Question

I have code like this:

function search_keyword(){       

        $keyword = $this->db->escape_like_str(trim($_POST['keyword']));

        $sql = " ( SELECT  name, id_global_info AS id, body AS body, tag AS tag  ,info_type_id AS info_type, \"global_info\" AS mytable FROM global_info WHERE ";
         $sql .= " MATCH (name, body, tag) AGAINST ( '$keyword') ";
          $sql .= " ) UNION ALL "; 

          $sql .= " ( SELECT name, id_person AS id, surname AS body, info AS tag , location AS info_type, \"person\" AS mytable FROM person WHERE ";
             $sql .= " MATCH (name, surname, info) AGAINST ( '$keyword' ) ";       

          $sql .= " ) UNION ALL ";

          $sql .= "( SELECT name, id_event AS id, body AS body, caffe_id AS tag , date AS info_type, \"event\" AS mytable FROM event WHERE ";
             $sql .= " MATCH (name, body) AGAINST ( '$keyword' ) ";             

        $sql .= " ) UNION ALL ";

          $sql .= "( SELECT name, id_caffe AS id, description AS body, adress AS tag, location_id AS info_type, \"caffe\" AS mytable FROM caffe WHERE ";
             $sql .= " MATCH (name, description) AGAINST ( '$keyword' ) ";           

        $sql .= " ) ";        
        $q = $this->db->query($sql);
         return $q = $q->num_rows() == 0 ? FALSE :  $q->result();
    }

How can I count number of results per row and then order them by count result?

Example:
I want to search word car – first row have name car, and in the body word car is appearing 7 times, and in second row car is appearing 2 times in the body. I want to count how many time word car is found and then order results by that count result.

Answer 1

I think it’s best that you did it using PHP:

$counters = array();
foreach($q->result as $r)
  $counters[$r['mytable']]++;

Since I do not know your database interface, this is not exact code but I believe you can get the general idea (I am assuming that your resultset object is an array of associative arrays).

Edit:

Alternate schema

CREATE TABLE info_generic (id int not null auto_increment PRIMARY KEY, name varchar(100),
  record_type tinyint not null default 1, body TEXT, tag_id int , info_type_id int , 
  KEY (record_type) record_type,
  KEY(tag_id) tag_id,
  KEY(info_type_id) info_type_id
);

CREATE TABLE tags(id int not null auto_increment PRIMARY KEY,  description VARCHAR(100) );

CREATE TABLE info_types(id int not null auto_increment PRIMARY KEY, 
  description VARCHAR(100), record_type tinyint default 1 
);

Attributes explained

record_type : 1 -> global_info, 2 -> person , 3 -> event, 4 -> caffe

body : 1 -> body , 2 -> surname, 3 -> body , 4 -> description

tag : 1 -> tag , 2 -> info, 3 -> body , 4 -> description

You can then construct a single SQL using INNER JOINs to feed the records to Sphinx.