Call stored procedure from sqlplus

Question

How to call a stored procedure from sqlplus?

I have a procedure:

Create or replace procedure testproc(parameter1 in varachar2,parameter2 out varchar2)
begin

Do something

end;

I tried exec testproc(12,89) ::Returns error

Solution

The second parameter of your procedure is an OUT parameter -- its value will be assigned to the variable passed when the procedure completes. So you can't use a literal value for this parameter.

You can declare a bind variable at the SQLPlus prompt and use that:

-- Declare bind variable
VARIABLE x NUMBER

-- If necessary, initialize the value of x; in your example this should be unnecessary
-- since the value of the second parameter is never read
EXEC :x := 1

-- Call the procedure
EXEC testproc(12, :x)

-- Print the value assigned to the bind variable
PRINT x

Alternatively, you can use an anonymous PL/SQL block:

-- Activate client processing of dbms_output buffer
SET SERVEROUTPUT ON

-- In anonymous block, declare variable, call procedure, print resulting value
DECLARE
  x NUMBER;
BEGIN
  testproc(12, x);
  dbms_output.put_line( x );
END;
/