type of object in dba_tab_privs

>>in Order to create a dynmic query I need to tdentify <table_name> is a view or a table

Why?  Oracle really doens't care about this when querying.

I would join to DBA_OBJECTS to determine what type of object it is.  I don't think you need to go into the X$ tables to figure that out.

like rest have said!! Just join the views.  Why do you need X$ tables?  What exactly is the information you looking for?

If you have DBA role then you can query dba_tab_privs and dba_tables and dba_objects or dba_segments (and join them all on table_name) to get the relevant information.

I want to construct like
grant select on viename dba_tab_privs. table_name to role_vu_1
grant select on table_name dba_tab_privs. table_name  to role_tab_2

etc

Not sure why you want two different roles but OK, it's your system.

Join to dba_objects mentioned above.

Not even sure why you need to join to dba_tab_privs but I'm sure you have a reason...

Thanks for all your comments and a useful script. I am going to apply your comments and scripts

I was actually reverse engineering  the set of privs from source system and apply to target system when creating accounts and roles

BTW

select ue.name, u.name, o.name, ur.name, tpm.name,o.type#,
       decode(mod(oa.option$,2), 1, 'YES', 'NO'),
       decode(bitand(oa.option$,2), 2, 'YES', 'NO')
from sys.objauth$ oa, sys.obj$ o, sys.user$ u, sys.user$ ur, sys.user$ ue,
     table_privilege_map tpm
where oa.obj# = o.obj#
  and oa.grantor# = ur.user#
  and oa.grantee# = ue.user#
  and oa.col# is null
  and oa.privilege# = tpm.privilege
  and u.user# = o.owner#

in thie query type# is 2 for table and 4 for views

You are definitely reinventing the wheel.

You can go into $ORACLE_HOME/rdbms/admin and look at the scripts that create the catalog views and get the underlying tables to do a query like this, but it is a bad idea. Oracle can change those at any time without warning.

You are better off going with the DBA views or one of the suggestions that slightwv gave.  They all should work just fine and would be reusable in case of dictionary changes.

I did the text from dba_views where view_name = 'DBA_TAB_PRIVS' same thing

Thanks Very much for the help