Re: Paginating searchs = performance problem
| From: | Ivo F.A.C. Fokkema | Date: | Fri, 20 Oct 2006 15:22:36 +0000 |
| Subject: | Re: Paginating searchs = performance problem | ||
| References: | 1 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-243403@lists.php.net to get a copy of this message | ||
On Fri, 20 Oct 2006 17:04:35 +0200, Fourat Zouari wrote:
> I have PHP/PostgreSQL application were i got a search page with some items
> to search, am building the search query on server side.
>
> I need to display a paginated search and for this i need to get the total
> count of lines matching the search before OFFSET/LIMITing my page, am i
> obliged to repeat the query twice ??? first to get the total count, second
> to get my page.
>
> it's very heavy
>
> Any one's suggesting better doing ?
As far as I know, this is the only way. The first query, you don't need to
sort your data though, and you might be able to drop a join, depending on
whether or not you use the joined table in your WHERE clause.
But I think due to caching the database will not take a long time for the
second query, since it just recently had (almost) the same query - YMMV.
Ivo