isParamSet[columnIndex-1] = true;
    protected FBField getField(int columnIndex) throws SQLException {         if (columnIndex > fields.length)            throw new FBSQLException(                     "Invalid column index.",                     FBSQLException.SQL_STATE_INVALID_COLUMN);                     isParamSet[columnIndex-1] = true;         return fields[columnIndex-1];    }