user authorazation

[leecho@unitem.edu.my]

Hi,
I confuse. I had a role named lsc_role with certain object privs. if i
run this query :
select role from dba_role;

ROLE
-----------------------
JAVADEBUGPRIV
EJBCLIENT
JAVA_ADMIN
JAVA_DEPLOY
CTXAPP
XDBADMIN
AUTHENTICATEDUS ER
LBAC_DBA
OLAP_DBA
SALES_HISTORY_R OLE
LSC_ROLE

i can see the role exists. but when i try to see the object privs
granted to lsc_role with this query :

SQLselect *
2 From role_tab_privs
3 where role = 'LSC_ROLE';

no rows selected


User who granted LSC_ROLE is still working, mean access is restricted
as what was assigned to this role.

Why i can see the object privs assigned to them in second query?

I granted the role lsc_role to user using id: abc who has dba role.

I wonder is that only grantor can see grantees? Hm.. means, id dba_1
created and granted role_a to user b. When dba_2 run tthis query:
SQLselect *
2 From role_tab_privs
3 where role = 'role_a';
dba_2 will see nothing, am I right?

In this case, which userid is better when dba want to create or
granted a role or role; using a his own id or conn as sysdba?

more confuse now!!

thanz.

regard,
lclim