So how good is the random() function in pgsql? How many iterations
through the PRNG before the PRNG loops?
Does it depend on the underlying O/S? Which, in our case, is CentOS 5,
(I ask, because back in my Visual Basic days, I ran into an issue where
the built-in PRNG would loop after 30 bits worth had been used. Which
caused issues in a situation where we really need a whole lot more
length in our PRNG.)