mysql2

What is mysql2?

The mysql2 npm package is a fast and efficient MySQL client for Node.js that provides an easy-to-use API for interacting with MySQL databases. It supports promises and async/await, connection pooling, prepared statements, and more.

What are mysql2's main functionalities?

Basic Connection

This feature allows you to create a basic connection to a MySQL database and execute a query.

const mysql = require('mysql2');
const connection = mysql.createConnection({ host: 'localhost', user: 'root', database: 'test' });
connection.query('SELECT * FROM `table` WHERE `name` = "Page"', function(err, results) { console.log(results); });
connection.end();

Promise Wrapper

This feature provides a promise-based API for working with MySQL, which allows for the use of async/await for better asynchronous control flow.

const mysql = require('mysql2/promise');
async function queryDatabase() {
  const connection = await mysql.createConnection({ host: 'localhost', user: 'root', database: 'test' });
  const [rows, fields] = await connection.execute('SELECT * FROM `table` WHERE `name` = ?', ['Page']);
  console.log(rows);
  connection.end();
}
queryDatabase();

Connection Pooling

This feature allows you to create a pool of connections that can be reused, which is more efficient than creating a new connection for every query.

const mysql = require('mysql2');
const pool = mysql.createPool({ host: 'localhost', user: 'root', password: 'root', database: 'test', waitForConnections: true, connectionLimit: 10, queueLimit: 0 });
pool.query('SELECT * FROM `table`', function(err, results, fields) { console.log(results); });
pool.end();

Prepared Statements

This feature allows you to use prepared statements, which can improve performance and security by pre-compiling SQL queries and avoiding SQL injection.

const mysql = require('mysql2');
const connection = mysql.createConnection({ host: 'localhost', user: 'root', database: 'test' });
const statement = connection.prepare('SELECT * FROM `table` WHERE `id` = ?');
statement.execute([1], function(err, results) { console.log(results); });
statement.close();
connection.end();

Other packages similar to mysql2

mysql

The 'mysql' package is the original MySQL client for Node.js. It is similar to mysql2 but does not support promises natively, which means you would need to use a wrapper or callbacks for asynchronous operations.

mariadb

The 'mariadb' package is a Node.js client specifically designed for MariaDB databases. It is API-compatible with mysql2 but includes additional features and optimizations for MariaDB.

knex

Knex.js is a SQL query builder for Node.js that supports multiple database systems, including MySQL. It provides a more abstract way to build queries and can be used with mysql2 as the underlying database driver.

sequelize

Sequelize is an ORM (Object-Relational Mapping) library for Node.js. It provides a higher-level abstraction for database interactions and supports MySQL among other databases. Unlike mysql2, Sequelize allows you to work with data as objects and automatically handles the SQL generation.

README

MySQL2

English | 简体中文 | Português (BR)

MySQL client for Node.js with focus on performance. Supports prepared statements, non-utf8 encodings, binary log protocol, compression, ssl much more.

Table of Contents

• History and Why MySQL2
• Installation
• Documentation
• Acknowledgements
• Contributing

History and Why MySQL2

MySQL2 project is a continuation of MySQL-Native. Protocol parser code was rewritten from scratch and api changed to match popular Node MySQL. MySQL2 team is working together with Node MySQL team to factor out shared code and move it under mysqljs organization.

MySQL2 is mostly API compatible with Node MySQL and supports majority of features. MySQL2 also offers these additional features:

• Faster / Better Performance
• Prepared Statements
• MySQL Binary Log Protocol
• MySQL Server
• Extended support for Encoding and Collation
• Promise Wrapper
• Compression
• SSL and Authentication Switch
• Custom Streams
• Pooling

Installation

MySQL2 is free from native bindings and can be installed on Linux, Mac OS or Windows without any issues.

npm install --save mysql2

If you are using TypeScript, you will need to install @types/node.

npm install --save-dev @types/node

For TypeScript documentation and examples, see here.

Documentation

• Quickstart
  • First Query, Using Prepared Statements, Using Connection Pools and more.
• Documentation
• Examples
• FAQ

Acknowledgements

• Internal protocol is written by @sidorares MySQL-Native.
• Constants, SQL parameters interpolation, Pooling, ConnectionConfig class taken from Node MySQL.
• SSL upgrade code based on @TooTallNate code.
• Secure connection / compressed connection api flags compatible to MariaSQL client.
• Contributors.

Contributing

Want to improve something in MySQL2? Please check Contributing.md for detailed instruction on how to get started.

To contribute in MySQL2 Documentation, please visit the Website Contributing Guidelines for detailed instruction on how to get started.