| From: | Peter Eisentraut <peter_e(at)gmx(dot)net> |
|---|---|
| To: | Alvaro Herrera <alvherre(at)commandprompt(dot)com> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Robert Haas <robertmhaas(at)gmail(dot)com>, Зотов Роман <zotov(at)oe-it(dot)ru>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Prefered Types |
| Date: | 2011-05-07 21:24:52 |
| Message-ID: | 1304803492.15989.23.camel@vanquo.pezone.net |
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| Lists: | pgsql-hackers |
On fre, 2011-05-06 at 18:38 -0300, Alvaro Herrera wrote:
> I remember that one of the problems put forth against this idea was
> that stuff like int2+int2 which currently returns int2 would have to
> be changed to return int4, otherwise it risks overflow which it
> currently doesn't (not because the operator would change, but rather
> because some expressions would be lexed differently). And so on with
> other operators. I am not sure how severe this problem is for users
> in practice -- my uneducated guess is that mostly they will not care
> about such changes.
Modulo backward compatibility concerns, I don't think it would
necessarily be wrong if int2+int2 returned int4. sum(int2) returns
int8, and no one seems bothered by that.
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