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ORA-55494: input model set may only have a unique VPD policy ORACLE 报错 故障修复 远程处理

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ORA-55494: input model set may only have a unique VPD policy ORACLE 报错 故障修复 远程处理

文档解释

ORA-55494: input model set may only have a unique VPD policy

Cause: An attempt was made to execute a multi-model query where the models, as a set, did not have a unique Oracle Virtual Private Database (VPD) policy.

Action: Correct the input and try again.

ORA-55494错误是Oracle数据库中用于表示违反视图VPD(虚拟私有数据库)策略的错误。

这种错误通常是在执行诸如更新,删除或插入等动态SQL语句时显示的,而这些语句涉及多个表或视图中包含相同VPD策略并引用该VPD策略的列,而模型设置中必须具有唯一的VPD策略。

官方解释

常见案例

案例1:在数据库中执行带有视图VPD(虚拟私有数据库)策略的插入操作时,可能会遇到ORA-55494错误。

案例2:在数据库中使用多表或多视图,并将相同VPD策略应用于这些表或视图时,可能会遇到ORA-55494错误。

一般处理方法及步骤

1、检查是否使用多张表或视图引用相同的VPD策略,如果是,则添加不同的VPD策略,并将其应用于多表。

2、确保模型设置中有唯一的VPD策略,重新创建视图VPD策略。

3、如果初始化参数“_optimizer_view_merging”,则检查它是否为9.2.0.8或更高版本,以避免此错误。

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ORA-55494: input model set may only have a unique VPD policy ORACLE 报错 故障修复 远程处理

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