ORA-01466: unable to read data - table definition has changed

今天做基于时间戳的闪回查询，出现了错误：ORA-01466: unable to read data - table definition has changed

官方文档的解释：

ORA-01466: unable to read data - table definition has changed
Cause: Query parsed after tbl (or index) change, and executed w/old snapshot

Action: commit (or rollback) transaction, and re-execute

在网上找到一个

> Solution Description:

> =====================

>

> This is usually caused when some change has been made to the

> initialisation parameter FIXED_DATE or the system date. It can occur

> Under different circumstances.

>

> 1. When doing Date testing and the init.ora parameter FIXED_DATE

> has been set to a future date. When the database is started, then

> that date & TIME does not change.

>

> So any objects created will have exactly the same Date & Time

> stamp as the FIXED_DATE.

>

> Now When you come to run the EXPORT, it checks the SYSDATE

> and the creation dates for the objects.

>

> You need to modify the TIME in the FIXED_DATE parameter,

> i.e. add 1 hour or few minutes, etc and you will not

> encounter the error ORA-1466 anymore.

>

> 2. The Operating System was reinstalled because of the server crash.

> The system date was not set correctly. The year was set to 2001

> instead of 1997 when they reinstalled Oracle. After some DB

> activity

> they realized the date was incorrect and reset it to 1997 causing

> some

> objects to exist with future dates.

>

> Perform full database export without specifying consistent=y and

> recreate the database.- Òþ²Ø±»ÒýÓÃÎÄ×Ö -

引用自：http://www.orafaq.com/usenet/comp.databases.oracle.server/2007/03/31/1586.htm



解决方法：指定一下会话的时间格式，重新执行即可。

10:26:02 TYGER@ORCL>alter session set nls_date_format='yyyy-mm-dd hh24:mi:ss';

Session altered.

10:26:30 TYGER@ORCL>select sysdate from dual;

SYSDATE

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

2014-03-14 10:26:38

10:27:12 TYGER@ORCL>select * from fb_tyger as of timestamp to_timestamp('2014-03-14 10:26:38','yyyy-mm-dd hh24:mi:ss');

DEPTNO DNAME LOC

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10 ACCOUNTING NEW YORK

20 RESEARCH DALLAS

30 SALES CHICAGO

40 OPERATIONS BOSTON