Re: COUNT & Pagination

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От David Shadovitz
Тема Re: COUNT & Pagination
Дата
Msg-id 20040113174533.M77388@www.shadovitz.com
обсуждение исходный текст
Ответ на Re: COUNT & Pagination  (mallah@trade-india.com)
Ответы Re: COUNT & Pagination  ("scott.marlowe" <scott.marlowe@ihs.com>)
Список pgsql-performance
> We avert the subsequent execution of count(*) by passing the
> value of count(*) as a query parameter through the link in page
> numbers.

Mallah, and others who mentioned caching the record count:

Yes, I will certainly do this.  I can detect whether the query's filter has
been changed, or whether the user is merely paging through the results or
sorting* the results.

I'd love to completely eliminate the cost of the COUNT(*) query, but I guess
that I cannot have everything.

* My HTML table column headers are hyperlinks which re-execute the query,
sorting the results by the selected column.  The first click does an ASC
sort; a second click does a DESC sort.

Thanks.
-David

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