Function pq_sys::PQfn

pub unsafe extern "C" fn PQfn(
    conn: *mut PGconn, 
    fnid: c_int, 
    result_buf: *mut c_int, 
    result_len: *mut c_int, 
    result_is_int: c_int, 
    args: *const PQArgBlock, 
    nargs: c_int
) -> *mut PGresult