Re: [HACKERS] What about LIMIT in SELECT ?

Поиск
Список
Период
Сортировка
От Terry Mackintosh
Тема Re: [HACKERS] What about LIMIT in SELECT ?
Дата
Msg-id Pine.LNX.3.95.981014132744.14397C-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:

>     See the fetch manual page.<P>

OK, I will.

>     This only prevents all row results from being transfered to the client.

Yes, this is good, but this is only half the problem ...

>     The entire query must be evaluated, even if you only want just the first

... this is the other half.

>     few rows. Consider a query that has an order by.  There is no way
>     to return any rows until the entire query is evaluated and sorted.

This is where I was hoping one of you guru types might have some insight,
-- how to stop short a query at X rows, even if it has an order by.

No way?

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!


В списке pgsql-hackers по дате отправления:

Предыдущее
От: Terry Mackintosh
Дата:
Сообщение: Re: [HACKERS] What about LIMIT in SELECT ?
Следующее
От: Bruce Momjian
Дата:
Сообщение: Re: [HACKERS] What about LIMIT in SELECT ?