Re: timestamp with/without time zone
От | Bruce Momjian |
---|---|
Тема | Re: timestamp with/without time zone |
Дата | |
Msg-id | 200106212220.f5LMK8L08749@candle.pha.pa.us обсуждение исходный текст |
Ответ на | Re: timestamp with/without time zone (Tom Lane <tgl@sss.pgh.pa.us>) |
Список | pgsql-hackers |
Thomas, can we change the description to just 'timestamp'? > Peter Eisentraut <peter_e@gmx.net> writes: > > Thomas Lockhart writes: > >> SQL9x "timestamp" has no notion of time zones. PostgreSQL "timestamp" > >> does. > > > AFAICT, it does not. The value is stored in UTC (more or less) and is > > converted to the local time zone for display. But a data type is defined > > in terms of storage, not display. > > I think Thomas' point is mainly a syntactic one, that our timestamp type > will accept and display timezones --- which makes it compatible at the > I/O level with SQL-style TIMESTAMP WITH TIME ZONE. But I don't find > that argument very persuasive. An app that is expecting SQL-compliant > handling of the zone info will still be broken, only in subtle > hard-to-find ways instead of nice simple obvious ways. IMHO we don't > support TIMESTAMP WITH TIME ZONE, and we really oughtn't give people the > impression that we do. Whether what we have is better than the spec's > definition is irrelevant here; the point is that it's different. > > regards, tom lane > -- Bruce Momjian | http://candle.pha.pa.us pgman@candle.pha.pa.us | (610) 853-3000+ If your life is a hard drive, | 830 Blythe Avenue + Christ can be your backup. | Drexel Hill, Pennsylvania19026
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