RE: [PHP] Previous & Next Navigation

I don't know if it's possible (or faster, or more efficient), but could you query your millions of records for those 3k - 5k, insert them into a temp table, then do your LIMIT queries on that table for your prev/next pages? Just an idea! Jason Soza Juneau, Alaska ----- Original Message ----- From: "Jay Blanchard" <jay.blanchard@niicommunications.com> Date: Monday, June 3, 2002 11:07 am Subject: RE: [PHP] Previous & Next Navigation > [snip] > So you think it's more efficient and faster to load a 3 - 5 > thousand row > table into an array in memory and pass that around to all of your > scripts(through sessions?), rather than just passing a $page > variable and doing a > query to return 30 rows on each page?? > > If you pass a $Page variable, you can make your query like this: > > SELECT * FROM table LIMIT $Page*30,30 > > Just increment and decriment $Page as you traverse the > results...easy, eh? > [/snip] > > It's definitely faster, as for more efficient I would have to do > benchmarks.The original table consists of millions of rows and > each time you query with > LIMIT the query traverses the entire set of records in the data to > get the > proper CONDITIONS. Given that there are 3k -5k rows amongst the > millionsthis requires a lot of search time for each query. The > memory footprint of > the 3k - 5k of records, even if the total memory needed for each > record is > 1k (which it is not), is 30k - 50k RAM, less than the size of most web > pages. The LIMIT query, running on a slow server to simulate dial-up > connections, takes anywhere from 1.3 to 2.2 minutes (been timing > it a lot > today) to execute. Since efficiency is often lumped in with speed, > I would > have to surmise that using an array in this instance would be more > efficientas well. > > Thanks! > > Jay > > > > > > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php > >