无法授予，拒绝或撤消对sa，dbo，实体所有者，information_schema，sys或您自己的权限

我遇到以下错误：

Cannot grant, deny, or revoke permissions to sa, dbo, entity owner, information_schema, sys, or yourself.

当我尝试这些命令时

USE ASPState
GO

GRANT EXECUTE ON CreateTempTables TO [R2Server\AAOUser]
GO
GRANT EXECUTE ON DeleteExpiredSessions TO [R2Server\AAOUser]
GO
GRANT EXECUTE ON GetMajorVersion TO [R2Server\AAOUser]
GO
GRANT EXECUTE ON GetHashCode TO [R2Server\AAOUser]
GO
GRANT EXECUTE ON TempGetAppID TO [R2Server\AAOUser]
GO
GRANT EXECUTE ON TempGetStateItem TO [R2Server\AAOUser]
GO
GRANT EXECUTE ON TempGetStateItem2 TO [R2Server\AAOUser]
GO
GRANT EXECUTE ON TempGetStateItem3 TO [R2Server\AAOUser]
GO
GRANT EXECUTE ON TempGetStateItemExclusive TO [R2Server\AAOUser]
GO
GRANT EXECUTE ON TempGetStateItemExclusive2 TO [R2Server\AAOUser]
GO
GRANT EXECUTE ON TempGetStateItemExclusive3 TO [R2Server\AAOUser]
GO
GRANT EXECUTE ON TempGetVersion TO [R2Server\AAOUser]
GO
GRANT EXECUTE ON TempInsertStateItemLong TO [R2Server\AAOUser]
GO
GRANT EXECUTE ON TempInsertStateItemShort TO [R2Server\AAOUser]
GO
GRANT EXECUTE ON TempInsertUninitializedItem TO [R2Server\AAOUser]
GO
GRANT EXECUTE ON TempReleaseStateItemExclusive TO [R2Server\AAOUser]
GO
GRANT EXECUTE ON TempRemoveStateItem TO [R2Server\AAOUser]
GO
GRANT EXECUTE ON TempResetTimeout TO [R2Server\AAOUser]
GO
GRANT EXECUTE ON TempUpdateStateItemLong TO [R2Server\AAOUser]
GO
GRANT EXECUTE ON TempUpdateStateItemLongNullShort TO [R2Server\AAOUser]
GO
GRANT EXECUTE ON TempUpdateStateItemShort TO [R2Server\AAOUser]
GO
GRANT EXECUTE ON TempUpdateStateItemShortNullLong TO [R2Server\AAOUser]
GO

因此，我如何知道我的帐户R2Server\AAOUser对数据库具有哪种类型的权限ASPState？以及解决该错误的方法是什么（以便我可以将这些权限授予我的帐户）？

根据注释，如果您已经是该数据库的数据库所有者，则无需为该数据库授予任何权限。

现在，为了找出您拥有哪些特定权限，可以使用以下查询：

• 查找对特定数据库的权限：

  USE AdventureWorks2008R2;
  SELECT * FROM fn_my_permissions (NULL, 'DATABASE');
  GO
  

• 在所有服务器上查找权限：

  SELECT * FROM fn_my_permissions(NULL, 'SERVER');
  GO
  

在此处查看其他信息：在MSDN论坛上查找SQL Server登录名和关联的服务器角色。