Github user shivaram commented on a diff in the pull request:
https://github.com/apache/spark/pull/8908#discussion_r40457649
--- Diff: R/pkg/R/DataFrame.R ---
@@ -1848,3 +1848,28 @@ setMethod("crosstab",
sct <- callJMethod(statFunctions, "crosstab", col1, col2)
collect(dataFrame(sct))
})
+
+
+#' This function downloads the contents of a DataFrame into an R's
data.frame.
+#' Since data.frames are held in memory, ensure that you have enough memory
+#' in your system to accommodate the contents.
+#'
+#' @title Download data from a DataFrame into a data.frame
+#' @param x a DataFrame
+#' @return a data.frame
+#' @rdname as.data.frame
+#' @examples \dontrun{
+#'
+#' irisDF <- createDataFrame(sqlContext, iris)
+#' df <- as.data.frame(irisDF[irisDF$Species == "setosa", ])
+#' }
+setGeneric("as.data.frame")
--- End diff --
We have all the generics used in SparkR in R/generics.R -- Could you move
this to that file as well ?
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