Question about call statement in trigger

Question

I faced a question in written exam.
A CALL statement inside a trigger allow us to call
a)package
b)procedure
c)function
d)another trigger
Can anyone give me answer with reason?
I used CALL statement inside trigger but not allowing to use it. Might be earlier in oracle CALL statement we can use..its only a guess so I am asking in forum..
plz guide me..
rgds,
pc

Answer 1

You can use CALL in a trigger without resorting to EXECUTE IMMEDIATE
SQL> create table t1 (
  2    col1 number
  3  );
Table created.
SQL> create procedure t1_proc
  2  as
  3  begin
  4    dbms_output.put_line( 'In T1_PROC' );
  5  end;
  6  /
Procedure created.
SQL> ed
Wrote file afiedt.buf
  1  create trigger trg_t1
  2    before insert on t1
  3    for each row
  4* call t1_proc
  5  /
Trigger created.
SQL> set serveroutput on;
SQL> insert into t1 values( 1 );
In T1_PROC
1 row created.I can't think of any reason that you'd actually intentionally structure your code this way in this day and age because it would be rather likely to cause confusion for whoever had to support this in the future. But it is valid syntax that probably made sense back in Oracle 5.
Justin