wjones127 commented on a change in pull request #11894:
URL: https://github.com/apache/arrow/pull/11894#discussion_r779754498
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File path: r/R/dataset-scan.R
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@@ -185,17 +183,36 @@ ScanTask <- R6Class("ScanTask",
#' `data.frame`? Default `TRUE`
#' @export
map_batches <- function(X, FUN, ..., .data.frame = TRUE) {
- if (.data.frame) {
- lapply <- map_dfr
- }
- scanner <- Scanner$create(ensure_group_vars(X))
+ # TODO: possibly refactor do_exec_plan to return a RecordBatchReader
Review comment:
JIra created: https://issues.apache.org/jira/browse/ARROW-15271
Added to the comment as well.
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