With out loosing view grant access, i can modify the existing vi

Question

I am using oracle 11g.
I would like to add few more where condition in my oracle view ,Which has grant permission by different user.
There is anyway with out loosing view grant access, i can modify the existing view.
Existing view
create view abc
as
select * from tab1
where rownum =1 .
Grant select on abc to read_ro;
Modifying view
There is anyway with out loosing view grant access, i can modify the existing view?
add few more where condition in my oracle view ,Which has grant permission by different user
please advise.

Answer 1

create or replace view...
SQL>  create or replace view y as select object_name from user_objects;
View created.
SQL> grant select on y to ads;
Grant succeeded.
SQL> select * from user_tab_privs where table_name='Y';
GRANTEE                        OWNER
TABLE_NAME                     GRANTOR
PRIVILEGE                                GRA HIE
ADS                            BONTRAB1
Y                              BONTRAB1
SELECT                                   NO  NO
SQL> create or replace view y as select object_name,created from user_objects;
View created.
SQL>  select * from user_tab_privs where table_name='Y';
GRANTEE                        OWNER
TABLE_NAME                     GRANTOR
PRIVILEGE                                GRA HIE
ADS                            BONTRAB1
Y                              BONTRAB1
SELECT                                   NO  NO
SQL> desc y
Name                                      Null?    Type
OBJECT_NAME                                        VARCHAR2(128)
CREATED                                            DATE