#thrift #parquet #read #byte #write #reader #async-read

polars-parquet-format

Safe Parquet and Thrift reader and writer (sync and async)

1 unstable release

0.1.0 Oct 27, 2024

#629 in Encoding

Download history 2678/week @ 2024-10-26 2139/week @ 2024-11-02 5119/week @ 2024-11-09 5373/week @ 2024-11-16 5597/week @ 2024-11-23 7836/week @ 2024-11-30 9211/week @ 2024-12-07 9060/week @ 2024-12-14 7614/week @ 2024-12-21

34,804 downloads per month
Used in 59 crates (via polars-parquet)

MIT AND Apache-2.0

550KB
13K SLoC

parquet-format-safe

This crate contains an implementation of Thrift and generated Rust code associated to Parquet's thrift definition.

  • supports sync and async read API
  • supports sync and async write API
  • the write API returns the number of written bytes
  • the read API is panic free
  • the read API has a bound on the maximum number of possible bytes read, to avoid OOM.

The Rust generated code is done by a fork of thrift's compiler, available at https://github.com/coastalwhite/thrift/tree/safe.

Usage

To regenerate the thrift format implementation in Rust.

nix-shell
generate_parquet_format
mv parquet.rs src/parquet_format.rs

Dependencies

~230KB