文档解释
ORA-23515: materialized views and/or their indices exist in the tablespace
Cause: An attempt was made to drop a tablespace which contains materialized views and/or their indices.
Action: Drop the materialized views in this tablespace. Also, find indices belonging to materialized views in this tablespace and drop then. Then try dropping the tablespace.
Oracle ORA-23515错误消息：
ORA-23515: materialized views and/or their indices exist in the tablespace
官方解释
ORA-23515表示在指定的表空间中已存在物化视图和/或其索引。这意味着无法在此表空间中创建物化视图，因为它已经有物化视图和其索引了。
常见案例
ORA-23515常常发生在执行物化视图相关的操作（例如创建复制或快速复制）时，但未指定明确的表空间时。
一般处理方法及步骤
为了解决此错误，只需确保将指定的表空间用于此物化视图，以便可以成功地在此表空间中创建物化视图及其索引。
