Report based on dynamic query

Question

I have done the same way as shown in the 'How To document'. But it does not work. It just ignores what is mentioned inside the if-end if construct. I have used the sample application itself and followed exactly what is mentioned in the article.The output is the same for 'ALL' as well as any other category selected.
I have observed that in the report region, the report type namely 'PL/SQL function body returning SQL Query', the if construct just does not work as expected. The code is accepted without throwing any errors but, the result is only one half works, mostly the if portion, what follows the else is ignored.
I am not sure whether i am committing a mistake somewhere or there is a bug in the application builder itself.
Can anybody throw light on this.
I am using application express 2.1 version

Answer 1

Thanks for your response.
The How-to document that referred is available here in the following url:
http://www.oracle.com/technology/products/database/application_express/howtos/dynamic_report.html
the PL/SQL code is given below. P22_show is the item name(select list).
declare
q varchar2(4000);
begin
q:=' select p.category, ';
q:=q||' p.product_name, ';
q:=q||' i.quantity, ';
q:=q||' i.unit_price ';
q:=q||' from demo_product_info p, ';
q:=q||' demo_order_items i ';
q:=q||' where p.product_id = i.product_id ';
if :p22_show != 'ALL' then
q:=q||'and p.category = :p22_show';
end if;
return q;
end;