How can i get information about postgres-process?

Hi Everybody!

We develop university information system under Linux using
DBMS Postgres, Linux-clients (SWI-Prolog,C), MS-Windows-clients.

For analysis of running postgres-processes
we need get information: <user> <sql-query> <work time>.
How can we get it?

On must platforms, the 'ps' command in 6.4 postgresql gives you current
user/database/query. You can also use -d flag on postgres/postmaster to
see the queries.

-- 
  Bruce Momjian                        |  http://www.op.net/~candle
  maillist@candle.pha.pa.us            |  (610) 853-3000
  +  If your life is a hard drive,     |  830 Blythe Avenue
  +  Christ can be your backup.        |  Drexel Hill, Pennsylvania 19026