leitor de parquet usando rust

parquet_reader.rs

use std::fs::File;
use parquet::arrow::arrow_reader::ParquetRecordBatchReaderBuilder;

fn main(){
    let file_path = "Flights_1m.parquet";
    let file = File::open(file_path).unwrap();
    // let builder = ParquetRecordBatchReaderBuilder::try_new(file).unwrap();
    let builder = ParquetRecordBatchReaderBuilder::try_new(file).unwrap();
    println!("Converted arrow schema is: {}", builder.schema());
    let mut reader = builder.build().unwrap();

    while let Some(Ok(record_batch)) = reader.next() {
        for i in 0..record_batch.num_columns() {
            let column = record_batch.column(i);
            println!("Column {}: {:?}", i, column);
        }
    }
}