Lexical parameters

Question

I have a item table containing all the item no's of varchar datatype as the master key.
In reports I have item no as a parameter which on selection displays all the details abt the item.
In the LOV I have also included 'ALL' which on selection displays all the details of all the item no's.
I have written the following After Parameter Form Trigger
function AfterPForm return boolean is
begin
     IF :PF_1 = 'ALL' THEN
     :PF_1 := NULL;
ELSE
     :PF_1 := 'AND S.ITEM =' ||:PF_1;
END IF;
return (TRUE);
end;
Here PF_1 is the parameter which returns item no.
The above displayed code is working fine when 'ALL' is selected but when ypu select individual product no's (e.g. P001) it displays the following error.
Rep-1401:'afterpform':Fatal PLSQL error ocurred.
ORA-06502:PLSQL:numeric or value error.
Please anyone can tell me how to rectify the error.

Answer 1

Also you can check the type of :PF_1, you can also try this:
PF_1 := 'AND S.ITEM like' ||:PF_1;
So,you code remains as follow,
begin
IF :PF_1 = 'ALL' THEN
:PF_1 := NULL; --or you can put :PF_1:='AND 1=1'
ELSE
:PF_1 := 'AND S.ITEM like ' ||:PF_1;
END IF;
return (TRUE);
end;
If you're working with reports 6i,you can also try this:
PF_1 := 'AND S.ITEM =='||''''||:PF_1||'''';
I found some trouble that were solve adding ""
aguero