Re: Inaccurate results from numeric ln(), log(), exp() and pow() - Mailing list pgsql-hackers

Dean Rasheed <dean.a.rasheed@gmail.com> writes:
> On 14 November 2015 at 00:16, Dean Rasheed <dean.a.rasheed@gmail.com> wrote:
>> I can't see a way to make that work reliably. It would need to be
>> 10^estimate_ln_weight(base) and the problem is that both exp and
>> ln_weight could be too big to fit in double variables, and become
>> HUGE_VAL, losing all precision.

> Of course I meant 10^ln_weight could be too big to fit in a double.

Drat, that's the second time in this review that I've confused
ln_weight(x) with ln(x).  Time to call it a day ...
        regards, tom lane