Before Paramter form trigger problem

Question

In Before Paramter form trigger
function BeforePForm return boolean is
w_cnt number;
begin
if user <> 'PF' then
               select count(*)
               into w_cnt
               from tab
               where tname = 'PFMAST';
               if w_cnt > 0 then
                    srw.do_sql('drop table pfmast');
                    srw.do_sql('drop table pfloan');
                    srw.do_sql('drop table wspfcard1');
                    srw.do_sql('drop table wspfcard2');
               end if;
               srw.do_sql('create table pfmast as
               select *
               from pf.pfmast');
               srw.do_sql('create table pfloan as
               select *
               from pf.pfloan');
               srw.do_sql('create table wspfcard1 as
               select *
               from pf.wspfcard1');
               srw.do_sql('create table wspfcard2 as
               select *
               from pf.wspfcard2');
     end if;
return (TRUE);
end;
I am creating 4 temporary tables which are used in this report dynamically by adding the session id to this 4 table name.
It works fine till the parameter form is displayed. I choose the parameter and run the report. When i do that it agian tries to execute before parameter form trigger (which i can't understand why it is going to before parameter form trigger).
Kindly support
Thanking All in anticipation.

Answer 1

Hello,
http://www.oracle.com/webapps/online-help/reports/10.1.2/topics/htmlhelp_rwbuild_hs/rwrefex/plsql/triggers/tr_before_param_form.htm
Usage Notes
If the Parameter Form is used on the Web, the Before Parameter Form trigger fires twice: once when the Parameter Form is displayed, and a second time when the parameters are submitted. This is because Reports Builder executes in a stateless fashion. There is no session to return to, so the Before Parameter Form trigger has to fire the second time to ensure that the parameters selected on the Parameter Form and passed on the command line are valid.
Regards