mapleFU commented on code in PR #48309:
URL: https://github.com/apache/arrow/pull/48309#discussion_r2583512443
##########
cpp/src/parquet/decoder.cc:
##########
@@ -147,6 +139,20 @@ struct ArrowBinaryHelper<ByteArrayType,
::arrow::BinaryType> {
return Status::OK();
}
+ Status ReserveInitialChunkData(std::optional<int64_t>
estimated_remaining_data_length) {
+ RETURN_NOT_OK(builder_->Reserve(entries_remaining_));
+ if (estimated_remaining_data_length.has_value()) {
+ int64_t required_capacity =
+ std::min(*estimated_remaining_data_length, chunk_space_remaining_);
+ // Ensure we'll be allocating a non-zero-sized data buffer, to avoid
encountering
+ // a null pointer
+ constexpr int64_t kMinReserveCapacity = 64;
Review Comment:
https://github.com/apache/arrow/blob/322516f3940120cb2eddf3b1f919b38f0c81b097/cpp/src/arrow/memory_pool_internal.h#L35
Maybe here rather than a null pointer?
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