Module polars_io::parquet

Available on crate feature parquet only.

Reading Apache parquet files.

Example

use polars_core::prelude::*;
use polars_io::prelude::*;
use std::fs::File;

fn example() -> PolarsResult<DataFrame> {
    let r = File::open("some_file.parquet").unwrap();
    let reader = ParquetReader::new(r);
    reader.finish()
}

Modules

• predicates

Structs

• BatchedParquetReader
• BatchedWriter
• BrotliLevel
• GzipLevel
• ParquetAsyncReadercloud
  A Parquet reader on top of the async object_store API. Only the batch reader is implemented since parquet files on cloud storage tend to be big and slow to access.
• ParquetReader
  Read Apache parquet format into a DataFrame.
• ParquetWriter
  Write a DataFrame to parquet format
• ZstdLevel
  Represents a valid zstd compression level.

Enums

• ParallelStrategy
• ParquetCompression