ORA-29973: Unsupported query or operation during change notification registration

文档解释

ORA-29973: Unsupported query or operation during change notification registration

Cause: The user attempted to register an unsupported query type or an unsupported operation like a DML/DDL for change notification.

Action: Please check the statement being executed and refer to the documentation.

ORA-29973: Unsupported query or operation during change notification registration指的是在注册变更通知时发生了不支持的查询或操作。

常见案例

（1）使用DBMS_CHANGE_NOTIFICATION包时没有启用通知；

（2）查询条件太多，无法在特定时间内有效地执行；

（3）使用BIND_LOB字段发出查询通知时，参数LOB_LEN与LOB_IDX可能不正确。

有了这个错误，应该按照以下步骤解决：

（1）检查通知是否启用；

（2）确定查询条件，以快速而有效地执行；

（3）确保带注册的BIND_LOB字段的参数LOB_LEN及LOB_IDX正确。