[HACKERS] execute sql commands in core

[black light]

Hi,
I want to add some hard-wired extra authentication codes in my PG. The only
problem is how to access tables to get/change information from core
(auth.c)?
I have changed the SPI functions to use them but it was not effective (lots
of different errors!)
In fact, i want to add a table to system catalog and SELECT/UPDATE it from
auth.c.

Thanks - B. L.