if (columnIndex > fixedStmt.getInSqlda().sqlvar.length) throw new SQLException("invalid column index");
    protected FBField getField(int columnIndex) throws SQLException {        FBField thisField = FBField.createField(getXsqlvar(columnIndex));        if (thisField instanceof FBBlobField)            ((FBBlobField)thisField).setConnection(c);        else        if (thisField instanceof FBStringField)            ((FBStringField)thisField).setConnection(c);        return thisField;    }