How to call Plsql function in discoverer

Hello,
Can anyone tell me how to call plsql fuunction in Oracle Business Intelligence Desktop Discoverer?
what i was doing here is i am able to register my function in Administration but i dont know when i need to make call and where i need to pass parameters to make call that function.
its lil urgent, can any of you guys send me the instructions step by step
Thanks in advance!!
sid

Thanks for your reply Michael,some how i found that make call from calculation , but the problem here is i was not able to pass parameter thru function.please find the scenario below,
case(1) i have function without parameters, it does some DML operations inside that and it is working fine.when i refresh i see tables getting populated.
case(2)I have another function as shown below with parameters(input) but i was getting error (One of The function arguments has an incorrect datatype:POST_SAVE_DOCUMENT)
my function is like this:
create or replace function POST_SAVE_DOCUMENT
(P_WORKBOOKOWNER in VARCHAR2,
P_WORKBOOK in VARCHAR2,
P_WORKSHEET in VARCHAR2,
P_SEQUENCE in number,
P_SQL_SEGMENT in VARCHAR2
return number AS
BEGIN
delete from my_sql;
insert into my_sql
( WORKBOOKOWNER,
WORKBOOK,
WORKSHEET,
SEG_SEQUENCE,
SQL_SEGMENT)
VALUES ( P_WORKBOOKOWNER,
P_WORKBOOK,
P_WORKSHEET,
P_SEQUENCE,
P_SQL_SEGMENT
return 1;
end;
i dont see anything wrong here with in this function, but some how i have a problem with parameter.
Can you give some idea or solution to get rid of this problem.
Finally ..i did not see anything under item radio button (The recommended way now is to click the Items radio button, find an item that you want to pass to a parameter, then on the right-hand side highlight the placeholder for the parameter, then finally you click the Paste button. You repeat this for all the parameters and then click OK to finish the calculation.
Thanks in adavance!!
Thanks
S!D
Edited by: user12861418 on Apr 28, 2010 2:01 PM

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