How to use the mysql.Client function in mysql

if (v200) {
      // V2.0+ API
      this._dbClient = mysql.createConnection({
          host     : this._connectionParams.host,
          user     : this._connectionParams.user,
          password : this._connectionParams.password,
          port : this._connectionParams.port,
          database : this._connectionParams.database
      });
      this._dbClient.connect( _.bind( this._onConnectionInitialization, this ) );
  } else {
      // Old APIs
      if( v092 ) {
          this._dbClient = mysql.createClient();//V0.9.2+ API
      } else {
          this._dbClient = new mysql.Client();//old API
      }  
      
      this._dbClient.host = this._connectionParams.host;
      this._dbClient.port = this._connectionParams.port;
      this._dbClient.user = this._connectionParams.user;
      this._dbClient.password = this._connectionParams.password;
      this._dbClient.database = this._connectionParams.database;
      
      if( v092 ) {
        this._onConnectionInitialization( null );//V0.9.2+ API : no explicit "connect()"
      } else {
        this._dbClient.connect( _.bind( this._onConnectionInitialization, this ) );//old API
      }
  } 
  
};

fs = require('fs'),
    crypto = require('crypto'),
    Client = require('mysql').Client,
    parser = require('uglify-js').parser,
    uglifyer = require('uglify-js').uglify;

var RedisStore = require('connect-redis')(express);

/*  ==============================================================
    Configuration
=============================================================== */

//used for session and password hashes
var salt = '20sdkfjk23';

var client = new Client();
client.host = 'hostname';
client.user = 'username';
client.password = 'password';
client.database = 'bookmarks';

var app = express.createServer();

app.use(express.bodyParser());
app.use(express.cookieParser());
app.use(express.session({ secret: salt, store: new RedisStore, cookie: { maxAge: 3600000 * 24 * 30 } }));
app.use(express.methodOverride());
app.use(express.logger({ format: ':method :url' }));

delete express.bodyParser.parse['multipart/form-data'];

app.use('/css', express.static(__dirname + '/public/css'));

function setup_db2(cb) {
    var _settings = clone(settings.db2);
    delete _settings.database;
    var client;
    try {
        client = mysql[conn_method](_settings);
    } catch (e) {
        client = new mysql.Client(_settings);
        client.connect();
    }

    client.query('CREATE DATABASE ' + settings.db2.database, function (err) {
        client.end();
        if (!(err && (err.number == mysql.ERROR_DB_CREATE_EXISTS || err.number == 1007))) {
            throw err;
        }
        cb(null);
    });
}

function setup_db(cb) {
    var _settings = clone(settings.db1);
    delete _settings.database;
    var client;
    try {
        client = mysql[conn_method](_settings);
    } catch (e) {
        client = new mysql.Client(_settings);
        client.connect();
    }

    client.query('CREATE DATABASE ' + db, function (err) {
        if (!(err && (err.number == mysql.ERROR_DB_CREATE_EXISTS || err.number == 1007))) {
            throw err;
        }
    });
    client.query('USE ' + db);
    client.query('drop table if exists widgets');
    client.query(table_sql, function (err) {
        client.end();
        assert.ifError(err);
        cb(null, true);
    });
}

var mysql = require('mysql'),
    sys = require("sys"),
    undef;

var client = new mysql.Client;

exports.debugMode = false;
exports.useCache = false;

function ucwords(str) {
   str = str.split("_");

   for (i = 0; i < str.length; ++i) {
       str[i] = str[i].substring(0, 1).toUpperCase() + str[i].substring(1).toLowerCase();
   }

   return str.join('');
}

function debug (m) {
    if (exports.debugMode) {

create: function (callback) {
                var client;
                if (mysql.hasOwnProperty(conn_method)) {
                    client = mysql[conn_method](settings);
                } else {
                    console.log("\nEasyMySQL [WARNING]: node-mysql 0.9.1 support is deprecated.\n");
                    client = new mysql.Client(settings);
                    client.connect();
                }
                callback(null, client);
            },

}, function (body) {
    var configuration = JSON.parse(body);
    mysql = configuration.databases.mysql

    client            = new Client()
    client.host       = mysql.hostname
    client.user       = mysql.user
    client.password   = mysql.password
    client.database   = mysql.name

    client.query("\
      SELECT columns.* \
        FROM information_schema.tables AS tables \
        JOIN information_schema.columns AS columns USING (table_schema, table_name) \
       WHERE table_type = 'BASE TABLE' AND tables.table_schema = ? \
    ", [ mysql.name ], async());
  }, function  (results) {
    results.forEach(function (column) {

var sys = require('sys'),
    fs = require('fs'),
    Client = require('mysql').Client;

var client = new Client();

exports.close = function() {
    client.end();
}

exports.reconnect = function() {
    exports.initialize(function(){});
}

exports.initialize = function(callback) {
    this._getDatabaseSettingsFromConfig(function (hostname, username, password, database){
        client.user = username;
        client.password = password;
        client.host = hostname;
        client.connect();
        client.query('USE ' + escape(database));

function getClient() {
    var client = new mysql.Client(db_cred);
    client.database = 'shoutbox';
    client.connect();
    return client;
}