How to use a function in select clause

Question

hi gems...good evening...
I want to write a select clause from a function. The scenario is like below:
function parameters
CREATE OR REPLACE FUNCTION FUNCTION_DEMO(p_pid IN NUMBER,
p_bankerNum IN NUMBER,
p_banker_name IN VARCHAR2,
p_business_num IN NUMBER,
p_businesses IN table_typ_businesses)
return table_typ_bankers
as .......
global object and table types
CREATE OR REPLACE TYPE obj_typ_businesses AS OBJECT (businesses NUMBER);
CREATE OR REPLACE TYPE table_typ_businesses AS TABLE OF obj_typ_businesses;
CREATE OR REPLACE TYPE obj_typ_bankers AS OBJECT (banker_num NUMBER(10,0));
CREATE OR REPLACE TYPE table_typ_bankers IS TABLE OF obj_typ_bankers;
The select query
select * from
table(cast(FUNCTION_DEMO(1,
2,
'ALEX',
2,
table(cast(select businesses_id from reference_businesses) as table_typ_businesses) as table_typ_bankers)But it is giving error with Missing expression.
My function is compiled successfully. I just want to make the select query to view the output given by the function i.e the table type "table_typ_bankers".
Please help...thanks in advance..

Answer 1

Hi ,
You can check this and change your code by taking this as an example. I just noted down with simple one input and return as collection type
and how to use/call it in select statement.
SQL> CREATE OR REPLACE TYPE obj_typ_businesses AS OBJECT (businesses NUMBER)
  2  /
Type created.
SQL> CREATE OR REPLACE TYPE table_typ_businesses AS TABLE OF obj_typ_businesses
  2  /
Type created.
SQL> CREATE OR REPLACE TYPE obj_typ_bankers AS OBJECT (banker_num NUMBER(10,2))
  2  /
Type created.
SQL> CREATE OR REPLACE TYPE table_typ_bankers IS TABLE OF obj_typ_bankers
  2  /
Type created.
/* Now creating a demo function and just focusing on your one input as collection type  */
SQL> create or replace function f11 ( tab_rec  IN table_typ_businesses)
  2  return table_typ_bankers
  3  is
  4  t_val table_typ_bankers:= table_typ_bankers();
  5  begin
  6        dbms_output.put_line('tab_rec count -'||tab_rec.count);
  7
  8  for i in 1..tab_rec.count
  9              loop
10               dbms_output.put_line ('tab_rec value ('||i||')'||tab_rec(i).businesses);
11                       t_val.EXTEND;
12                    t_val(i) := obj_typ_bankers(tab_rec(i).businesses * 12.50);
13              end loop;
14              return t_val;
15  end;
16  /
Function created.
/* To run your function by a select statement */
SQL> SELECT * FROM TABLE(f11(table_typ_businesses(obj_typ_businesses(5),
  2                          obj_typ_businesses(12),
  3                                         obj_typ_businesses(18))
  4                                             ) )
  5  /
BANKER_NUM
      62.5
       150
       225
tab_rec count -3
tab_rec value (1)5
tab_rec value (2)12
tab_rec value (3)18Hope this will help you... :)
Thanks!
Ashutosh