Express router refactoring with bind (improved)

router.get('/api/v1/foobars', getFoobars);
router.get('/api/v1/foobars/baz/:baz', getFoobarsForBaz);

function getFoobars(req, res) {
	var queryString = "select * from foobar;";
	executeQuery(res, queryString);
}

function getFoobarsForBaz(req, res){
	var queryString = "select * from foobar where baz = $1;";
	var queryParameters = [req.params.baz];
	executeQuery(res, queryString, queryParameters);
}

function executeQuery(res, queryString, queryParameters){
	var queryHandler = pgQuery.bind(undefined, res, queryString, queryParameters); 
	pg.connect(connectionString, queryHandler);
}

function pgQuery(res, queryString, queryParameters, err, client, done){
		
		var results = [];
		var query = (typeof(queryParameters) !== 'undefined') ? 
				client.query(queryString, queryParameters) : client.query(queryString);
		
		query.on('row', function(row){
			results.push(row);	
		});

		query.on('end', function(){
			done();
			res.json(results);
		});
		
		query.on('error', function(err){
			done();
			console.log(err);
		}

		if(err){
			console.log(err);
		}
}