node-oracle原生模块对oracle进行查询时为何总显示不出数据

var bindings = require('./oracle_bindings'); //oracle_bindings是我在vs2012下编译出来的, var async = require('async'); //使用了node-oracle源代码，大家有没知道原因的 var oracle = new bindings.OracleClient();

async.waterfall( [

    function  ConnectDataBase(callback) {
	oracle.connect({ "hostname": "localhost", "user": "his", "password": "his" }, function(err, connection) {
		console.log("conneted")
		callback(err,connection);	
    });	
},
function DeleteData(connection,callback)
{
		var self=this;
		this.connection=connection;
		self.connection.execute("select* FROM person WHERE NAME = (:1)", ['huangwei'],function(err, results) {
		self.connection.setAutoCommit(true);
		callback(err,results);
}); 	  
}

], function(err,results) { if(err) { throw err; } console.log(results);

} );