Add Range in query ax 2012

static void AddRangeToQuery(Args _args)
{
    Query q = new Query();  // Create a new query.
    QueryRun qr;
    CustTable ct;
    QueryBuildDataSource qbr1;
    str strTemp;
    ;

    // Add a single datasource.
    qbr1 = q.addDataSource(tablenum(CustTable));
    // Name the datasource 'Customer'.
    qbr1.name("Customer");

    // Create a range value that designates an "OR" query like:
    // customer.AccountNum == "4000" || Customer.CreditMax > 2500.

    // Add the range to the query data source.
    qbr1.addRange(fieldNum(CustTable, AccountNum)).value(
    strFmt('((%1.%2 == "US-012") || (%1.%3 > 100))',
        qbr1.name(),
        fieldStr(CustTable, AccountNum),
        fieldStr(CustTable, CreditMax)));

    // Print the data source.
    print qbr1.toString();
    info(qbr1.toString());

    // Run the query and print the results.
    qr = new QueryRun(q);

    while (qr.next())
    {
        if (qr.changedNo(1))
        {
            ct = qr.getNo(1);
            strTemp = strFmt("%1 , %2", ct.AccountNum, ct.CreditMax);
            //print strTemp;
            info(strTemp);
        }
    }
    pause;
}