Question

I’ve got a form in which I want to display either a download link for a BLOB or use a file browser field to do the same.

I can manage the file browser method normally, however because the BLOB I want to refer to isn’t part of the table the form is based on, I can’t seem to get it to show properly.
The best I’ve got so far is a ‘display only’ field with an SQL query returning the size of the file.

Answer 1

If you are using Oracle Application Express, you may youse the “P” procedure.

Just like the “F” procedure that you it to show pages, the P procedure allows you to download files from apex.

for example :
http://apex.shellprompt.net/pls/apex/p?n=217605020644166778
where that number at the end is the primary key number form the

select id 
  from apex_application_files

To add a file to this table, simple add a browse-file item on a page. Run the page, browse for a file, and submit the page. It will automatically insert it in this table.
you can query it after :

select id 
  from apex_application_files
where filename = YOUR_FILE

good post for this is : http://dgielis.blogspot.com/2007/08/oracle-apex-fp-pn-zp.html

test it out, tell me if you get stuck