From: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> |
---|---|
To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com>, Dean Rasheed <dean(dot)a(dot)rasheed(at)gmail(dot)com>, Vik Fearing <vik(dot)fearing(at)2ndquadrant(dot)com>, Fabien COELHO <coelho(at)cri(dot)ensmp(dot)fr>, Chapman Flack <chap(at)anastigmatix(dot)net>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
Subject: | Re: Greatest Common Divisor |
Date: | 2020-01-03 17:37:19 |
Message-ID: | 20200103173719.GA9629@alvherre.pgsql |
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On 2020-Jan-03, Robert Haas wrote:
> On Fri, Jan 3, 2020 at 10:23 AM Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> > Now, those functions were just exposing libc functionality, so there
> > wasn't a lot of code to write. There might be a good argument that
> > gcd isn't useful enough to justify the amount of code we'd have to
> > add (especially if we allow it to scope-creep into needing to deal
> > with "numeric" calculations). But I'm not on board with just
> > dismissing it as uninteresting.
>
> Yeah. There's always the question with things like this as to whether
> we ought to push certain things into contrib modules that are not
> installed by default to avoid bloating the set of things built into
> the core server. But it's hard to know where to draw the line. There's
> no objective answer to the question of whether gcd() or sinh() is more
> useful to have in core;
The SQL standard's feature T622 requires trigonometric functions, while
it doesn't list gcd() or anything of the sort, so there's that.
--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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