How to view/verify a procedure result?

Question

Can someone explain how to see the results of a procedure, everything is working fine and the code is valid, executed and compiled with no errors. Now how can I see the results as Query or anything.

The ex procedure is about sum of salary.

CREATE OR REPLACE PROCEDURE HR.TOTAL_SALARY AS    
   total_salary NUMBER(12,2);    
BEGIN    

  SET TRANSACTION READ ONLY;    

  SELECT SUM (salary) 
    INTO total_salary 
    FROM employees;    

  DBMS_OUTPUT.PUT_LINE('Total salary 1: ' || total_salary);     
  COMMIT;    

END; 

Answer 1

To output the results of a select statement in a procedure you need to use a cursor.

create procedure myproc 
(in_variable IN number, out_records OUT sys_refcursor)
as
begin
open out_records for

select * from mytable
where column = in_variable;

end;

then to use it, declare the cursor, execute the proc, and output the results.

variable records refcursor;
exec myproc(1, :records);
print :records;

(no promises that the above is syntactically perfect - I'm away from the DB right now. But it should be close enough to get you in the right direction.)

Oh - and you can use a user-defined cursor type inside of a package, if that is appropriate for your environment.

Answer 2

Are you running this in SQL*Plus? Have you "set serveroutput on;"?

Answer 3

I recommend for this a function

CREATE OR REPLACE FUNCTION HR.TOTAL_SALARY return number AS    
   total_salary NUMBER(12,2);    
BEGIN    

  SELECT SUM (salary) 
    INTO total_salary 
    FROM employees;    

return total_salary;

END; 

The usage for this is like:

select hr.TOTAL_SALARY() as total_sal from dual.