KNOWN ISSUE: Problem using GET_PRINT_DOCUMENT to produce multiple PDFs.

Question

Hi Folks
I'm calling a report stored in APEX (Shared Components Report Query & Layout) many times using a loop in a process on my page.
At each iteration of the loop I am updating the value of a hidden text item on the page which is the one and only parameter of the report.
I update the hidden text item using APEX_UTIL.SET_SESSION_STATE.
The first time I call the report from the process it works perfectly, the .pdf file is produced and stored in a BLOB column in the database.
The problem is that all subsequent iterations of the loop to produce the report result in a report .pdf being generated and stored but with no database values. As if the hidden text item value was NULL or not valid for the query.
I know there is no problem with the report queries or the parameter values I am using. I have tested this by forcing the initial value set by APEX_UTIL.SET_SESSION_STATE to be the next record I would have supplied in the loop. Again, the first report is generated with data and all subsequent reports get generated with no data.
It appears that whilst I can use APEX_UTIL.SET_SESSION_STATE to loop through and update the value of the hidden text item my report refers to for it's parameter, the report process only seems to recognise the first iteration and none of the subsequent ones.
Can anyone shed any light on this or offer any suggestions?
Many thanks
Dogfighter.

Answer 1

Hi Scott.
I have set up a bare bones demo of what the page looks like. You'll see what I'm doing.
You can have a poke around using...
Workspace :SIMONGADD
User ID :[email protected]
Password :hopeli
I have not created the report query & template but suffice to say, in the real world app the report query has one parameter. In this demo example the report query would end with..
"where order_id = :P1_ORDER_ID"
I have tried, in my app, setting the :P1_ORDER_ID to text/hidden/display only. no difference in behavior.
My logging insert statement records that the order ID is being updated in each iteration of the loop.
I have noted the behavior of the report output is as follows...
1) First report is generated perfectly.
2) Second report DOES include two bits of data (out of dozens)
3) Third report & onwards contain no data at all but the PDF files and placeholder structure of the reports are generated.
If I force the loop to start providing order_ids in a different order, or from a different starting order number I get the same behavior. The first order PDF is produced perfectly (so I deduce no issues with the query or the template), the second one just contains data in the same two report items, and the third and subsequent reports are empty.
Any suggestions welcome.
I would be happy to email you the report template rtf, query, and report outputs if you like.
Kind regards
Simon