Re: [PATCH] Custom code int(32|64) => text conversions out of performance reasons
| От | Robert Haas |
|---|---|
| Тема | Re: [PATCH] Custom code int(32|64) => text conversions out of performance reasons |
| Дата | |
| Msg-id | AANLkTinUSOgBfxEfNXCORW0hpynt1qLR0Cdes03z4nUZ@mail.gmail.com обсуждение исходный текст |
| Ответ на | Re: [PATCH] Custom code int(32|64) => text conversions out of performance reasons (Tom Lane <tgl@sss.pgh.pa.us>) |
| Ответы |
Re: [PATCH] Custom code int(32|64) => text conversions out of performance reasons
Re: [PATCH] Custom code int(32|64) => text conversions out of performance reasons |
| Список | pgsql-hackers |
On Sat, Nov 20, 2010 at 10:38 AM, Tom Lane <tgl@sss.pgh.pa.us> wrote: > The trouble with that approach is that you have to depend on the > direction of rounding for negative quotients. Which was unspecified > before C99, and it's precisely pre-C99 compilers that are posing a > hazard to the current coding. Interesting. I wondered whether there might be compilers out there that handled that inconsistently, but then I thought I was probably being paranoid. > Likewise for the int64 case, which BTW is no safer for pre-C99 compilers > than it was yesterday: LL is not the portable way to write int64 > constants. Gah. I wish we had some documentation of this stuff. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company
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