From: Tom Lane <tgl@sss.pgh.pa.us>
To: pgsql-hackers@lists.postgresql.org
Subject: exp() versus the POSIX standard
Date: Thu, 11 Jun 2020 19:22:32 -0400
Message-ID: <582552.1591917752@sss.pgh.pa.us> (raw)
The POSIX standard says this about the exp(3) function:
If x is -Inf, +0 shall be returned.
At least on my Linux box, our version does no such thing:
regression=# select exp('-inf'::float8);
ERROR: value out of range: underflow
Does anyone disagree that that's a bug? Should we back-patch
a fix, or just change it in HEAD? Given the lack of user
complaints, I lean a bit towards the latter, but am not sure.
regards, tom lane
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To: pgsql-hackers@postgresql.org
Cc: tgl@sss.pgh.pa.us, pgsql-hackers@lists.postgresql.org
Subject: Re: exp() versus the POSIX standard
In-Reply-To: <582552.1591917752@sss.pgh.pa.us>
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