create or replace function find_first_childs (obj_x VARCHAR2)
return objects_below as first_childs objects_below;
begin
    select LPAD(' ', 5*level)||objects.name
    BULK COLLECT into first_childs
    FROM objects JOIN object_types USING (object_type_id)
    where level < (
        select level from objects where name = obj_x
        start with parent_id is null CONNECT by prior object_id = parent_id
        ) + 1
    START WITH objects.name = obj_x
        CONNECT by prior objects.object_id = objects.parent_id;

    return first_childs;
end;

select * from find_first_childs('ін-94-1');