using v$Locked_objects

[Pratibha Malhotra]

Apart from using v$Locked_objects do we have any other table/view etc that can tell us whether a table has locks on it or not.

I am currently using following query

select a.owner, a.object_name, b.locked_mode, b.session_id from dba_objects a, v$locked_object b where a.object_id = b.object_id

Please tell how expensive is it to run above query often.

Kindly help

Pratibha Malhotra