Oracle PL/SQL之DDL导致的隐式提交

 

1. 如果DDL语法正确,即使执行失败,也会导致隐式提交:

duzz$scott@orcl>create table t1 as select * from dept;

 

Table created.

 

Elapsed: 00:00:00.03

duzz$scott@orcl>update t1 set loc='xx' where deptno=10;

 

1 row updated.

 

Elapsed: 00:00:00.03

duzz$scott@orcl>drop table xx;

drop table xx

           *

ERROR at line 1:

ORA-00942: table or view does not exist

 

 

Elapsed: 00:00:00.01

 

+++++++++++++++++++++++++++++++++++++++++++++++++++++

 

duzz$sys@orcl>select * from scott.t1;

 

    DEPTNO DNAME                                      LOC

---------- ------------------------------------------ ---------------------------------------

        10 ACCOUNTING                                 xx

        20 RESEARCH                                   DALLAS

        30 SALES                                      CHICAGO

        40 OPERATIONS                                 BOSTON

 

Elapsed: 00:00:00.01

 

 

2. 如果DDL语法错误,则不会导致隐式提交,亦不会自动回滚事务:

 

duzz$scott@orcl>update t1 set loc='yy' where deptno=20;

 

1 row updated.

 

Elapsed: 00:00:00.00

duzz$scott@orcl>drop table col xx;

drop table col xx

               *

ERROR at line 1:

ORA-00933: SQL command not properly ended

 

 

Elapsed: 00:00:00.00

 

+++++++++++++++++++++++++++++++++++++++++++++++++++++

 

duzz$sys@orcl>select * from scott.t1;

 

    DEPTNO DNAME                                      LOC

---------- ------------------------------------------ ---------------------------------------

        10 ACCOUNTING                                 xx

        20 RESEARCH                                   DALLAS

        30 SALES                                      CHICAGO

        40 OPERATIONS                                 BOSTON

 

Elapsed: 00:00:00.00

 

总结:

DDL伪代码:

Begin

Parse DDL;

Commit;

Do DDL;

Exception

When others then

Null;

End;

 

Ref:

http://www.cublog.cn/u/25770/showart_2222436.html

posted @ 2011-07-31 01:19  生活不是用来挥霍的  阅读(405)  评论(0编辑  收藏  举报