Since I'm moving to sphinx search engine to improove my ebsite performance I'm trying to translate the old mysql queries to new sphinx language.
The point is to sort results based on a math operation between votes to my posts and the points given for each vote (going from 1 to 5).
So for example, if i got 3 votes for a post and I got vote 1=5points vote 2=3points and vote 3=2points, my table will contain a field named votes with an integer = 3 (votes=3) and a field with an integer of 5+3+2 (points=10).
Due to this the final rating for such post will be points/votes, in this example it will be 10/3=3,333...
Assuming I'm using the sphinx api to get a list of top rated posts in DESCENDING order, this is the old mysql query i had on my php script:
mysql_query("SELECT * FROM table ORDER BY points/votes DESC LIMIT $start,$stop");
I tried to build a sphinx query, but it is not working and always giving 0 results. Please read tall the // commented lines that describe all the tries I did.
require("sphinxapi.php");
$cl = new SphinxClient;
$index = index;
$cl->setServer("localhost", 9312);
$cl->SetMatchMode(SPH_MATCH_FULLSCAN);
//$cl->SetSortMode(SPH_SORT_EXTENDED, 'IDIV(points,votes) DESC'); //not working
//$cl->SetSortMode(SPH_SORT_EXTENDED, '(points DIV votes) DESC'); //not working
//$cl->SetSortMode(SPH_SORT_EXTENDED, 'points/votes DESC'); //not working
//$cl->SetSortMode(SPH_SORT_EXTENDED, '(points/votes) DESC'); //not working
$cl->setLimits($start,$stop,$max_matches=1000);
$query = "";
Would you please help me out finding what's wrong... thanks.
