Function Logic

Question

Hi All,
I created a function call which builds a WHERE clause
CREATE OR REPLACE FUNCTION test(p_organization_in IN VARCHAR2)
RETURN VARCHAR2 IS
v_where_clause VARCHAR2(1000);
CURSOR c_cur IS
SELECT organization,
channel_id,
hierarchy_id
FROM application_filter
WHERE organization = p_organization_in;
BEGIN
FOR c_rec IN c_cur LOOP
IF c_rec.hierarchy_id IS NOT NULL THEN
v_where_clause := 'WHERE COL5 = '|| c_rec.hierarchy_id;
ELSE
v_where_clause := 'WHERE COL5 IN( '|| c_rec.channel_id ||')';
END IF;
END LOOP;
RETURN v_where_clause;
END test;
The issue i have is for some organizations i have more than one channel_id. With this i am only getting the last processed channel_id in the WHERE clause. If i have 5 channel_id's i am getting the last one. I want the WHERE clause to show the multiple channel_id's for example WHERE COL5 IN(1,2,3,4....)
Thanks in advance

Answer 1

Something like this..?
sql > select * from application_filter;
ORGANIZATION CHANNEL_ID HIERARCHY_ID
         100          1            1
         100          2            2
         100          3            3
         200          1            1
create or replace function test(
     p_organization in application_filter.organization%type)
   return varchar2 is
  l_where_clause varchar2(200);
begin
   for v_rec in (select channel_id
                      from application_filter
                        where organization = p_organization
                ) loop
       if (l_where_clause is null)  then
          l_where_clause := v_rec.channel_id;
          dbms_output.put_line(l_where_cluase); 
       else
          l_where_clause := l_where_clause || ',' || v_rec.channel_id;
          dbms_output.put_line(l_where_clause);
        end if;
   end loop;
   l_where_clause := ' where channel_id in (  ||
                     l_where_clause ||
   return l_where_clause;
end;
sql > select test(200) where_clause from dual;
WHERE_CLAUSE
  where channel_id in ( 1   )
sql > select test(100) where_clause from dual;
WHERE_CLAUSE
  where channel_id in ( 1,2,3   )Let me know if it helps..
Thanks,
Rajesh.