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Refresh parquet readme / contributing guide #1252

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Feb 2, 2022
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Refresh parquet readme / contributing guide #1252

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5 changes: 5 additions & 0 deletions parquet/CONTRIBUTING.md
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Original file line number Diff line number Diff line change
Expand Up @@ -59,3 +59,8 @@ Run `cargo bench` for benchmarks.

To build documentation, run `cargo doc --no-deps`.
To compile and view in the browser, run `cargo doc --no-deps --open`.

## Update Supported Parquet Version

To update Parquet format to a newer version, check if [parquet-format](https://github.com/sunchao/parquet-format-rs)
version is available. Then simply update version of `parquet-format` crate in Cargo.toml.
30 changes: 3 additions & 27 deletions parquet/README.md
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Expand Up @@ -23,38 +23,12 @@

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.

## Example

Example usage of reading data:

```rust
use std::fs::File;
use std::path::Path;
use parquet::file::reader::{FileReader, SerializedFileReader};

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This example is row oriented -- I am working on a PR that has some more realistic examples (and will include them on the docs.rs landing page)

let file = File::open(&Path::new("/path/to/file")).unwrap();
let reader = SerializedFileReader::new(file).unwrap();
let mut iter = reader.get_row_iter(None).unwrap();
while let Some(record) = iter.next() {
println!("{}", record);
}
```

For an example of reading to Arrow arrays, please see [here](https://docs.rs/parquet/latest/parquet/arrow/index.html)

See [crate documentation](https://docs.rs/parquet/latest/parquet/) for the full API.
See [crate documentation](https://docs.rs/parquet/latest/parquet/) for examples and the full API.

## Rust Version Compatbility

This crate is tested with the latest stable version of Rust. We do not currrently test against other, older versions of the Rust compiler.

## Supported Parquet Version
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the supported format is already listed in the features section -- moved this content to contributing guide


- Parquet-format 4.0.0

To update Parquet format to a newer version, check if [parquet-format](https://github.com/sunchao/parquet-format-rs)
version is available. Then simply update version of `parquet-format` crate in Cargo.toml.

## Features

- [x] All encodings supported
Expand All @@ -63,11 +37,13 @@ version is available. Then simply update version of `parquet-format` crate in Ca
- [x] Primitive column value readers
- [x] Row record reader
- [x] Arrow record reader
- [x] Async support (to Arrow)
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assumes #1154 is merged

- [x] Statistics support
- [x] Write support
- [x] Primitive column value writers
- [ ] Row record writer
- [x] Arrow record writer
- [ ] Async support
- [ ] Predicate pushdown
- [x] Parquet format 4.0.0 support

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