ORA-01733: virtual column not allowed here

基表： hr.tt  scott.tt

 视图1： 基于 hr.tt  union all  scott.tt ---》 scott.ttt

 视图2： 基于 视图1-》scott.ttt 创建 system.tt





问题再现：

SQL> create table hr.tt (a number);

Table created.

SQL>  create table lixora.tt (a number);

Table created.



SQL> create view  scott.tt as select * from  hr.tt union all select * from lixora.tt;

View created.





SQL> create view system.tt as select * from scott.tt;

View created.



SQL> select * from system.tt

         A

----------

         1



更新视图2：

SQL> update  system.tt set a=2;

update  system.tt set a=2

                      *

ERROR at line 1:

ORA-01733: virtual column not allowed here







更新视图1：

SQL> update  scott.tt set A=2;

update  scott.tt set A=2

              *

ERROR at line 1:

ORA-01732: data manipulation operation not legal on this view





SQL> !oerr ora 1732

ORA-01733: virtual column not allowed here 

Cause: An attempt was made to use an INSERT, UPDATE, or DELETE statement on an expression in a view. 

Action: INSERT, UPDATE, or DELETE data in the base tables, instead of the view.

总结：

无法对包括表达式的view 进行dml 操作