[SQL] Help! Storing trees in Postgres

[Sergei O . Naumov]

Hi!
I just subscribed myself to this list and sent a message but I am not sure
that
it reached the list. So, I am asking one more time. :-)

Is there any way to implement a query in Postgres that would be in some way
analogues to Oracle's START WITH/CONNECT BY structure?

I'd very much appreciate any suggestions.

Thanks in advance,
                                Sergei