Hi Tarun,
you are right, access data by direct reading table is not good, but i want to get a internal table for node hierarchies, i search the srg manager and transaction manager, there is not method can get this table.
so i want to get the data by hierarchies. because i think just hierarchies for node will not have any check or any relative node to limit. so i guess maybe there is a db table to store the data.
such as :
dbkey
parent node key.