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createPool

信息

有关查询，请参阅 简单查询 和 准备好的语句 示例。

¥For queries please see the Simple Queries and Prepared Statements examples.

createPool(connectionUri)​

createPool(connectionUri: string)

import mysql from 'mysql2/promise';

try {
  const pool = mysql.createPool('mysql://root:password@localhost:3306/test');
  const connection = await pool.getConnection();
  // ... some query

  connection.release();
} catch (err) {
  console.log(err);
}
警告

完成后，不要忘记使用以下命令释放连接：

¥Don't forget to release the connection when finished by using:

  • pool.releaseConnection(connection)

  • connection.release()

createPool(config)​

createPool(config: PoolOptions)

import mysql from 'mysql2/promise';

try {
  const pool = mysql.createPool({
    host: 'localhost',
    user: 'root',
    database: 'test',
    // port: 3306,
    // password: '',
  });
  const connection = await pool.getConnection();
  // ... some query

  connection.release();
} catch (err) {
  console.log(err);
}
警告

完成后，不要忘记使用以下命令释放连接：

¥Don't forget to release the connection when finished by using:

  • pool.releaseConnection(connection)

  • connection.release()

createPool(config) — SHA1​

createPool(config: PoolOptions)

import mysql from 'mysql2/promise';

try {
  const pool = mysql.createPool({
    // ...
    passwordSha1: Buffer.from(
      '8bb6118f8fd6935ad0876a3be34a717d32708ffd',
      'hex'
    ),
  });
  const connection = await pool.getConnection();
  // ... some query

  connection.release();
} catch (err) {
  console.log(err);
}
警告

完成后，不要忘记使用以下命令释放连接：

¥Don't forget to release the connection when finished by using:

  • pool.releaseConnection(connection)

  • connection.release()

createPool(config) — SSL​

createPool(config: PoolOptions)

import mysql from 'mysql2/promise';

try {
  const pool = mysql.createPool({
    // ...
    ssl: {
      // key: fs.readFileSync('./certs/client-key.pem'),
      // cert: fs.readFileSync('./certs/client-cert.pem')
      ca: fs.readFileSync('./certs/ca-cert.pem'),
    },
  });
  const connection = await pool.getConnection();
  // ... some query

  connection.release();
} catch (err) {
  console.log(err);
}
警告

完成后，不要忘记使用以下命令释放连接：

¥Don't forget to release the connection when finished by using:

  • pool.releaseConnection(connection)

  • connection.release()

createPool(config) — RDS SSL​

createPool(config: PoolOptions)

你可以使用 Amazon RDS 字符串作为 ssl 属性的值，通过 SSL 连接到 Amazon RDS MySQL。

¥You can use Amazon RDS string as value to ssl property to connect to Amazon RDS MySQL over SSL.

在这种情况下，使用 https://s3.amazonaws.com/rds-downloads/mysql-ssl-ca-cert.pem CA 证书：

¥In that case https://s3.amazonaws.com/rds-downloads/mysql-ssl-ca-cert.pem CA cert is used:

npm install --save aws-ssl-profiles
import mysql from 'mysql2/promise';
import awsCaBundle from 'aws-ssl-profiles';

try {
  const pool = mysql.createPool({
    // ...
    host: 'db.id.ap-southeast-2.rds.amazonaws.com',
    ssl: awsCaBundle,
  });
  const connection = await pool.getConnection();
  // ... some query

  connection.release();
} catch (err) {
  console.log(err);
}
信息

有关详细说明，请遵循 AWS SSL 配置文件文档。

¥For detailed instructions, please follow the AWS SSL Profiles documentation.

测试
try {
  const [res] = await connection.query('SHOW `status` LIKE "Ssl_cipher"');
  await pool.end();

  console.log(res);
} catch (err) {
  console.log(err);
}
警告

完成后，不要忘记使用以下命令释放连接：

¥Don't forget to release the connection when finished by using:

  • pool.releaseConnection(connection)

  • connection.release()

createPool(config) — Socks​

createPool(config: PoolOptions)

const mysql = require('mysql2');
const SocksConnection = require('socksjs');

const socksProxy = new SocksConnection({ port: 3306 });
const pool = mysql.createPool({
  stream: socksProxy,
});
测试
pool.execute('SELECT SLEEP(1.1) AS `www`', (err, rows, fields) => {
  if (err instanceof Error) {
    console.log(err);
    return;
  }

  console.log(rows, fields);
});

pool.execute('SELECT SLEEP(1) AS `qqq`', (err, rows, fields) => {
  if (err instanceof Error) {
    console.log(err);
    return;
  }

  console.log(rows, fields);
});

pool.execute('SELECT SLEEP(1) AS `qqq`', (err, rows, fields) => {
  if (err instanceof Error) {
    console.log(err);
    return;
  }

  console.log(rows, fields);
});

词汇表​

¥Glossary

PoolOptions​

PoolOptions 扩展了 ConnectionOptions 中的所有选项：

¥PoolOptions extends all options from ConnectionOptions:

ConnectionOptions Specification
PoolOptions Specification