Function not RAISE NOTICE if a parameter is NULL

Hi,

I have a function, that I'm debugging...

If I use NULL in any parameter the function does not RAISE any NOTICE. I can't pass NULL values in parameters?

[code]
select apr_ins_gder_2_1
('table_fgh' /* Varchar */,
'id_fgh' /* Varchar */,
'5' /* Varchar */,
NULL /* Date */,
'2001-01-05' /* Date */,
'coment...' /* Varchar */)
[/code]

Solutions for pass NULL values in the parameters and receive RAISE NOTICE's?

Sorry for my english.


Best Regards,