function Get_Handler(info: hdlr_rec) :Integer;

begin
    ...
    process information passed in via the info record...
    open file ....
data_end := 0;
while (data_end = 0) do
begin
    exec sql get data (:seg_buf=segment,
            :seg_len = segmentlength,
             :data_end = dataend)
         with maxlength = :max_len;
        write segment to file...
end;

. . .
set info record to return appropriate values...
...
            Get_Handler := 0; {return value ignored }
    end;
begin
-- INSERT a long varchar value chapter_text into
-- the table book using the datahandler Put_Handler
-- The argument passed to the datahandler the record
-- hdlr_arg.
--
                ...
        ...
        exec sql insert into book (chapter_num, chapter_name, chapter_text)
                values (5, 'One Dark and Stormy Night',
                datahandler(Put_Handler(hdlr_arg)));
        ...

-- Select the long varchar column chapter_text from the table book.
-- The Datahandler (Get_handler) will be invoked for each non-null value of
-- column chapter_text retrieved. For null values the indicator variable
-- will be set to "-1" and the datahandler will not be called.
        ...
            ...
            exec sql select chapter_text into
                 datahandler(Get_Handler(hdlr)arg)):indvar
                 from book;
            exec sql begin;
                 process row....
            exec sql end;
            ...
end.