Question regarding triggers

 

   I'm writing a trigger but running into problems.  My problem is that I can not determine anyway to tell what fields are in the *new* record.  Without knowing what fields are there I get runtime errors if that's not what is being updated example:

 

CREATE FUNCTION "public"."check_shipment" () RETURNS trigger AS'

begin

    If new.shipment_type_id = 4 then

        --do something

    end if;

    return new;

end;

 

in the above example everything works if shipment_type_id is being updated.  If it is not I will receive a run-time error because shipment_type_id is not part of the record new.

 

Please help,

Dmitri