Get Image by url in database

[patrice canonici]

Hi all

fist, know that It is my first message on this list and I'm working
for the first time with MapServer.

I'm trying to configure WMS MapServer. I'm using a PostGIS database to
store polygon, called datastrip. For each datastrip I have an image,
the path to the image is store into an other table (image).
an image entry refer a datastrip.

I successfully write the mapfile to get datastrip. But now, I would
like to get image for datastrip.

I tryed the following bloc into the mapfile, but it doesn't work :

LAYER
	NAME "image"
	CONNECTIONTYPE postgis
	CONNECTION "user=testeur dbname=pocdb host=localhost"
	TYPE RASTER
	DATA "imagename from (SELECT  i.folder_url || '\' || i.filename as
imagename from datastrip d, image i WHERE
d.datastrip_id=i.datastrip_id)"
END

it seams that the meaning to get the data information (i.e. db
connection) is not take n into account. the return message is
something like "unable to acces file imagename from (SELECT
i.folder_url || '\' || i.filename as imagename from datastrip d, image
i WHERE d.datastrip_id=i.datastrip_id)"

I set the SHAPEPATH attribute, to complete the image path (the path
into db is relative to the SHAPEPATH value)

I try to replace DATA value by "foo.gif", and it works.

Is there a way to get the image url from my db ? without catch the
request, get the BBOX, make an interest with it and the datastrip
table and finally get image for each datastrip on this BBOX, write on
the fly a mapfile ..etc ...

thanks
Patrice