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ORA-39818: index string.string partition string was ignored due to: ORACLE 报错 故障修复 远程处理

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ORA-39818: index string.string partition string was ignored due to: ORACLE 报错 故障修复 远程处理

文档解释

ORA-39818: index string.string partition string was ignored due to:

Cause: Index was unusable at the start of the load and it was requested that unusable indexes be skipped.

Action: No action required.

ORA-39818错误指的是Oracle在一个DML操作期间,一个索引已经被忽略掉了,从而造成了特定的索引不可用,或者是在查询执行时,Oracle没有使用特定的索引。

官方解释

常见案例

1.当执行一个聚合函数的查询时,索引不可用,这是因为索引中的游标不能被聚合查询使用。

2.索引不能作为多表关联的搜索方式,因为可能会存在复杂性。

3.索引不可用,因为表中存在过大的数据。

一般处理方法及步骤

1.确认问题并确定原因,检查数据库中的游标是否已经过时。

2.如果存在过多的数据,可以尝试缩小过多的数据的范围。

3.如果索引可以用于多表关联,则可以尝试使用它来提高查询性能。

4.重建索引以更新游标,如果索引已经过时。

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ORA-39818: index string.string partition string was ignored due to: ORACLE 报错 故障修复 远程处理

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