甲骨文PLS-00363：表达式“”不能作为分配对象

Question

你好不知道为什么林收到这个错误。 基本上我把它在这三条线：

PLS-00363: expression 'p_temp_foo.editable.modified_by' cannot be used as an assignment target 
PLS-00363: expression 'p_temp_foo.editable.date' cannot be used as an assignment target 
PLS-00363: expression 'p_temp_foo.editable.modified_by' cannot be used as an assignment target 

程序：

PROCEDURE run_temp_procedure (p_temp_foo IN part_bean, p_member_number IN NUMBER) 
IS 
t_temp_foo part_bean; 
    now DATE; 
    BEGIN 
    now := SYSDATE; 

      p_temp_foo.editable:= t_temp_foo.editable; 
     p_temp_foo.editable.date := SYSDATE; 
     p_temp_foo.editable.modified_by := p_member_number; 


    END run_temp_procedure ; 

Answer 1

p_temp_foo是IN参数。本质上来说，这些是只读的。你可以把它定义为一个IN OUT参数，或OUT参数。

欲了解更多信息请看这里： http://plsql-tutorial.com/plsql-passing-parameters-procedure-function.htm

Answer 2

生成新的VARCHAR2类型变量分配你的IN（输入）的字符串。

procedure sp_name(
ps_list    IN VARCHAR2, 
... 
other IN's and OUT's 
... 
) 
as 

ps_list_copy   VARCHAR2 (32000); 

begin 
ps_list_copy := ps_list; 
... 
do your works with ps_list_copy 
... 
... 
Exception when others then 
.... 
end sp_name;