ORA-19654: must use backup control file to switch file incarnations ORACLE 报错 故障修复 远程处理

文档解释

ORA-19654: must use backup control file to switch file incarnations

Cause: This SWITCHTOCOPY operation is attempting to switch incarnations of a datafile, but the currently mounted control file is not a backup control file.

Action: Restore and mount a backup control file.

Ora-19654: 操作时出现这个错误。这是一个Oracle数据库报错,提示必须使用备份控制文件来切换文件incarnations。

官方解释

Ora-19654 is encountered when a file of an Oracle Database is not in the controlfile and hence requires a change of incarnation.

A file change may happen when someone changes a file name, alters a fileattribute or moves a file. To correctly track such file changes within the Oracle Database, Oracle Database always keeps a recordof files’ incarnations within the controlfile. Without this information Oracle Database will not be able to perform recovery correctly if at the same time the redo logfiles contain references to the current incarnation of the files.

常见案例

Oracle ORA-19654错误常见于删除文件时,因为当文件被删除时,系统操作继续将索引和行记录写入日志文件,但表内容将保存在备份控制文件中。

一般处理方法及步骤

1.检查控制文件,以确认文件状态:通过查看V$FILESTAT表,验证文件是否新增或删除。

2.备份控制文件,以防异常情况发生:使用 alter database backup control file to 来执行控制文件备份。

3.使用另一种方式重新切换文件:重命名旧文件并使用 alter database rename to 将系统中的文件关联到表中。

4.重新创建表:将旧文件名恢复并将其添加到相应的表中。

5.使用 alter database open resetlogs将数据库打开重置日志。

6.检查文件内容,确定更改后的文件恢复正确。


数据运维技术 » ORA-19654: must use backup control file to switch file incarnations ORACLE 报错 故障修复 远程处理