any other user must have access privilege on the table as well as on the data file to work with the external table.
要使用外部表,任何用户必须对外部表和数据文件拥有访问特权。
tbac considers the actual task when deciding whether an access privilege should be granted or not .
tbac判断是否授予主体访问权限时,要考虑当前执行的任务。
introducing the idea about finely granular access control through inherit attributes of object, decomposes the access privilege from menu to atom control.