Re: next value expression
От | Neil Conway |
---|---|
Тема | Re: next value expression |
Дата | |
Msg-id | 1038415873.1958.60.camel@tokyo обсуждение исходный текст |
Ответ на | next value expression (Manfred Koizar <mkoi-pg@aon.at>) |
Ответы |
Re: next value expression
Re: next value expression |
Список | pgsql-hackers |
On Wed, 2002-11-27 at 10:29, Manfred Koizar wrote: > By accident I stumbled across the following paragraph in the August > 2002 draft of SQL 2003: > > If there are multiple instances of <next value expression>s > specifying the same sequence generator within a single > SQL-statement, all those instances return the same value for a > given row processed by that SQL-statement. > > Is this of any relevance to PG's nextval()? Somewhat -- SQL2003 defines sequence generators that are pretty much identical in functionality to PostgreSQL's sequences, although the syntax is a bit different. I submitted a patch for 7.4 that adjusts the CREATE SEQUENCE grammar to match SQL2003's CREATE SEQUENCE a little more closely, but there's a bunch more work that can be done, if we want to be fully SQL-compliant. Cheers, Neil -- Neil Conway <neilc@samurai.com> || PGP Key ID: DB3C29FC
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