Calling a user defined function in a select statement

Question

PLS-00231: function 'F_GET_PROJECT_ID' may not be used in SQL
I am caling a user defined function 'F_GET_PROJECT_ID' in a select statement and getting the above error .
Can any one help me to resolve it.
I can not replace the function with a local variable nor can I assign the output of the function to a variable and use the variable in the sql stmt. cos, the in put parameters of the function comes from the same select statement.
Please help
Thanks in advance

Answer 1

Can you provide your function code? Using a function like that is possible from the below example. I suspect something in your function code.
SQL> create or replace function sample_func(p_sal number)
  2  return number
  3  is
  4  v_sal number;
  5  begin
  6     v_sal := p_sal+100;
  7     return v_sal;
  8  end;
  9  /
Function created.
SQL>
SQL> select empno, ename, sal, sample_func(sal)
  2  from emp
  3  /
     EMPNO ENAME             SAL SAMPLE_FUNC(SAL)
      7839 KING             5000             5100
      7698 BLAKE            2850             2950
      7782 CLARK            2450             2550
      7566 JONES            2975             3075
      7654 MARTIN           1250             1350
      7499 ALLEN            1600             1700
      7844 TURNER           1500             1600
      7900 JAMES             950             1050
      7521 WARD             1250             1350
      7902 FORD             3000             3100
      7369 SMITH             800              900
      7788 SCOTT            3000             3100
      7876 ADAMS            1100             1200
      7934 MILLER           1300             1400
14 rows selected.
SQL>And yeah... your formatted code is this.
cursor c1 is
   SELECT t.upi_nbr upi_nbr,
          f_get_project_id(l.pay_type_code,
                           l.charge_type_nme,
                           l.charge_code) project_id,
          LAST_DAY(TO_DATE(SUBSTR(t.Year_Month, 5, 2)||'/'||'01'||'/'||SUBSTR(t.Year_Month,1,4),
                           'MM/DD/YYYY'))reporting_period_end_date,
          SUM (c.hours_worked_qty) reported_hrs
   from trs.trs_timesheet@oraprod5 T,
        trs.trs_line@oraprod5 L,
        trs.trs_cell@oraprod5 C
where T.upi_nbr=L.upi_nbr
and T.year_month=L.year_month
and L.row_nbr=C.row_nbr
and L.upi_nbr=C.upi_nbr
and L.year_month = C.year_month
and L.invalid_activity_ind = 'V'
and rtrim(L.charge_code) is not null
AND L.Pay_Type_Code<>'REQ'
and C.Hours_Worked_Qty > 0
GROUP BY t.upi_nbr,
         t.year_month,
         t.oui_nbr,
         l.charge_code,
         l.activity_detail_code,
         l.charge_type_nme,
         l.pay_type_code;Cheers
Sarma.