Github user shivaram commented on a diff in the pull request:
https://github.com/apache/spark/pull/12493#discussion_r60315638
--- Diff: R/pkg/inst/worker/worker.R ---
@@ -100,7 +104,20 @@ if (isEmpty != 0) {
# Timing reading input data for execution
inputElap <- elapsedSecs()
- output <- computeFunc(partition, data)
+ if (isDataFrame) {
+ if (deserializer == "row") {
+ # Transform the list of rows into a data.frame
+ data <- do.call(rbind.data.frame, c(data, stringsAsFactors =
FALSE))
+ }
--- End diff --
If deserializer is not `row` can we add a check to see if `data` is a valid
`data.frame` ? (I'm guess the UDFs assume that is the input type)
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