From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
---|---|
To: | "Jim C(dot) Nasby" <jnasby(at)pervasive(dot)com> |
Cc: | pgsql-hackers(at)postgresql(dot)org |
Subject: | Re: Divid by zero bug in float |
Date: | 2006-02-22 17:40:11 |
Message-ID: | 13354.1140630011@sss.pgh.pa.us |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-hackers |
"Jim C. Nasby" <jnasby(at)pervasive(dot)com> writes:
> Shouldn't this produce Infinity instead of an error?
> postgresql=# select 5::float/0::float;
> ERROR: division by zero
No, I don't think so. SQL92 6.12 <numeric value expression> quoth:
4) The dyadic arithmetic operators <plus sign>, <minus sign>, <as-
terisk>, and <solidus> (+, -, *, and /, respectively) specify
addition, subtraction, multiplication, and division, respec-
tively. If the value of a divisor is zero, then an exception
condition is raised: data exception-division by zero.
There is nothing in there about allowing IEEE infinities instead, and
I very strongly doubt that the average database user would expect such
behavior.
regards, tom lane
From | Date | Subject | |
---|---|---|---|
Next Message | Jim C. Nasby | 2006-02-22 18:03:40 | Re: Divid by zero bug in float |
Previous Message | Jim C. Nasby | 2006-02-22 17:32:05 | Divid by zero bug in float |