public Boolean produceFrom(ResultSet result) throws SQLException {
        String s = result.getString(1);
        if (s.equalsIgnoreCase(T))
            return true;
        if (s.equalsIgnoreCase(F))
            return false;
        int i = result.getInt(1);
        if (i == 1) return true;
        if (i == 0) return false;
        return result.getBoolean(1);
    }