Oracle PLS-00363：表达式''不能用作赋值目标

Question

你好，不知道为什么我得到这个错误。 基本上我在这三行中得到它：

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

过程：

 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。从本质上讲，这些是只读的。您可以将其定义为IN OUT参数或OUT参数。

有关详细信息，请参阅此处： http://plsql-tutorial.com/plsql-passing-parameters-procedure-function.htm

Answer 2

生成新的VARCHAR2类型变量以分配IN（输入）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;