Using session state in ORDER BY

Question

I have a report region with a PL/SQL function body returning a query as
declare
q long;
begin
q:='select .....'
q:=q||' order by :P1_SORT1,:P1_SORT2';
end;where P1_SORT1 and P1_SORT2 have values from 1..8.
In other words, I would like to the ORDER BY to expand to ORDER BY m,n to sort by that column position in the SELECT list.
This doesn't seem to work. It seems to be getting excecuted as if it were order by '5','6' which doesn't work the same as order by 5,6Any ideas? What am I missing?
Thanks

Answer 1

Scott: I keep getting ORA-00936: missing expression when I try to save the Region. Currently, I am using the "Use Query-Specific Column Names and Validate Query" option. Would I need to change to use Generic columns, I hope not!
I guess I do need to change it to use generic columns, that is the only thing that works. I tried using the v('...') function as well in the ORDER BY but it ust doesn't let me save the region unless I use the Generic Columns.
Is this something Oracle specific or HTML DB specific? I mean, using bind variables in the ORDER BY clause.
Obviously, the reason I would like to use bind variables it to avoid flooding the shared pool with unique SQLs (in my real app, I have 4 sort columns, so I have 16 possible combinations of SQLs!)