This callback is given the object being accessed, the name of the property being accessed, the type of access (read, write, or delete for example) and returns whether or not to allow access.

被访问的对象、被访问的属性名、访问的类型（例如读、写和删除）将被传递给回调函数，回调函数会返回是否允许访问。

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If you need to have write access to the database available while column data type is changed, you can use of ADMIN_MOVE_TABLE routine described in the next section.

如果需要在修改列数据类型期间对数据库执行写访问，可以使用下一小节描述的ADMIN_MOVE_TABLE例程。

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The type of database access, such as read or write, will be determined based on the nature of the bank teller function.

数据库访问的类型（比如读或写）将根据银行出纳功能的性质决定。

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