Call Direct SQL in X++

static void TestDirectSQLInXpp(Args _args)
{
    str sqltxt = "select * from custtable where custtable.accountnum == '4001'";
    source sqlcmd;
    XppCompiler compiler = new XppCompiler();
    custtable ct;
    ExecutePermission executePermission;
    common com;
    ;

    if (sqltxt)
    {
        sqlcmd = 'CustTable SQLSTMT(CustTable CustTable' +')\n{\n'+sqltxt+';\nreturn CustTable;\n}\n';
        if (compiler.compile(sqlcmd))
        {
            executePermission = new ExecutePermission();
            executePermission.assert();

            com = runbuf(sqlcmd,ct);

            ct = com;

            print ct.AccountNum;
        }
        else
        {
            setprefix("@SYS57538");
            info (sqlcmd);
            error (compiler.errorText());
        }
    }
    else
    {
        sqlcmd = '';

    }

    pause;
}