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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Dean Rasheed <dean.a.rasheed@gmail.com>
Cc: Michael Paquier <michael@paquier.xyz>
Cc: PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Cc: laetitia.avrot@gmail.com
Subject: Re: pgsql: Add support for hyperbolic functions, as well as log10().
Date: Thu, 14 Mar 2019 00:41:27 -0400
Message-ID: <6989.1552538487@sss.pgh.pa.us> (raw)
In-Reply-To: <CAEZATCX-mFwmx0NKbGsYJ6RAo8Hb=c+_CeNNXWQ7-BmK2_XVWw@mail.gmail.com>
References: <E1h3nUY-0000sM-Vf@gemulon.postgresql.org>
	<20190313022159.GR13812@paquier.xyz>
	<24813.1552447002@sss.pgh.pa.us>
	<20190313050331.GT13812@paquier.xyz>
	<17820.1552514192@sss.pgh.pa.us>
	<CAEZATCX-mFwmx0NKbGsYJ6RAo8Hb=c+_CeNNXWQ7-BmK2_XVWw@mail.gmail.com>

Dean Rasheed <dean.a.rasheed@gmail.com> writes:
> I'm amazed that jacana's asinh() returned -0 for an input of +0.

Even more amusingly, it returns NaN for acosh('infinity'), cf
https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=jacana&dt=2019-03-14%2003%3A00%3A34

Presumably that means they calculated "infinity - infinity" at some
point, but why?

So far, no other failures ...

			regards, tom lane




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