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OCI-21601: attribute is not an object

OCI-21601: attribute is not an object
Cause: The user attempts to perform an operation (that is valid only for an object) to an attribute of a built-in type. An example of such an illegal operation is to dynamically set a null structure to an attribute of a built-in type.
Action: User should avoid performing such operation to an attribute of built-in type.

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小智
OCI-21601:属性不是一个对象,
.原因:用户尝试对内置类型的属性执行操作(仅对对象有效)。这种非法操作的示例是动态地将空结构设置为内置类型的属性。,
.操作:用户应避免对内置类型的属性执行此类操作。,
.
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