ConnectToMySQLFromAWSLambda

db.js

'use strict';
 
const mysql = require('mysql'); // require mysql
 
// If 'client' variable doesn't exist
if (typeof client === 'undefined') {
  
  // Connect to the MySQL database
  var client = mysql.createConnection({
    // your connection info
  });
 
  client.connect()
}
 
module.exports.handler = (event, context, callback) => {
  
  // This will allow us to freeze open connections to a database
  context.callbackWaitsForEmptyEventLoop = false;
 
  client.query('SELECT * FROM `table_name`', function (error, results) {
    callback(null, results)
  })
  
}