| From: | Andy Balholm <andy(at)balholm(dot)com> |
|---|---|
| To: | Peter Eisentraut <peter_e(at)gmx(dot)net> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Kevin Grittner <Kevin(dot)Grittner(at)wicourts(dot)gov>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: dividing money by money |
| Date: | 2010-07-17 14:20:45 |
| Message-ID: | 4D1A6144-3423-4D92-AEF3-FF05DC4D603D@balholm.com |
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| Lists: | pgsql-hackers pgsql-www |
On Jul 17, 2010, at 3:20 AM, Peter Eisentraut wrote:
> On fre, 2010-07-16 at 10:31 -0400, Tom Lane wrote:
>> The other argument that I found convincing was that if the
>> operator was defined to yield numeric, people might think that
>> the result was exact ... which of course it won't be, either way.
>> Choosing float8 helps to remind the user it's an approximate quotient.
>
> Why is it approximate? Aren't money values really integers?
$1.00 / 3.00 = 0.333333333333333333333333333333333333333333333333...
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