Dynamic graphics generation inside plperlu query, odbc and MS Access display

Hi,

I'm trying to generate an image inside a plperlu function (PG 8.1.4), and to display it in a MS Access form, through ODBC.
I'm using the GD library for this. Here is the test code:

----------------------------------------------------------------------------
CREATE OR REPLACE FUNCTION test_gd
(
IN a int4,
IN b int4,

OUT val int4,
OUT image bytea
)
RETURNS SETOF record
AS

$$
#----------------------------------------------------------------------------
#-- Configuration des paramètres de la fonction
#----------------------------------------------------------------------------
@i = ('a', 'b');
@io = ();
@o = ('val','image');

#----------------------------------------------------------------------------
#-- Préparation des paramètres de la fonction
#----------------------------------------------------------------------------
&start_sub(@_);

#----------------------------------------------------------------------------
#-- Test GD
#----------------------------------------------------------------------------
use GD;

# create a new image
$im = new GD::Image(100,100);

# allocate some colors
$white = $im->colorAllocate(255,255,255);
$black = $im->colorAllocate(0,0,0);

# make the background transparent and interlaced
$im->transparent($white);

# Put a black frame around the picture
$im->rectangle(0,0,99,99,$black);

# Draw a blue oval
$im->arc(50,50,95,75,0,360,$black);

# And fill it with red
$im->fill(50,50,$black);

$output{'image'} = $im->gif;
$output{'val'} = $input{'a'} + $input{'b'};
ret(@_);

#----------------------------------------------------------------------------
#-- Helper functions
#----------------------------------------------------------------------------
end_sub(@_);

sub start_sub
{
init(@_);
}

sub end_sub
{
return undef;
}

sub init
{
$c = 0;
foreach $i (@i) {$input{$i} = @_[$c++]};
foreach $io (@io) {$input{$io} = @_[$c]; $output{$io} = @_[$c++]};
foreach $o (@o) {$output{$o} = @_[$c++]};
}

sub ret
{
while (($key, $value) = each %output) {if (!defined($value)) {elog(ERROR, 'Valeur indéfinie pour ' . $key)}};
return_next \%output;
init(@_);
}

$$

LANGUAGE 'plperlu';
----------------------------------------------------------------------------

The function looks good. If I run inside pgAdmin:

select * from test_gd('7', '3');

I get:

val image
--------------
10 GIF89ad

The problem is that I'm unable to display anything in a MS Access form, and I'm not quite sure how to do it. I've been using a "bytea" column type, is that correct?

In Ms Access, I've created a pass-through query, linked it to a form with an OLE Dependant Control. But... Nothing. Same Problem id I try wbmp or jpeg images.

Does anyone have an idea how to do this?

Thanks.

Note: I'm using the latest driver: psqlodbc-08_02_0002.zip

----------------------------------
Philippe Lang, Ing. Dipl. EPFL
Attik System
rte de la Fonderie 2
1700 Fribourg
Switzerland
http://www.attiksystem.ch

Tel: +41 (26) 422 13 75
Fax: +41 (26) 422 13 76