MilanSQL is a custom relational SQL database engine developed entirely in C++17, designed to provide a robust, high-performance database solution with extensive features and zero external dependencies. This project has evolved through 117 development phases, showcasing a complete implementation of SQL functionalities coupled with modern architectural design.

Key Features

• Full SQL Support: Includes core CRUD operations (SELECT, INSERT, UPDATE, DELETE), calling of stored procedures, and support for complex queries through JOINs, subqueries, and window functions.
• Robust Transactions: Employs multi-version concurrency control (MVCC), write-ahead logging (WAL), and provides savepoints and transaction management.
• Dynamic Replication: Features both physical and logical replication options, ensuring data integrity and availability.
• Custom Networking Protocols: Supports multiple protocols, including TCP, MySQL Wire, PostgreSQL Wire, REST API, and GraphQL, making it flexible for various applications.
• Advanced Analytics: Offers built-in support for time-series data and efficient operations with features such as ARRAY aggregates and window functions.

Documentation

MilanSQL is accompanied by comprehensive documentation:

• SQL Reference: Detailed command reference covering all phases of development.
• Tutorial: A hands-on guide to getting started.
• Architecture: Insights into the internal workings of the engine, including its structure and components.
• Live Demo: Experience MilanSQL directly through a web-based demo.

Getting Started

MilanSQL can be quickly launched from the command line:

# Start the interactive REPL
git clone https://github.com/haidar9819-lang/milansql.git
cd milansql
cmake -B build -G Ninja && ninja -C build
./build/milansql.exe --http --port 8080

This command initiates the database server facilitating interactive SQL queries.

Client Drivers

MilanSQL provides client drivers for various programming languages, enhancing accessibility:

• Python: pip install milansql
• Node.js: npm install milansql
• Java: Use com.milansql:milansql-jdbc:5.0.0
• Rust: cargo add milansql
• .NET: dotnet add package MilanSQL.Data

Performance Benchmarking

MilanSQL v5.8.0 has shown impressive performance metrics:

Overall, MilanSQL represents a significant step in custom database solutions, combining a powerful feature set with a lightweight framework conducive to both development and production use.