Re: [HACKERS] What about LIMIT in SELECT ?
От | Terry Mackintosh |
---|---|
Тема | Re: [HACKERS] What about LIMIT in SELECT ? |
Дата | |
Msg-id | Pine.LNX.3.95.981014133641.14397D-100000@terry1.acun.com обсуждение исходный текст |
Ответ на | Re: [HACKERS] What about LIMIT in SELECT ? (Bruce Momjian <maillist@candle.pha.pa.us>) |
Список | pgsql-hackers |
On Tue, 13 Oct 1998, Bruce Momjian wrote: > What we could do is _if_ there is only one table(no joins), and an index > exists that matches the ORDER BY, we could use the index to > short-circuit the query. > > I have added this item to the TODO list: > > * Allow LIMIT ability on single-table queries that have no ORDER BY or > a matching index > > This looks do-able, and a real win. Would this make web applications > happier? If there is an ORDER BY and no index, or a join, I can't > figure out how we would short-circuit the query. > Yes, this would do for most of my apps. It may just be my lack of sophistication, but I find that most web apps are very simple in nature/table layout, and thus queries are often on only a single table. Thanks Terry Mackintosh <terry@terrym.com> http://www.terrym.com sysadmin/owner Please! No MIME encoded or HTML mail, unless needed. Proudly powered by R H Linux 4.2, Apache 1.3, PHP 3, PostgreSQL 6.3 ------------------------------------------------------------------- Success Is A Choice ... book by Rick Patino, get it, read it!
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