How to use the mysql.createClient function in mysql

}
    var sql = 'select * from ' + table + ' where `' + key + '` in (' 
        + qs.join(',') + ')';
    mysql_db.query(sql, values, function(err, rows) {
        var objs = null;
        if(rows) {
            objs = {};
            rows.forEach(function(row){
                objs[row[key]] = row;
            });
        }
        callback(err, objs);
    });
};

var mysql_db = mysql.createClient(conf.database);
//mysql_db.connect(function(err) {
//    if(err) {
//        console.error('connect db ' + mysql_db.host + ' error: ' + err);
//        process.exit();
//    }
//});

exports.mysql_db = mysql_db;

function loadClient(callback) {
	client = mysql.createClient({
		user: config.user,
		password: config.password,
		host: config.host,
		port: config.port,
	}).on("error", function(err) {
			console.log("DB ERROR: " + err);
			client = null;
	});

	// switch to target database
	client.useDatabase( config.database ,function(err) {
		if(err) {
			console.log("DB ERROR: Database cannot select db, detail: " + err);
			client = null;
		}

var mysql = require('mysql');
var queues = require('mysql-queues');
// подключение к базе данных
var client = mysql.createClient({
    user: 'username',
    password: 'password'
});
client.query('USE databasenm');
// связывание очередей с запросом
// использование отладки
queues(client, true);
// создание очереди
q = client.createQueue();
// вставка
q.query(
    'INSERT INTO nodetest2 (title, text, created) ' + 'values(?,?,NOW())',
    ['Title for 8', 'Text for 8']
);
// обновление
q.query(

var mysql = require('mysql'),
settings = require('./settings').shorten_settings;

//Load this SQL manually if you'd prefer
var sqlStructure = "CREATE TABLE IF NOT EXISTS `shorten_linkmaps` (`id` int(11) NOT NULL AUTO_INCREMENT,`linkDestination` varchar(512) NOT NULL,`linkHash` varchar(8) NOT NULL,`timestamp` datetime NOT NULL,PRIMARY KEY (`id`)) ENGINE=MyISAM  DEFAULT CHARSET=latin1;CREATE TABLE IF NOT EXISTS `shorten_linkstats` (`id` int(11) NOT NULL AUTO_INCREMENT,`ip` char(15) NOT NULL,`userAgent` varchar(255) NOT NULL,`referrer` varchar(512) NOT NULL,`timestamp` datetime NOT NULL,`linkId_id` int(11) NOT NULL,PRIMARY KEY (`id`),KEY `shorten_linkstats_11e70f3` (`linkId_id`)) ENGINE=MyISAM  DEFAULT CHARSET=latin1;";

var devOrLive = process.argv[2];
var mysqlc;

if (devOrLive == "dev"){
	mysqlc = mysql.createClient({host: settings.dev_mysql.host, user: settings.dev_mysql.user, password: settings.dev_mysql.password, database: settings.dev_mysql.dbname, port: settings.dev_mysql.port});
	makeDB();
}else if(devOrLive == "live"){
	mysqlc = mysql.createClient({host: settings.live_mysql.host, user: settings.live_mysql.user, password: settings.live_mysql.password, database: settings.live_mysql.dbname, port: settings.live_mysql.port});
	makeDB();
}else{
	console.log("usage: node setup_db.js dev");
	console.log("   OR: node setup_db.js live");
}

function makeDB(){
	mysqlc.query(sqlStructure, function(err, results, fields){
		if (err === null){
			console.error("DB initalized for " + devOrLive);
			process.exit(1);
			return true;
		}else{
			console.error(err);
			process.exit(1);
			return false;

_resetConnection: function() {
      if (this.realClient) this.realClient.destroy();
      this.realClient = mysql.createClient(options);
      this.realClient.on('error', function(e) {
        console.log("database connection down: " + e.toString());
      });
    },
    ping: function(client_cb) {

exports.getSession = function(cb) {
    var that = {};
    var opts = {
						host: hostname,
						port: port,
						database: db,
						user: username,
						password: password
		 	  };
    var client;
    function handleDisconnect() {
      connection = mysql.createConnection(opts); 
    }
    if(typeof(mysql.createConnection)=='undefined'){
      client = mysql.createClient(opts);
    }else{
      client = new mysql.createConnection(opts);
      client.connect(function(err) {
        if(err){
          console.error(err);
          setTimeout(handleDisconnect, 2000);
        }
     });
      client.on('error', function(err) {
      	console.error(err);
        if(err.code === 'PROTOCOL_CONNECTION_LOST') { 
          handleDisconnect();                         
        } else {                                      
          throw err;                                  
        }
      });

cmbot.prototype.getMysqlClient = function() {
	var cmbot = this;
	var mysql = false;
	try {
		mysql = require('mysql').createClient({
			host: cmbot.options.mysql.host,
			user: cmbot.options.mysql.user,
			password: cmbot.options.mysql.password
		});
		mysql.query('USE ' + cmbot.options.mysql.database);
	} catch(e) {}
	return mysql;
};

exports.connect = function(config, intern, callback) {
  var db;

  internals = intern;

  internals.interfaces.SeederInterface._makeParamArgs = dummy;

  if (typeof(mysql.createConnection) === 'undefined') {
    db = config.db || new mysql.createClient(config);
  } else {
    db = config.db || new mysql.createConnection(config);
  }
  callback(null, new MysqlDriver(db));
};

var mysql = require('mysql')
  , DATABASE = 'node_test'
  , TABLE = 'members'
  , client = mysql.createClient({
      user: 'node'
    , password: 'pass'
  });

client.query('USE ' + DATABASE);

var mysqlUtil = module.exports = {
    insertUser: function(user, res) {
      client.query(
          'INSERT INTO ' + TABLE + ' SET name = ?, email = ?'
        , [user.name, user.email]
        , function(err) {
            client.query(
                'SELECT * FROM ' + TABLE + ' WHERE name = ?'
              , [user.name]
              , function(err, results, fields) {

mysql: function (conf) {
    var mysql = require('mysql');
    var client = mysql.createClient(conf);
    return require('./ext-mysql-client.js')(client);
  },
  sqlite: function (conf) {