Modul/node_modules/mariadb

MariaDB Node.js connector

Non-blocking MariaDB and MySQL client for Node.js.

MariaDB and MySQL client, 100% JavaScript, with TypeScript definition, with the Promise API.

version before 2.4 is compatible with Node.js 6+ version after 2.4 is compatible with Node.js 10+

Documentation

See promise documentation for detailed API.

Callback documentation describe the callback wrapper for compatibility with existing drivers.

Why a New Client?

While there are existing MySQL clients that work with MariaDB, (such as the mysql and mysql2 clients), the MariaDB Node.js Connector offers new functionality, like Insert Streaming, Pipelining, ed25519 plugin authentication while making no compromises on performance.

Insert Streaming

Using a Readable stream in your application, you can stream INSERT statements to MariaDB through the Connector.

    
    https.get('https://someContent', readableStream => {
        //readableStream implement Readable, driver will stream data to database 
        connection.query("INSERT INTO myTable VALUE (?)", [readableStream]);
    });

Pipelining

With Pipelining, the Connector sends commands without waiting for server results, preserving order. For instance, consider the use of executing two INSERT statements.

The Connector doesn't wait for query results before sending the next INSERT statement. Instead, it sends queries one after the other, avoiding much of the network latency.

For more information, see the Pipelining documentation.

Bulk insert

Some use cases require a large amount of data to be inserted into a database table. By using batch processing, these queries can be sent to the database in one call, thus improving performance.

For more information, see the Batch documentation.

Benchmarks

MariaDB provides benchmarks comparing the Connector with popular Node.js MySQL clients, including:

• promise-mysql version 4.0.4 + mysql version 2.17.1
• mysql2 version 1.6.5

promise-mysql  : 646 ops/sec ±2.20%
mysql2         : 746 ops/sec ±2.35%
mariadb        : 961 ops/sec ±2.82%

query: SELECT < all mysql fields >, 1 FROM mysql.user LIMIT 1

For more information, see the Benchmarks page.

Quick Start

The MariaDB Connector is available through the Node.js repositories. You can install it using npm :

$ npm install mariadb

Using ECMAScript < 2017:

const mariadb = require('mariadb');
const pool = mariadb.createPool({host: process.env.DB_HOST, user: process.env.DB_USER, connectionLimit: 5});
pool.getConnection()
    .then(conn => {
    
      conn.query("SELECT 1 as val")
        .then(rows => { // rows: [ {val: 1}, meta: ... ]
          return conn.query("INSERT INTO myTable value (?, ?)", [1, "mariadb"]);
        })
        .then(res => { // res: { affectedRows: 1, insertId: 1, warningStatus: 0 }
          conn.release(); // release to pool
        })
        .catch(err => {
          conn.release(); // release to pool
        })
        
    }).catch(err => {
      //not connected
    });

Using ECMAScript 2017:

const mariadb = require('mariadb');
const pool = mariadb.createPool({host: process.env.DB_HOST, user: process.env.DB_USER, connectionLimit: 5});

async function asyncFunction() {
  let conn;
  try {

	conn = await pool.getConnection();
	const rows = await conn.query("SELECT 1 as val");
	// rows: [ {val: 1}, meta: ... ]

	const res = await conn.query("INSERT INTO myTable value (?, ?)", [1, "mariadb"]);
	// res: { affectedRows: 1, insertId: 1, warningStatus: 0 }

  } catch (err) {
	throw err;
  } finally {
	if (conn) conn.release(); //release to pool
  }
}

Contributing

If you would like to contribute to the MariaDB Node.js Connector, please follow the instructions given in the Developers Guide.

To file an issue or follow the development, see JIRA.