涵蓋/隱含權限 (Database Engine)

在 SQL Server 的權限階層中，授與特定權限可能會連帶授與其他權限。高層級的權限可以描述為「涵蓋」它們「隱含」之更詳細、低層級的權限。

dbo.ImplyingPermissions

下列範例指令碼會將安全性實體的類別名稱及權限名稱當作它的引數。它會在權限階層中移動，從指定的節點到根節點：伺服器上的 CONTROL SERVER。此範例會發出一份權限清單，其中隱含地包括了指定的權限。

CREATE FUNCTION dbo.ImplyingPermissions (@class nvarchar(64), 
   @permname nvarchar(64))
RETURNS @ImplPerms table (permname nvarchar(64), 
   class nvarchar(64), height int, rank int)
AS
BEGIN
   WITH 
   class_hierarchy(class_desc, parent_class_desc)
   AS
   (
   SELECT DISTINCT class_desc, parent_class_desc 
      FROM sys.fn_builtin_permissions('')
   ),
   PermT(class_desc, permission_name, covering_permission_name,
      parent_covering_permission_name, parent_class_desc)
   AS
   (
   SELECT class_desc, permission_name, covering_permission_name,
      parent_covering_permission_name, parent_class_desc
      FROM sys.fn_builtin_permissions('')
   ),
   permission_covers(permission_name, class_desc, level,
      inserted_as)
   AS
    (
    SELECT permission_name, class_desc, 0, 0
       FROM PermT
       WHERE permission_name = @permname AND
       class_desc = @class
    UNION ALL
    SELECT covering_permission_name, class_desc, 0, 1
       FROM PermT 
       WHERE class_desc = @class AND 
          permission_name = @permname AND
          len(covering_permission_name) > 0
    UNION ALL
    SELECT PermT.covering_permission_name, 
       PermT.class_desc, permission_covers.level,
       permission_covers.inserted_as + 1
       FROM PermT, permission_covers WHERE
       permission_covers.permission_name =
       PermT.permission_name AND
       permission_covers.class_desc = PermT.class_desc 
       AND len(PermT.covering_permission_name) > 0
    UNION ALL
    SELECT PermT.parent_covering_permission_name,
       PermT.parent_class_desc,
       permission_covers.level + 1,
       permission_covers.inserted_as + 1
       FROM PermT, permission_covers, class_hierarchy
       WHERE permission_covers.permission_name =
       PermT.permission_name AND 
       permission_covers.class_desc = PermT.class_desc
       AND permission_covers.class_desc = class_hierarchy.class_desc
       AND class_hierarchy.parent_class_desc =
       PermT.parent_class_desc AND
       len(PermT.parent_covering_permission_name) > 0
    )
  INSERT @ImplPerms
  SELECT DISTINCT permission_name, class_desc, 
     level, max(inserted_as) AS mia 
     FROM permission_covers
     GROUP BY class_desc, permission_name, level
     ORDER BY level, mia
  RETURN
END

A. 列出結構描述上隱含 ALTER 權限的權限

SELECT * FROM dbo.ImplyingPermissions('schema', 'alter')

B. 列出物件上隱含 VIEW DEFINITION 權限的權限

SELECT * FROM dbo.ImplyingPermissions('object', 'view definition') 

C. 列出路由上隱含 TAKE OWNERSHIP 權限的權限

SELECT * FROM dbo.ImplyingPermissions('route', 'take ownership')

D. 列出 XML 結構描述集合上隱含 EXECUTE 權限的權限

SELECT * FROM dbo.ImplyingPermissions('xml schema collection', 'execute')

請參閱

參考

sys.server_permissions (Transact-SQL)

sys.fn_builtin_permissions (Transact-SQL)

sys.database_permissions (Transact-SQL)

概念

保護 SQL Server 的安全