Tom Lane wrote:
> There is special-purpose software out there that can compute exactly
> with rational numbers, but you aren't likely to find it embedded in any
> general-purpose tools like databases --- the use-case just isn't wide
> enough. One reason why not is that it'll still fall down on irrational
> numbers.
>
<nit>
1/3 is a rational number. however, it is a repeating fraction when
expressed in decimal.
</nit>