| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Chapman Flack <chap(at)anastigmatix(dot)net> |
| Cc: | Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com>, Joe Nelson <joe(at)begriffs(dot)com>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: POC: rational number type (fractions) |
| Date: | 2020-05-18 22:14:36 |
| Message-ID: | 20552.1589840076@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Chapman Flack <chap(at)anastigmatix(dot)net> writes:
> On 05/18/20 17:33, Peter Eisentraut wrote:
>> The numeric type already stores rational numbers. How is this different?
>> What's the use?
> Won't ever quite represent, say, 1/3, no matter how big you let it get.
There surely are use-cases for true rational arithmetic, but I'm
dubious that it belongs in core Postgres. I don't think that enough
of our users would want it to justify expending core-project maintenance
effort on it. So I'd be happier to see this as an out-of-core extension.
(That'd also ease dealing with the prospect of having more than one
variant, as was mentioned upthread.)
regards, tom lane
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