delta-rs

A native interface to Delta Lake.

Table of Contents

• About
  • Features
• Get Involved
  • Development Meeting
  • Development
  • Rust
  • Python
  • Ruby

About

This library provides low level access to Delta tables in Rust, which can be used with data processing frameworks like datafusion, ballista, polars, vega, etc. It also provides bindings to other higher level languages such as Python or Ruby.

Features

Supported backends:

• Local file system

• AWS S3

• Azure Data Lake Storage Gen 2 (HOW-TO)

• Google Cloud Storage

Table 1. Support features

Operation/Feature	Rust	Python	Ruby
Read table	✔️	✔️	✔️
Stream table update	✔️	✔️
Filter files with partitions	✔️	✔️
Vacuum (delete stale files)	#97	#97
History	✔️	✔️
Write transactions	✔️
Checkpoint creation	✔️
High-level file writer		#542
Optimize	#98

Get Involved

Join #delta-rs in the Delta Lake Slack workspace

Development Meeting

We have a standing development sync meeting for those that are interested. The meeting is held every two weeks at 9am PST on Tuesday mornings. The direct meeting URL is shared in the Slack channel above ☝️ before the meeting.

These meetings are also streamed live via YouTube if you just want to listen in.

Development

delta-rs requires the Rust compiler, which can be installed with the rustup command.

Running tests can be done with cargo test in the root directory, or one of the directories below:

Rust

The rust/ directory contains core Rust APIs for accessing Delta Lake from Rust, or for higher-level language bindings.

Python

The python/ directory contains the deltalake Python package built on top of delta-rs

Ruby

The ruby/ directory contains an early prototype of a Ruby library built on top of delta-rs