sql - ORA-00984 在 PL/SQL 过程中不允许列

Question

create or replace procedure pro_enroll(sname_in IN varchar, cname_in IN varchar)
as
sno STUDENT.snum%type;
begin
    SELECT snum INTO sno FROM STUDENT WHERE sname=sname_in;
    --dbms_output.put_line(sno || chr(9) || sname_in || chr(9) || cname_in);
    INSERT INTO ENROLLED(snum, cname) VALUES(sno, c_name_in);
end pro_enroll;
/

SELECT * FROM ENROLLED;

begin
pro_enroll('M.Lee', 'CS448');
pro_enroll('A.Smith', 'ENG320');
end;
/

SELECT * FROM ENROLLED;

为什么我会收到“此处不允许使用 ORA-00984 列”？在已注册：

CREATE TABLE ENROLLED
(
snum INTEGER NOT NULL,
cname VARCHAR(30) NOT NULL,
PRIMARY KEY (snum, cname),
FOREIGN KEY (snum) REFERENCES STUDENT(snum),
FOREIGN KEY (cname) REFERENCES CLASS(cname) 
);

Answer 1

您在 中使用c_name_in了参数名称INSERT，但是，您的过程参数的实际名称是cname_in，没有 and 之间的符号_，这是有效的：cname

create or replace procedure pro_enroll(sname_in IN varchar, cname_in IN varchar)
as
sno STUDENT.snum%type;
begin
    SELECT snum INTO sno FROM STUDENT WHERE sname=sname_in;
    --dbms_output.put_line(sno || chr(9) || sname_in || chr(9) || cname_in);
    INSERT INTO ENROLLED(snum, cname) VALUES(sno, cname_in);
end pro_enroll;
/