Audit Trail

Hi All,

As I want to do audit on some tables for Insert Update & Delete. So I am trying to create a function.

To enable the auditing I need to create this function which I am unable to & the error below.

Can anybody help with this. Or any documentation link for this particular function. I am using Postgres 8.2.4 & Linux kernel 2.6.9

Thanks & Regards

M.AHRAM KHAN