sql-js/sql.js
Sql.js
sql.js is a serverless, in-memory SQL database engine that ports SQLite to WebAssembly for use within a web browser. It provides a JavaScript interface to initialize relational databases, execute SQL queries, and manage structured data without requiring a backend server.
The project enables the import and export of database states using typed arrays, allowing in-memory data to be persisted as files. It supports high-precision integer retrieval via BigInt and utilizes prepared statements to increase execution speed and security.
The engine includes capabilities for client-side data management and relational querying, with the ability to offload intensive database operations to background worker threads to maintain user interface responsiveness.
Features
- In-Browser Database Engines - Provides a relational database engine compiled to WebAssembly for execution entirely within the web browser.
- WebAssembly Engines - Provides a full relational database engine compiled to WebAssembly for execution entirely within a web browser.
- Browser Databases - Implements a full relational database for storing and querying structured data entirely within the web browser.
- Client-Side Data Processing - Facilitates the complete pipeline of importing, querying, and exporting relational data directly in the browser.
- In-Memory Databases - Implements a serverless SQL database that stores and queries relational data within a virtual memory buffer.
- Wasm-Based Interfaces - Provides a programmatic JavaScript interface to initialize and query the underlying WebAssembly-based SQLite engine.
- Relational Database Management Systems - Provides a robust relational database management system for storing structured information in tables within the browser.
- Typed Arrays - Uses JavaScript typed arrays to map the database's linear memory and internal state for efficient access.
- Serverless SQLite Managers - Provides a serverless SQLite implementation that manages relational data without requiring a separate database server.
- SQL Query Execution - Implements the core process of running SQL statements and retrieving structured data results.
- Client-Side Querying - Enables the execution of SQL statements to read and write data within a standalone in-memory engine.
- Relational Local Storage - Provides relational local storage using a WebAssembly-ported engine for serverless data management.
- WebAssembly Glue Code Generators - Provides the necessary JavaScript glue code to interface between the high-level API and the WebAssembly-compiled SQLite engine.
- Database Export - Allows exporting the current in-memory database state as a binary typed array for local persistence.
- Database Seeding via Import - Enables loading existing database files into memory via typed arrays to initialize the application state.
- Prepared Statements - Supports prepared statements to increase query execution speed and protect against SQL injection.
- Binary Buffer Management - Implements binary buffer management using typed arrays to handle the in-memory database state for import and export.
- Local Database Persistence - Ensures data persists across browser sessions by saving and loading in-memory database files.
- Virtual File System Layers - Implements a virtual file system layer to simulate disk operations within the browser's memory.
- Worker Thread Patterns - Employs worker thread patterns to offload heavy database computations and keep the user interface responsive.
- Background Processing Workers - Offloads intensive database operations to background worker threads to prevent freezing the main user interface.
- SQLite Derivates - Listed in the “SQLite Derivates” section of the Awesome Sqlite awesome list.
