OCP 1Z0 053 25

25.You enabled Flashback Data Archive on the INVENTORY table. Which DDL operation is supported on

the table after enabling Flashback Data Archive?

A. Drop the table.

B. Partition the table

C. Truncate the table.

D. Add a column to the table.

E. Rename a column in the table.

Answer: D

http://docs.oracle.com/cd/B28359_01/appdev.111/b28424/adfns_flashback.htm#BJFJHDAG

DDL Statements Not Allowed on Tables Enabled for Flashback Data Archive

Using any of the following DDL statements on a table enabled for Flashback Data Archive causes error ORA-55610:

ALTER

TABLE

statement that does any of the following:

Drops, renames, or modifies a column

Performs partition or subpartition operations

Converts a

LONG

column to a LOB column

Includes an

UPGRADE

TABLE

clause, with or without an

INCLUDING

DATA

clause

DROP

TABLE

statement

RENAME

TABLE

statement

TRUNCATE

TABLE

statement

不知是否新版本有改进，测试结果不一样

版本

SQL> select * from v$version where rownum <=1;
BANNER
--------------------------------------------------------------------------------
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - Production
1 row selected

SQL> CREATE TABLE employee (EMPNO NUMBER(4) NOT NULL, ENAME VARCHAR2(10),
2    JOB VARCHAR2(9), MGR NUMBER(4)) FLASHBACK ARCHIVE;
Table created

SQL> insert into employee(empno) values(11);
1 row inserted

SQL> commit;
Commit complete

SQL> select systimestamp from dual;
SYSTIMESTAMP
--------------------------------------------------------------------------------
30-JUN-14 08.10.33.031000 PM +08:00
1 row selected

新增字段

SQL> alter table employee add new_col number;
Table altered

SQL> delete from employee;
1 row deleted

SQL> commit;
Commit complete

SQL> SELECT empno FROM employee
2  AS OF TIMESTAMP TO_TIMESTAMP('2014-6-30 20:10.33', 'YYYY-MM-DD HH24:MI:SS');
EMPNO
-----
11
1 row selected

删除字段

SQL> alter table employee drop column new_col;
Table altered

SQL>
SQL> SELECT empno FROM employee
2  AS OF TIMESTAMP TO_TIMESTAMP('2014-6-30 20:10.33', 'YYYY-MM-DD HH24:MI:SS');
EMPNO
-----
11
1 row selected

truncate

SQL> truncate table employee;
Table truncated

SQL>
SQL> SELECT empno FROM employee
2  AS OF TIMESTAMP TO_TIMESTAMP('2014-6-30 20:10.33', 'YYYY-MM-DD HH24:MI:SS');
EMPNO
-----
11
1 row selected

rename column

SQL> alter table employee rename column empno to empno2;
Table altered

SQL> SELECT empno2 FROM employee
2  AS OF TIMESTAMP TO_TIMESTAMP('2014-6-30 20:10.33', 'YYYY-MM-DD HH24:MI:SS');
EMPNO2
------
11
1 row selected

rename table

SQL> alter table employee rename to emp3;
Table altered

SQL>
SQL> SELECT empno2 FROM emp3
2  AS OF TIMESTAMP TO_TIMESTAMP('2014-6-30 20:10.33', 'YYYY-MM-DD HH24:MI:SS');
EMPNO2
------
11
1 row selected