Excuse me! Could i to ask a question?

Hi!
It's very sorry to disrupted you, but could you help me?
I am a programmer, and i want to use Postgresql 9.2.2 to store my
applications' data. I had to
build a trigger wich based on Database level( When the database startup
, this trigger will fired and
executed.),while i found there are not defined database-level trigger in
postgresql. I read the doc but could
not found methods that could replaced triggers based on database.
Coud you give me a hand? Are there any tables auto update when
postgresql  server startup,  in this
way i could create a trigger on this table when server startup!
Thanks a lot and best regards!
Edward
mailto:liu_wy@neusoft.com
---------------------------------------------------------------------------------------------------
Confidentiality Notice: The information contained in this e-mail and any accompanying attachment(s)
is intended only for the use of the intended recipient and may be confidential and/or privileged of
Neusoft Corporation, its subsidiaries and/or its affiliates. If any reader of this communication is
not the intended recipient, unauthorized use, forwarding, printing,  storing, disclosure or copying
is strictly prohibited, and may be unlawful.If you have received this communication in error,please
immediately notify the sender by return e-mail, and delete the original message and all copies from
your system. Thank you.
---------------------------------------------------------------------------------------------------