Executing a sql in web.show_document before opening the page with URL

Question

Hi,
I have a function that returns a varchar2 into web.show_document in the form. Is there a way that web.show_document executes the varchar2 and get the output and open the URL. The result of the varchar2 execution is a URL.
CREATE TABLE MIS_TBL (MIS_COD VARCHAR2(10), MIS_VAL VARCHAR2(100) );
insert into MIS_TBL(MIS_COD,MIS_VAL) values ('RPTURL','/print');
Create or replace FUNCTION Get_String_MIS
in_v_MIS_Cod IN MIS_Tbl.MIS_Cod%TYPE ) RETURN VARCHAR2     
IS
l_v_String          MIS_Tbl.MIS_val%TYPE;
BEGIN
SELECT MIS_Val INTO l_v_String
FROM MIS_Tbl
WHERE MIS_Cod = in_v_MIS_Cod;
RETURN l_v_String;
END;
In the forms I have the following code in a trigger, uniform across many forms.
web.show_document(Get_String_MIS('RPTURL') || '/' || l_v_File_Name);
I can set any value to RPTURL from a reference data form. I want the above statement to execute the varchar returned by Get_String_MIS('RPTURL') and send the result of the execution to show_document.
The result of get_string_mis should be 'http://'||sys_context('userenv','host')||':9999/print' and this when executed gets the actual servername from sys_context('userenv','host')
At this time, I cannot change the function and many forms. I only have control of changing the value in MIS_TBL.
Any solution to my problem is greatly appreciated.
Thanks,
Ravi

Answer 1

Maybe you could rename your table and use a view pointing to that table instead? Then you could do the resolution directly in the database.
Something like
SELECT MIS_COD, MIS_VAL FROM MIS_TBL_NEW WHERE MIS_COD!='RPTURL'
UNION ALL
SELECT 'RPTURL',  'http://'||sys_context('userenv','host')||':9999/print' MIS_VAL FROM DUAL