Reports Arrow's current global CPU thread-pool capacity -- what parquet_set_arrow_threads last set it to, or Arrow's own hardware-derived default if it was never set. The counterpart to parquet_set_arrow_threads, and the answer to "how many threads will Arrow actually use here".
integer function parquet_get_arrow_threads() result(n) n = int(parquet_get_thread_pool_capacity()) end function parquet_get_arrow_threads