CREATE TYPE objects_below IS TABLE OF VARCHAR2(200);

create or replace function find_objects_below(obj_x VARCHAR2)
return objects_below as object_name  objects_below;
begin
    select name
    bulk collect into object_name
    FROM objects
    START WITH objects.name = obj_x
    CONNECT by prior object_id = parent_id;

    return object_name;
end;

select * from  table(find_objects_below('розклад'));