Hi,

> What I would like is: nothing must happend when an update is sent to
> column 2.

you mean NO CHANGES can take place (other than col2 change) if COL2 is
changed??
like:

if (new.column2 is distinct from old.column2) then
begin
new.column1 = old.column1;
new.column3 = old.column3;
-- and so on...
end


I'm not sure I understood what you want.


Regards,
Anderson Farias