Sqlite Select查询，其中条件不返回任何值

Question

我已经为选择查询尝试了所有可能的格式：

var queryCust = "SELECT * FROM customers WHERE CustBarcode = '" + CustomerBarcode + "';";

或

var queryCust = "SELECT * FROM customers WHERE CustBarcode like '" + CustomerBarcode + "';";

或

var queryCust = "SELECT * FROM customers WHERE cast(CustBarcode as text) = '" + CustomerBarcode "';";

或带有和不带有''，但没有任何效果，查询未返回任何值！

我什至尝试过

db.executeSql('SELECT * FROM customers WHERE CustBarcode = ?', [ CustBarcode ], function(rs) {...

但是没有用，即使试图用javascript CustBarcode转换为字符串或整数。

下面是函数：

alert(queryCust);

db.executeSql(queryCust, [], function(rs) {
    alert(rs.rows.item(0).CustBarcode);

    var DescCust = "";

    if (rs.rows.item(0).Status == 'NEW'){
        DescCust = rs.rows.item(0).Desc + ' ' + rs.rows.item(0).Address;
    } else {
        DescCust = rs.rows.item(0).CustCode + ' ' + rs.rows.item(0).Desc + ' ' + rs.rows.item(0).Address;
    }

    document.getElementById("custDesc").innerHTML = DescCust;

}, function(error) {
    alert('SELECT SQL statement ERROR while building DescCust: ' + error.message);
});