README.md

Rust-SQLite (SQLRite)

Rust-SQLite, aka SQLRite , is a simple embedded database modeled off SQLite, but developed with Rust. The goal is get a better understanding of database internals by building one.

What I cannot create, I do not understand. — Richard Feynman

key value Design and discussions about direction of the project going on over here. Show us your support by buying us a coffee, so we can keep building cool stuff. (coming soon) Documentation (coming soon) Come and Chat about databases with us

Read the series of posts about it:

What would SQLite look like if written in Rust?

• Part 0 - Overview
• Part 1 - Understanding SQLite and Setting up CLI Application and REPL
• Part 2 - SQL Statement and Meta Commands Parser + Error Handling
• Part 3 - Understanding the B-Tree and its role on database design

CREATE TABLE and INSERT Statements

Requirements

Before you begin, ensure you have met the following requirements:

• Rust (latest stable) – How to install Rust
• SQLite3

Usage (TBD)

> ./rust_sqlite -- help
SQLRite 0.1.0
Joao Henrique Machado Silva <joaoh82@gmail.com>
Light version of SQLite developed with Rust

USAGE:
    rust_sqlite

FLAGS:
    -h, --help       Prints help information
    -V, --version    Prints version information

Project Progress

Not checked means I am currently working on.

• CLI and REPL Interface
• Parse meta commands and sql commands.
• Execute simple commands
• Standarized error handling
• Generic validation structure for SQL Commands.
• Create Table Command Parsing
• Improve error handling with https://github.com/dtolnay/thiserror
• Added support for parsing duplicate columns on CREATE TABLE
• Added support for parsing multiple PRIMARY KEY on CREATE TABLE
• In memory BTreeMap indexes initially only for PRIMARY KEYS.
• Simple INSERT queries command parsing.
• Implementation UNIQUE key constraints.
• Improve Error Handling and return without Panic!
• Simple SELECT queries (Single WHERE clause and no JOINS).
• Serialization | Deserialization to and from binary encodings (bincode).

Roadmap

Features that are in the roadmap of the project:

Ideally in order of priority, but nothing set in stone.

• Implement Open command to load database with a command .open
• Joins
  • INNER JOIN (or sometimes called simple join)
  • LEFT OUTER JOIN (or sometimes called LEFT JOIN)
  • CROSS JOIN
  • The RIGHT OUTER JOIN and FULL OUTER JOIN are not supported in SQLite.
• WAL - Write Ahead Log Implementation
• Pager Module
  • Implementing transactional ACID properties
  • Concurrency
  • Lock Manager
• Composite Indexing - cost and performance gain analysis
• Benchmarking vs SQLite for comparison
• Server Client / Connection Manager
• Different implementations of storage engines and data structures to optimize for different scenarios
  • Write Heavy - LSM Tree && SSTable
  • Read Heavy - B-Tree

Contributing

Pull requests are warmly welcome!!!

For major changes, please open an issue first and let's talk about it. We are all ears!

If you'd like to contribute, please fork the repository and make changes as you'd like and shoot a Pull Request our way!

Please make sure to update tests as appropriate.

If you feel like you need it go check the GitHub documentation on creating a pull request.

Code of Conduct

Contribution to the project is organized under the terms of the Contributor Covenant, the maintainer of SQLRite, @joaoh82, promises to intervene to uphold that code of conduct.

Contact

If you want to contact me you can reach me at joaoh82@gmail.com.

Inspiration

• https://cstack.github.io/db_tutorial/