ianmcook commented on a change in pull request #10780:
URL: https://github.com/apache/arrow/pull/10780#discussion_r676617698
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File path: r/R/dplyr-summarize.R
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@@ -18,19 +18,24 @@
# The following S3 methods are registered on load if dplyr is present
-summarise.arrow_dplyr_query <- function(.data, ...) {
- call <- match.call()
- .data <- arrow_dplyr_query(.data)
- if (query_on_dataset(.data)) {
- not_implemented_for_dataset("summarize()")
+summarise.arrow_dplyr_query <- function(.data, ..., .engine = c("arrow",
"duckdb")) {
+ if (match.arg(.engine) == "duckdb") {
+ tbl <- to_duckdb(.data)
+ dplyr::summarise(tbl, ...)
+ } else {
+ call <- match.call()
+ .data <- arrow_dplyr_query(.data)
+ if (query_on_dataset(.data)) {
+ not_implemented_for_dataset("summarize()")
+ }
+ exprs <- quos(...)
+ # Only retain the columns we need to do our aggregations
Review comment:
Why not also retain only the columns we need to do aggregations when
`.engine == "duckdb"`?
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