Question

是PL SQL的新手，如何在调用过程时解决pls-00306错误的参数数量？

CREATE OR REPLACE PROCEDURE overtime (
 Normal_Hours NUMBER ,
 Hours_worked NUMBER ,
 message VARCHAR2 ,
 Overtime IN OUT NUMBER )

AS  

 Begin
     DBMS_OUTPUT.PUT_LINE('ENTER HOURS WORKED' || &hours_worked);
     IF hours_worked <=Normal_Hours  THEN
      DBMS_OUTPUT.PUT_LINE('NO OVETIME WORKED');
 ELSE
     BEGIN
        Overtime := Hours_worked - Normal_Hours;
        DBMS_OUTPUT.PUT_LINE('You have worked' || Overtime );
      END;
      END IF;
 END;
 /

Answer 1

错误...使用正确的参数数量和类型调用过程？ E.g。

declare
  v_overtime number;
begin
  overtime(
    normal_hours => 8
   ,hours_worked => 12
   ,message      => 'clever message'
   ,overtime     => v_overtime
  );
  dbms_output.put_line(v_overtime);
end;
/

请注意，因为第四个参数的传递模式是in out，所以你需要将它绑定到一个变量中 - 一个常数不会发生。

Answer 2

创建过程或函数时，声明的参数在调用过程或函数时应该是一致的。

CREATE OR REPLACE PROCEDURE overtime (
Normal_Hours NUMBER ,
Hours_worked NUMBER ,
message VARCHAR2 ,
Overtime IN OUT NUMBER )

由于您在过程中声明了4个参数，因此规则是在调用过程时，还应该传递4个变量/值。

declare
out_overtime number; -- this is the variable that will catch the value passed by the procedure

begin
overtime(8,9,'One Hour overtime', out_overtime);
dbms_output.put_line('Total overtime is '||out_overtime||' hours');
end;

pls-00306调用过程时参数的数量或类型错误

2 个答案: