Getting named fields of NEW

Hello,

I am writing a trigger function, which is supposed to take a field name
as a parameter (this is because I want to use the same function for
many tables).

When in an INSERT trigger (firing *before* the insert), you can use the
NEW parameter to access the row to be inserted. The problem is that I
don't know the names of the fields. I can't figure out how to use a
variable (or input parameter in this case) as a field marker, as in

NEW.VarName

The documentation on FOR-IN-EXECUTE doesn't seem to help in this case
:(

Erik

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