ORA-25456: rule set was modified or evaluation terminated for iterator: string

文档解释

ORA-25456: rule set was modified or evaluation terminated for iterator: string

Cause: An attempt to get rule hits was made, which failed because the underlying rule set was modified after the iterator was returned.

Action: Try again after re-evaluating the rule set.

ORA-25456触发此错误则意味着一个迭代器规则集被更改或者某个迭代器的评估已被终止，提示的string参数则提供了更多的信息，有助于理解错误之源。

一般处理方法及步骤

1、首先定位哪个iterator规则集被更改或者终止。

2、深入分析一下新更改的内容，寻找导致到iterator而导致性能瓶颈的原因。

3、根据这个分析结果，更正或者重新设置iterator规则集，并计划在指定的情况下可以重复，并有效地让性能不受影响。

4、最后验证iterator状态是否恢复，性能是否改善，若还不满意，重复执行上述步骤。