Re: [GENERAL] division by zero
От | Bruce Momjian |
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Тема | Re: [GENERAL] division by zero |
Дата | |
Msg-id | 200303101603.h2AG36A28477@candle.pha.pa.us обсуждение исходный текст |
Ответ на | Re: [GENERAL] division by zero ("Merlin Moncure" <merlin.moncure@rcsonline.com>) |
Ответы |
Re: [GENERAL] division by zero
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Список | pgsql-hackers |
Merlin Moncure wrote: > Tom Lane wrote: > > > > I checked into this, and indeed OS X 10.2 is behaving funny: integer > > divide by zero doesn't raise any signal, it just returns a bogus > answer. > > They're within their rights to do so according to the ANSI C spec > > (wherein division by zero is stated to have undefined behavior). > > But since other BSD-derived Unixen all seem to raise SIGFPE, I can't > > help wondering if this shouldn't be considered a bug. > > FWIW, this also is a problem with some of the windows ports. For > example, 'select 0/0' is unpredictable and can cause the server to gpf > and restart. This does not include the SRA port, because I don't have > it. I just tested the SRA Win32 threaded port and both SELECT 1/0 and SELECT 0/0 crash the process. I have reported this to Tatsuo. -- Bruce Momjian | http://candle.pha.pa.us pgman@candle.pha.pa.us | (610) 359-1001+ If your life is a hard drive, | 13 Roberts Road + Christ can be your backup. | Newtown Square, Pennsylvania19073
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