pitrou commented on code in PR #43661:
URL: https://github.com/apache/arrow/pull/43661#discussion_r2510843507
##########
cpp/src/arrow/dataset/file_parquet.cc:
##########
@@ -627,6 +693,9 @@ Result<RecordBatchGenerator>
ParquetFileFormat::ScanBatchesAsync(
[this, options, parquet_fragment, pre_filtered,
row_groups](const std::shared_ptr<parquet::arrow::FileReader>& reader)
mutable
-> Result<RecordBatchGenerator> {
+ // Since we already do the batching through the SlicingGenerator, we don't
need the
+ // reader to batch its output.
+ reader->set_batch_size(std::numeric_limits<int64_t>::max());
Review Comment:
Thanks for the explanation @scott-routledge2 .
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