access linux command from SQL Query

Alam Surya wrote:

hello all......

I have a litle question, do i have acces linux command from postgresql
query like send message to others linux user in LAN ? any feature for that ?

You could use a system() call in a C function, or you could use Peter
Eisentraut's pl/sh language:

http://webmail.postgresql.org/~petere/plsh.html

Of course, if you use trigger functions to send email messages you
lose transactional integrity with respect to the underlying data vs.
the email message in the face of a transaction abort. Therefore some
people do this in middleware after the transaction associated with the
email message has been committed.

Hope that helps,

Mike Mascari
mascarm@mascari.com