Github user sun-rui commented on a diff in the pull request:
https://github.com/apache/spark/pull/9835#discussion_r45723104
--- Diff: R/pkg/R/utils.R ---
@@ -624,15 +624,22 @@ convertNamedListToEnv <- function(namedList) {
env
}
-# Assign a new environment for attach() and with() methods
-assignNewEnv <- function(data) {
- stopifnot(class(data) == "DataFrame")
- cols <- columns(data)
- stopifnot(length(cols) > 0)
-
+# Put each column of a DataFrame into a new environment
+# putAsDataFrame:
+# TRUE - Put each column as a DataFrame into the new environment
+# FALSE - Put each column as a Column into the new environment
+columnIntoNewEnv <- function(df, putAsDataFrame = TRUE) {
+ stopifnot(class(df) == "DataFrame")
+ cols <- columns(df)
+
env <- new.env()
- for (i in 1:length(cols)) {
- assign(x = cols[i], value = data[, cols[i]], envir = env)
- }
+ lapply(seq_along(cols), function(i) {
+ if (putAsDataFrame) {
+ value <- df[, cols[i]]
--- End diff --
yes, will have a cache for the environment per DataFrame.
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