Function inside a trigger

Question

Can i write function inside a trigger?
My requirement is that i've to call a function inside a trigger. Since this function is not frequently used so what i am thinking that i should write this function inside trigger. Can i do that?
i know that function can be called inside trigger, but can i create a function inside trigger?
if yes, then how?
give me an overview. I'll appricate any kind of help.

Answer 1

Hi,
jadoo wrote:
you mean to say that i can create a function in declaration section of trigger?Just an example,
SQL> select empno,sal, deptno
  2  from emp
  3  where empno=7369;
     EMPNO        SAL     DEPTNO
      7369        800         20
SQL> create table sal_inc_tab
  2  (inc_empno number,
  3  inc_sal number);
Table created.
SQL> create or replace trigger f_trg After update on emp
  2  REFERENCING NEW AS NEW OLD AS OLD
  3  FOR EACH ROW
  4  Declare
  5   v_inc_sal number;
  6   function sal_inc (v_sal number)
  7   return number as
  8   Begin
  9    return :new.sal+3000;
10   end sal_inc;
11  BEGIN
12   v_inc_sal:=sal_inc(:new.sal);
13   Insert into sal_inc_tab values(:new.empno,v_inc_sal);
14  end;
15  /
Trigger created.
SQL> select * from sal_inc_tab;
no rows selected
SQL> update emp
  2  set deptno=10
  3  where empno=7369;
1 row updated.
SQL> select * from sal_inc_tab;
INC_EMPNO    INC_SAL
      7369       3800You can do same thing without function. Here there was no specific logic as such, it was just to show you how this is executed.
Twinkle