PLS-00201：必须声明标识符“ SALARY”

Question

This is my procedure:

create or replace procedure emp_lookup
 (empno   IN  emp55.empno%TYPE,
  salary  OUT emp55.sal%TYPE,
  empname OUT emp55.ename%TYPE)
is
begin 
  select sal , ename INTO salary, empname
  from   emp55 
  where  empno=empno;

EXCEPTION WHEN NO_DATA_FOUND THEN empname:='null';
  salary:=-1;
END;

This is the calling code:

SET SERVEROUTPUT ON

DECLARE 
  employee_name emp55.ename%TYPE;
  employee_salary emp55.sal%TYPE;
BEGIN
  emp_lookup (3244,salary,empname);
END;
/

It gives this error when executed:

Error starting at line : 3 in command -
DECLARE 
  employee_name emp55.ename%TYPE;
  employee_salary emp55.sal%TYPE;
BEGIN
  emp_lookup (3244,salary,empname);

END;

Error report -
ORA-06550: line 5, column 20:
PLS-00201: identifier 'SALARY' must be declared
ORA-06550: line 5, column 1:
PL/SQL: Statement ignored

It runs successfully but when I execute it

execute emp_lookup (3346, salary, empname);

shows this error:

Error starting at line : 16 in command -
BEGIN emp_lookup (3346, salary, empname); END;
Error report -
ORA-06550: line 1, column 27:
PLS-00201: identifier 'SALARY' must be declared
ORA-06550: line 1, column 54:
PL/SQL: Statement ignored

Answer 1

you could use bind variables to pass as OUT parameters while calling.

VARIABLE sal NUMBER
VARIABLE name VARCHAR2(20)
execute emp_lookup (3346, :sal, :name)

If you are calling the procedure from within a PL/SQL block, you should have the OUT variables declared appropriately before calling.

DECLARE
salary emp55.sal%TYPE;
empname emp55.ename%TYPE;
BEGIN
   emp_lookup (3346, salary, empname);
END;
/

Answer 2

var salary number
var empname varchar2(10)
create or replace procedure emp_lookup
(no IN emp55.empno%TYPE,
salary OUT emp55.sal%TYPE,
empname OUT emp55.ename%TYPE)
IS
begin
select sal , ename INTO salary, empname
from emp55
where empno=no;

EXCEPTION WHEN NO_DATA_FOUND THEN empname:='null';
salary:=-1;

execute emp_lookup (3346, :salary,:empname);
print salary

Answer 3

First correct your procedure code (change the name of the input variable)

This correction is needed because your where clause ( where empno=empno; ) is always true , so every row of the table will be returned - which is clearly not your initial intention.

create or replace procedure emp_lookup
(in_empno IN emp55.empno%TYPE,
 salary OUT emp55.sal%TYPE,
 empname OUT emp55.ename%TYPE)
IS 
begin 
select sal , ename INTO salary, empname
from emp55 
where empno=in_empno;

EXCEPTION WHEN NO_DATA_FOUND THEN empname:='null';
salary:=-1;

END;

Secod run as follows:

DECLARE 
  employee_name emp55.ename%TYPE;
  employee_salary emp55.sal%TYPE;
BEGIN
  emp_lookup (3244,employee_salary ,employee_name);
  dbms_output.put_line(employee_name   || ' ' || employee_salary);
END;

Answer 4

You have to declare what 'salary' is: ie

SET SERVEROUTPUT ON
DECLARE 
  empname emp55.ename%TYPE;
  salary emp55.sal%TYPE;
BEGIN
  emp_lookup (3244,salary,empname);
END;
/

else,

SET SERVEROUTPUT ON
DECLARE 
  employee_name emp55.ename%TYPE;
  employee_salary emp55.sal%TYPE;
BEGIN
  emp_lookup (3244,employee_salary ,employee_name );
END;
/

I reckon, any of the above solutions would resolve your issue.