为什么我在调用此过程时会出错？

问题描述

我有一个名为 student_id 的过程

 procedure student_id ( v_surname  in varchar2,v_name in varchar2,v_date_birth in varchar2,v_gender in varchar2,v_state in varchar2)  is l_student_id varchar2;
 begin
 l_student_id :=  par_surname(v_surname)       ||'-'||
                  par_name(v_name)             ||'-'||
                  par_date_birht(v_date_birth) ||'-'||
                  par_gender(v_gender)         ||'-'||
                  par_state(v_state);
 dbms_output.put_line('Student ID :  ' ||  l_student_id);
end student_id;

在我写入值后我的预期输出应该是什么：

（学生 ID：JOHN-SMITH-170692-M-CALIFORNIA）

我得到的错误：

Error with beginning of line: 291  in the command -
procedure cod_fiscale ( v_surname  in varchar2,Report error -
unkNown command   

Error with beginning of line : 292 in the command -
                        v_name  in varchar2,Report error -
unkNown command  

Error with beginning of line : 293 in the command -
                        v_date_birth  in varchar2,Report error -
unkNown command    

Error with beginning of line : 294 in the command -
                        v_gender  in varchar2,Report error -
unkNown command    

SP2-0044:to get the list of kNown commands,enter HELP
and enter EXIT to exit.
Error with beginning of line : 295 in the command -
                        v_state  in varchar2) is l_student_id varchar2;
Report error -
unkNown command    

Error with beginning of line : 296 in the command -
begin
 l_student_id :=  par_surname(v_surname)       ||'-'||
                  par_name(v_name)             ||'-'||
                  par_date_birht(v_date_birth) ||'-'||
                  par_gender(v_gender)         ||'-'||
                  par_state(v_state);
 dbms_output.put_line('Student ID :  ' ||  l_student_id);
end student_id;
Report error -
ORA-06550: line 9,column 25:
pls-00103: Found symbol   "" 
06550. 00000 -  "line %s,column %s:\n%s"
*Cause:    Usually a PL/sql compilation error.
*Action:

我粗略地翻译了我得到的错误，因为它是另一种语言。

*注意：这不是一个独立的过程，此代码与我之前的问题有关。

发现于：How to write a PL/SQL procedure with x input parameters and input/ouput of x parameters combined*

我的错误是什么？错误的原因是什么？

解决方法

在没有看到您包裹的其余部分的情况下，我可以发现一个问题：

procedure student_id ( v_surname  in varchar2,v_name in varchar2,v_date_birth in varchar2,v_gender in varchar2,v_state in varchar2)  is
  l_student_id varchar2; -- you need to declare the length of your variable
begin
  ...

您已经声明了变量的类型，但没有说明需要多长时间。它应该是这样的：

l_student_id varchar2(400);

尽管您应该将 400 更改为将存储在该变量中的值的预期最大长度的正确值。