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ORA-32301: object-relational materialized views must be primary key based ORACLE 报错 故障修复 远程处理

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ORA-32301: object-relational materialized views must be primary key based ORACLE 报错 故障修复 远程处理

文档解释

ORA-32301: object-relational materialized views must be primary key based

Cause: An attempt was made to create an object-relational materialized view that is not primary key based.

Action: Create the materialized view with the PRIMARY KEY keyword.

这个错误是发生在使用ORacle的物化视图时出现的。物化视图(Materialized View)是对特定查询结果的一个已存储的介质表,应用程序可以直接查询这个物化视图,而不必重新执行查询。

此错误意味着这个物化视图必须基于主键,如果它不是基于主键,ORacle将返回一个ORA-32301错误消息。ORA-32301是ORacle异常编号。

官方解释

Oracle文档中ORA-32301的官方定义是“对象-关系物化视图必须基于主键”,因此如果尝试使用非主键基础的物化视图,ORacle将返回ORA-32301错误代码。

常见案例

典型的ORA-32301错误案例是在创建物化视图时,ORacle发现物化视图不是基于主键。 例如,如果尝试创建以下形式的物化视图:

CREATE MATERIALIZED VIEW MVIEW

AS

SELECT Column1, Column2

FROM TABLE1

ORacle将返回ORA-32301错误,因为这个物化视图不是基于主键,即Column1和Column2不是主键。

一般处理方法及步骤

解决这个错误的方法是将物化视图更改为基于主键的视图,如以下示例:

CREATE MATERIALIZED VIEW MVIEW

AS

SELECT Column1, Column2

FROM TABLE1

WHERE PRIMARY_KEY = VALUE

上面的示例物化视图基于主键,即PRIMARY_KEY=VALUE,所以它不会引发ORA-32301错误。还可以考虑使用一些索引,以提高查询性能。

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ORA-32301: object-relational materialized views must be primary key based ORACLE 报错 故障修复 远程处理

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