Re: Inaccurate results from numeric ln(), log(), exp() and pow()

Поиск
Список
Период
Сортировка
От Dean Rasheed
Тема Re: Inaccurate results from numeric ln(), log(), exp() and pow()
Дата
Msg-id CAEZATCU4mKZD+BC2gBWySXB-mr4AUMzccVV3j6CXTc_15p_tWw@mail.gmail.com
обсуждение исходный текст
Ответ на Re: Inaccurate results from numeric ln(), log(), exp() and pow()  (Dean Rasheed <dean.a.rasheed@gmail.com>)
Ответы Re: Inaccurate results from numeric ln(), log(), exp() and pow()
Список pgsql-hackers
Дерево обсуждения 
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.

Regards,
Dean

В списке pgsql-hackers по дате отправления:

Предыдущее
От: Dean Rasheed
Дата:
Сообщение: Re: Inaccurate results from numeric ln(), log(), exp() and pow()
Следующее
От: Tom Lane
Дата:
Сообщение: Re: Inaccurate results from numeric ln(), log(), exp() and pow()