恢复备份之后所有者就没有了？

IF OBJECT_ID('ChangeAll') IS NOT NULL DROP PROC ChangeAll

         GO 



         CREATE PROCEDURE ChangeAll (

             @old sysname,

             @new sysname

         )

        AS

             DECLARE @objname sysname 



             SET NOCOUNT ON 



             IF USER_ID(@old) IS NULL

                BEGIN

                    RAISERROR ('The @old passed does not exist in the database', 16, 1)

                    RETURN

                END

             IF USER_ID(@new) IS NULL

                BEGIN

                    RAISERROR ('The @new passed does not exist in the database', 16, 1)

                    RETURN

                END 



             DECLARE owner_cursor CURSOR FOR 



             SELECT name FROM sysobjects WHERE uid = USER_ID(@old)

             OPEN owner_cursor

             FETCH NEXT FROM owner_cursor INTO @objname

             WHILE (@@fetch_status <> -1)

                 BEGIN

                     SET @objname = @old + '.' + @objname

                     EXEC sp_changeobjectowner @objname, @new

                     FETCH NEXT FROM owner_cursor INTO @objname

                 END 



            CLOSE owner_cursor

            DEALLOCATE owner_cursor

            GO 



EXEC ChangeAll @old = 'mis', @new = 'dbo'