use of bind variable

Question

Can we use a bind variable in oracle inside a procedure or function ?

I\'m trying to update a bind variable inside my procedure. Can I do so in any case?

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Answer 1

You can't bind a sqlplus variable in a session to a function/procedure. It will give you error of "Bad bind variable". You can actually just pass bind variable from your oracle session to any procedure.

Let's see a example

    variable v1 NUMBER;

    begin
       select salary into :v1 from employees where employee_id = 100;
       dbms_output.put_line(:v1);
   end;
   /

And if you run the above example by enclosing in procedure/function it will show you error.

   create or replace procedure proc is
   begin
      select salary into :v1 from employees where employee_id = 100;
      dbms_output.put_line(:v1);
   end;
   /

Error -

PROCEDURE proc compiled
Warning: execution completed with warning
3/20           PLS-00049: bad bind variable 'V1'
4/22           PLS-00049: bad bind variable 'V1'

Thus, it is not possible to use session-level bind variables in procedures/functions. In below example t2 is a bind variable

create or replace procedure proc is
    t2 NUMBER;
    begin
       select salary into t2 from employees where employee_id = 100;
       dbms_output.put_line(t2);
    end;
    /

You can call this procedure from sqlplus as

exec proc;