how to kill postgreSQL session

Hi there,
 
I'm a developer who is working on PostgreSQL API and i got stuck in Terminating session.
I'm working on PostgreSQL 8.3.
 
Please, help if anyone has ideas on how to kill PostgreSQL session.
 
i found this code in misc.c
 

#ifdef NOT_USED

 

/* Disabled in 8.0 due to reliability concerns; FIXME someday */

Datum

pg_terminate_backend(PG_FUNCTION_ARGS)

{

           PG_RETURN_INT32(pg_signal_backend(PG_GETARG_INT32(0), SIGTERM));

}

 

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