How to check blocking locks

Question

I have a query as to how to check for blocking locks in the database. I am trying to check it from TOAD but the session of TOAD is hanging. I hope, my question is clear.
Please, help in solving the doubt.
regards

Answer 1

Hi user574290,
Here is other script:
clear screen
set serveroutput on
BEGIN
dbms_output.enable(1000000);
for do_loop in (select session_id, a.object_id, xidsqn, oracle_username, b.owner owner,
                b.object_name object_name, b.object_type object_type
                FROM v$locked_object a, dba_objects b
                   WHERE xidsqn != 0
                    and b.object_id = a.object_id)
loop
    dbms_output.put_line('.');
    dbms_output.put_line('Blocking Session   : '||do_loop.session_id);
     dbms_output.put_line('Object (Owner/Name): '||do_loop.owner||'.'||do_loop.object_name);
    dbms_output.put_line('Object Type        : '||do_loop.object_type);
     for next_loop in (select sid from v$lock
                     where id2 = do_loop.xidsqn
                         and sid != do_loop.session_id)
     LOOP
          dbms_output.put_line('Sessions being blocked   :  '||next_loop.sid);
    end loop;          
end loop;
END;
/Best Regards,
Francisco Munoz Alvarez
www.oraclenz.com