Converting row sql sub query into Codeigniter Active record - mysql

Question

I have a sql which is running perfectly okie. I want to convert it into active record query but don't know how to convert these sub query into active record
below is my sql:
Select A.*, B.*
FROM
( SELECT ( 6371 * acos( cos( radians(24.8964089) ) * cos( radians(RB.`lat`) )
* cos( radians(RB.`lng`) - radians(67.06749)) + sin(radians(24.8964089))
* sin( radians(RB.`lat`)))) AS distance, RB.`id` as BRID , R.`name` as NAME
FROM
`rent_br` RB
JOIN `rent` R ON R.`id` = RB.`restId`
JOIN `rent_category` RC on R.`id` = RC.`restId`
WHERE
TRUNCATE(RB.`lat`, 0) >= TRUNCATE(24.8964089,0)
AND TRUNCATE(RB.`lat`, 0) < TRUNCATE(25.8964089,0)
AND RB.`isdelivery` = '1'
AND RC.`catId` = 11
/*AND ( rent.`tags` like '%burger%' OR rent.`name` like '%burger%' OR info.`name` like '%burger%' )*/
HAVING
`distance` <= 50
ORDER BY
`distance` ASC ) A
JOIN
(select max(radius) as maxRadius, rent_br_delivery_radius.`rest_brId` as bbrId from `rent_br_delivery_radius`
group by bbrId) B on `A`.BRID = B.bbrId
WHERE A.distance <= B.maxRadius
ORDER BY A.NAME

Answer 1

the only thing you have to consider here is the use of the get_compiled_select function of the query builder - once you understand that - its pretty easy. You just have to split your queries and merge them together to one query
the following should do the job
your subselect
$strSubQuery = $this->db
->select('
( 6371 * acos( cos( radians(24.8964089) ) * cos( radians(RB.`lat`) )
* cos( radians(RB.`lng`) - radians(67.06749)) + sin(radians(24.8964089))
* sin( radians(RB.`lat`)))) AS distance, RB.`id` as BRID , R.`name` as NAME
')
->from('rent_br RB')
->join('rent r', 'r.id = RB.restId')
->join('rent_category RC', 'R.id = RC.restId')
->where('TRUNCATE(RB.`lat`, 0) >= TRUNCATE(24.8964089,0)', NULL, false)
->where('TRUNCATE(RB.`lat`, 0) < TRUNCATE(25.8964089,0)', NULL, false)
->where('RB.isdelivery`', 1)
->where('RC.catId', 11)
->having('distance <=', 50)
->order_by('distance', 'ASC')
->get_compiled_select();
your subjoin query
$strSubQueryJoin = $this->db
->select_max('radius', 'maxRadius')
->select('rent_br_delivery_radius.rest_brId AS bbrId')
->from('rent_br_delivery_radius')
->group_by('bbrId')
->get_compiled_select();
and finally we put this pieces together
$query = $this->db
->select('A.*, B.*')
->from($strSubQuery.' A', false)
->join('('.$strSubQueryJoin.') B', 'A.BRID = B.bbrId', 'INNER', false)
->where('A.distance <= B.maxRadius', NULL, false)
->order_by('A.NAME')
->get();
That should pretty much do the job.