Re: minimal update

Andrew Dunstan <andrew@dunslane.net> writes:
> Tom Lane wrote:
>> A BEFORE UPDATE trigger would be better, and probably hardly more
>> expensive than a wired-in facility (especially if you were willing to
>> write it in C).

> Yes. I also  prefer the trigger idea to a rule because triggers are easy 
> to enable  and disable. It's still a lot of work for what must be a 
> common want, though. Could it be done generically?

Well, you could write the trigger in C and it'd work for any table.
I think it could be as simple as a memcmp of the tuples' data areas,
since we now require padding bytes to be 0 ...
        regards, tom lane