# Apache Parquet Official Native Rust Implementation
[](https://crates.io/crates/parquet)
[](https://docs.rs/parquet/latest/parquet/)
This crate contains the official Native Rust implementation of [Apache Parquet](https://parquet.apache.org/), which is part of the [Apache Arrow](https://arrow.apache.org/) project.
See the [API documentation](https://docs.rs/parquet/latest) for examples and the full API.
The API documentation for most recent, unreleased code is available [here](https://arrow.apache.org/rust/parquet/index.html).
## Rust Version Compatibility
This crate is tested with the latest stable version of Rust. We do not currently test against other, older versions of the Rust compiler.
## Versioning / Releases
The `parquet` crate follows the [SemVer standard] defined by Cargo and works well
within the Rust crate ecosystem. See the [repository README] for more details on
the release schedule, version and deprecation policy.
[semver standard]: https://doc.rust-lang.org/cargo/reference/semver.html
[repository readme]: https://github.com/apache/arrow-rs
Note that for historical reasons, this crate uses versions with major numbers
greater than `0.x` (e.g. `19.0.0`), unlike many other crates in the Rust
ecosystem which spend extended time releasing versions `0.x` to signal planned
ongoing API changes. Minor arrow releases contain only compatible changes, while
major releases may contain breaking API changes.
## Feature Flags
The `parquet` crate provides the following features which may be enabled in your `Cargo.toml`:
- `arrow` (default) - support for reading / writing [`arrow`] arrays to / from Parquet
- `async` - support `async` APIs for reading Parquet
- `json` - support for reading / writing `json` data to / from Parquet
- `brotli` (default) - support for Parquet using `brotli` compression
- `flate2` (default) - support for Parquet using `gzip` compression
- `lz4` (default) - support for Parquet using `lz4` compression
- `zstd` (default) - support for Parquet using `zstd` compression
- `snap` (default) - support for Parquet using `snappy` compression
- `cli` - parquet [CLI tools](https://github.com/apache/arrow-rs/tree/main/parquet/src/bin)
- `crc` - enables functionality to automatically verify checksums of each page (if present) when decoding
- `experimental` - Experimental APIs which may change, even between minor releases
- `simdutf8` (default) - Use the [`simdutf8`] crate for SIMD-accelerated UTF-8 validation
[`arrow`]: https://crates.io/crates/arrow
[`simdutf8`]: https://crates.io/crates/simdutf8
## Parquet Feature Status
- [x] All encodings supported
- [x] All compression codecs supported
- [x] Read support
- [x] Primitive column value readers
- [x] Row record reader
- [x] Arrow record reader
- [x] Async support (to Arrow)
- [x] Statistics support
- [x] Write support
- [x] Primitive column value writers
- [ ] Row record writer
- [x] Arrow record writer
- [x] Async support
- [x] Predicate pushdown
- [x] Parquet format 4.0.0 support
## License
Licensed under the Apache License, Version 2.0: <http://www.apache.org/licenses/LICENSE-2.0>.