> > Something like this:
> > execute statement 'select old.' || fieldname || ' from table_name
> where
> ...'
>
> This won't work.
>
> Using EXECUTE STATEMENT with a context variable (NEW or OLD)
> will never work, cause that's only available inside a trigger, not in a
> new statement

I didn't know that, thanx for pointing it out.
And if I needed something like original poster described I would definitely write triggers for each table separately or I would use your LogManager.

Sasha