In article <4CBA2BC4(dot)9030105(at)darrenduncan(dot)net>,
Darren Duncan <darren(at)darrenduncan(dot)net> writes:
> I would further recommend turning the above into a separate data type,
> especially if you'd otherwise be using that constraint in several
> places, like this ...
FWIW, the shatypes contrib package includes a binary md5 datatype.