setWasNullColumnIndex(columnIndex);
    public byte[] getBytes(int columnIndex) throws  SQLException {        if (((getXsqlvar(columnIndex).sqltype & ~1) != GDS.SQL_TEXT)             &&((getXsqlvar(columnIndex).sqltype & ~1) != GDS.SQL_VARYING)) {            throw new SQLException("Wrong type for column " + columnIndex + "type should be" + getXsqlvar(columnIndex).sqltype);        }        return (byte[])row[columnIndex - 1];    }