nealrichardson commented on a change in pull request #11032:
URL: https://github.com/apache/arrow/pull/11032#discussion_r725227252
##########
File path: r/tests/testthat/test-dataset.R
##########
@@ -672,3 +672,33 @@ test_that("Collecting zero columns from a dataset doesn't
return entire dataset"
c(32, 0)
)
})
+
+
+test_that("dataset RecordBatchReader to C-interface to arrow_dplyr_query", {
+ ds <- open_dataset(ipc_dir, partitioning = "part", format = "feather")
+
+ # export the RecordBatchReader via the C-interface
+ stream_ptr <- allocate_arrow_array_stream()
+ scan <- Scanner$create(ds)
+ reader <- scan$ToRecordBatchReader()
+ reader$export_to_c(stream_ptr)
+
+ # then import it and check that the roundtripped value is the same
+ circle <- RecordBatchStreamReader$import_from_c(stream_ptr)
+
+ # create an arrow_dplyr_query() from the recordbatch reader
+ reader_adq <- arrow_dplyr_query(circle)
+
+ tab_from_c_new <- reader_adq %>%
+ dplyr::collect()
+ expect_equal(
+ tab_from_c_new %>%
+ arrange(dbl),
Review comment:
You should be able to arrange before collect, that is supported.
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