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ORA-55505: DDL done on an interesting object after mining start SCN ORACLE 报错 故障修复 远程处理

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ORA-55505: DDL done on an interesting object after mining start SCN ORACLE 报错 故障修复 远程处理

文档解释

ORA-55505: DDL done on an interesting object after mining start SCN

Cause: The Flashback Transaction Backout process encountered an interesting object which had its last DDL operation done on it after the mining start time. An interesting object is one that has been modified by either the specified transactions or any of their dependents.

Action: Specify transactions that have committed after the last DDL done on all the objects they touched.

ORA-55505表示一个DDL被在基于SCN的Data Mining过程开始后修改,这个错误代表了由Data Mining过程产生的结果可能受到影响。

在Data Mining过程中,可能会记录一些过程信息,如DDL对象的开始和结束SCN或ORA_ROWSCN,如果这些SCN受到DDL所影响,Data Mining过程就会失败。

官方解释

ORA-55505表示由于某些事件(例如DDL)发生在Data Mining过程开始后,而Data Mining正在从该数据库对象收集信息,导致Data Mining失败。

一般情况下,出现此错误的原因是:Data Mining过程在遇到DDL操作时,会停止并返回此错误。这是因为某些DDL操作(例如更新表结构)可能会更改Data Mining过程正在处理的数据。

常见案例

1、通过Data Pump备份数据后,在继续Data Mining操作时出现此错误。

2、在另一种案例中,用户在Data Mining之前或之中重命名了一个已经存在的表,然后Data Mining操作失败。

一般处理方法及步骤

首先,在Data Mining前以前,应该舍弃任何可能会改变数据库结构的DDL操作。在Data Mining过程中,任何不影响Data Mining的更改应该及时更新到数据库中。

1、备份原始数据

2、分析可能引起此问题的DDL操作

3、确保所有对象都保持原状

4、取消所有未执行完毕的Data Mining

5、在此基础上重新开始Data Mining程序

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① 本站未注明“稿件来源”的信息均来自网络整理。其文字、图片和音视频稿件的所属权归原作者所有。本站收集整理出于非商业性的教育和科研之目的,并不意味着本站赞同其观点或证实其内容的真实性。仅作为临时的测试数据,供内部测试之用。本站并未授权任何人以任何方式主动获取本站任何信息。

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ORA-55505: DDL done on an interesting object after mining start SCN ORACLE 报错 故障修复 远程处理

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