ORA-01733:virtualcolumnnotallowedhere

ORA-01733:virtualcolumnnotallowedhere

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：

无法对包含表达式的view 进行dml 操作