I really appreciate the addition of tanh into core postgres.
If someone doubts it is useful: it is used as a part of math in
geographical calculations.
Say you have your cars in planar Mercator projection and want to move them
"1 second forward by this heading with this speed". sin/cos and the
Thanks, Tom !
Thank you everyone for your help and patience.
Cheers,
Lætitia
Le mar. 12 mars 2019 à 20:57, Tom Lane a écrit :
> =?UTF-8?Q?L=C3=A6titia_Avrot?= writes:
> > So, as you're asking that too, maybe my reasons weren't good enough.
> You'll
> > find enclosed a new version of the
=?UTF-8?Q?L=C3=A6titia_Avrot?= writes:
> So, as you're asking that too, maybe my reasons weren't good enough. You'll
> find enclosed a new version of the patch
> with asinh, acosh and atanh (v5).
Pushed with some minor adjustments (mainly cleanup of the error handling).
> Then I tried for
Dean Rasheed writes:
> +1 for including the inverse functions. However, it looks to me like
> the inverse functions are C99-specific, so they might not be available
> on all supported platforms. If they're not, we may need to provide our
> own implementations.
FWIW, I'm pretty sure they're
On Sun, 3 Feb 2019 at 15:12, Tom Lane wrote:
>
> Andrew Gierth writes:
> > The spec doesn't require the inverse functions (asinh, acosh, atanh),
> > but surely there is no principled reason to omit them?
>
> +1 --- AFAICS, the C library has offered all six since C89.
>
+1 for including the
Gavin Flower writes:
> On 12/02/2019 06:44, Lætitia Avrot wrote:
>> I considered that option before writing my patch but I refrained for 2
>> reasons:
>>
>> - There is no consensus about how to name these functions. The
>> standard 8000-2 goes with arsinh, arcosh and artanh,
>> but you will
On 12/02/2019 06:44, Lætitia Avrot wrote:
Hi Andrew and Tom,
I considered that option before writing my patch but I refrained for 2
reasons:
- There is no consensus about how to name these functions. The
standard 8000-2 goes with arsinh, arcosh and artanh,
but you will find easily
Hi Andrew and Tom,
I considered that option before writing my patch but I refrained for 2
reasons:
- There is no consensus about how to name these functions. The standard
8000-2 goes with arsinh, arcosh and artanh,
but you will find easily arcsinh, arccosh and arctanh or even argsinh,
argcosh
Andrew Gierth writes:
> The spec doesn't require the inverse functions (asinh, acosh, atanh),
> but surely there is no principled reason to omit them?
+1 --- AFAICS, the C library has offered all six since C89.
regards, tom lane
> "Lætitia" == Lætitia Avrot writes:
[snip patch]
The spec doesn't require the inverse functions (asinh, acosh, atanh),
but surely there is no principled reason to omit them?
--
Andrew (irc:RhodiumToad)
Hi Alvaro,
Thank you so much for taking the time to review the patch and for taking
the time again to sort things
out with me this evening.
> I see that in dtanh() you set errno to 0 before calling tanh(), but 1)
> you don't check for it afterwards (seems like you should be checking for
>
On 2019-Jan-31, Lætitia Avrot wrote:
> Hi,
>
> Thanks to Emil Iggland's kind review, I added precision on documentation
> for hyperbolic functions.
Hello
I see that in dtanh() you set errno to 0 before calling tanh(), but 1)
you don't check for it afterwards (seems like you should be checking
Hi,
Thanks to Emil Iggland's kind review, I added precision on documentation
for hyperbolic functions.
I added the patch to the next commitfest.
Cheers,
Lætitia
Le dim. 27 janv. 2019 à 20:39, Lætitia Avrot a
écrit :
> Hi,
>
> Thanks for your time and advice, Tom!
>
>
>> > [
Hi,
Thanks for your time and advice, Tom!
> > [ adding_log10_and_hyperbolic_functions_v1.patch ]
>
> No objection to the feature, but
>
> - Why are you using the float4-width library functions (coshf etc)
> rather than the float8-width ones (cosh etc)?
>
> Well, I guess the only reason is that
=?UTF-8?Q?L=C3=A6titia_Avrot?= writes:
> [ adding_log10_and_hyperbolic_functions_v1.patch ]
No objection to the feature, but
- Why are you using the float4-width library functions (coshf etc)
rather than the float8-width ones (cosh etc)?
- I wonder whether these library functions exist
Hello hackers,
In his blog post (What's new in SQL 2016)[
https://modern-sql.com/blog/2017-06/whats-new-in-sql-2016], Markus Winand
explained some of the changes added to SQL:2016. I spotted that Postgres
was behind other RDBMS on hyperbolic functions and log10 function.
The log10 function
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