λykiaDB

Lykia is a document database management system built for educational purposes. The famous book, Crafting Interpreters, was the main source of inspiration for the project. It turned into a database, though.

Overview

• 100% safe Rust, #BlazinglyFast
• A weird scripting and query language, combination of JavaScript and SQL. The language is a separate module thus can be used without the database.
• A subset of JSON data types in both scripting language itself and storage
• In-disk and in-memory storage
• ACID compliance
• Replication

Primary goals

• Core scripting language + DML/DDL SQL
• Client and server apps
• A minimal standard library
• Query planning and binding (in progress)
• Query execution (in progress)
• Persistent storage engine (in progress)
• Transactions and multi-version concurrency control

Phase 2 goals

• Bytecode execution
• Query optimization

Phase 3 goals

• Replication with Raft
• JIT execution for expression evaluation

Non-goals

• LykiaDB is not (and will not be) a production-grade database.

Getting Started

To use Lykia, you can download the latest release from the GitHub releases page.

Developing via client:

cargo run-script dev-client

Run the server:

$ cargo run --release --bin lykiadb-server

Run the shell:

$ cargo run --release --bin lykiadb-shell lykiadb-shell/examples/fib.ly

Flamegraph a benchmark:

$ sudo cargo flamegraph --bench interpreter -- --bench

For playground, please visit lykia-rs/playground

License

Lykia is licensed under the Apache License, Version 2.0. See LICENSE for the full license text.