1)
+#' \dontrun{
+#' drop(df, "*")
+#' drop(df, "col1", "col2")
+#' drop(df, df$name, df$age + 1)
+#' drop(df, c("col1", "col2"))
+#' drop(df, list(df$name, df$age + 1))
#' }
-#' @note drop since 2.0.0
-setMethod("drop",
- signature(x = "SparkDataFrame"),
- function(x, col) {
- stopifnot(class(col) == "character" || class(col) == "Column")
+#' @note drop(SparkDataFrame, character) since 2.0.0
+setMethod("drop", signature(x = "SparkDataFrame", col = "character"),
Review Comment:
@HyukjinKwon Would you like to take another look?
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