CodeIgniter Active Record use "USING" in query - php

Question

I am trying to replicate the following query using Active Record in CodeIgniter but I can't find where in the documentation or searching how you use USING in a query.
SELECT *
FROM categories C
LEFT OUTER JOIN motorcycle_brands MB
USING ( CatID )
LEFT OUTER JOIN powersport_categories PS
USING ( CatID )
WHERE C.CatID = :uniqueID
This is what I have now:
$this->db->select('*');
$this->db->from('categories C');
$this->db->join('motorcycle_brands MB', 'CatID', 'left outer');
$this->db->join('powersport_categories PS', 'CatID', 'left outer');
$this->db->where('C.CatID =', $this->option_id);
$suboptions = $this->db->get();
I have tried changing
$this->db->join('motorcycle_brands MB', 'USING (CatID)', 'left outer');
$this->db->join('powersport_categories PS', 'USING (CatID)', 'left outer');

Answer 1

There is no built-in support for JOIN using USING in the active record class. The best that you can do is change the join() function in "system/database/DB_active_rec.php" this file.
Please refer this question for the complete reference.
codeigniter active records join with using?

Answer 2

The USING clause is used if several columns share the same name but you don’t want to join using all of these common columns. The columns listed in the USING clause can’t have any qualifiers in the statement, including the WHERE clause:
The ON clause is used to join tables where the column names don’t match in both tables. The join conditions are removed from the filter conditions in the WHERE clause:
So your code should be,
$this->db->select('*');
$this->db->from('categories C');
$this->db->join('motorcycle_brands MB', 'MB.CatID = C.Id', 'left outer');
$this->db->join('powersport_categories PS', 'C.Id = PS.CatID ', 'left outer');
$this->db->where('C.CatID =', $this->option_id);
$suboptions = $this->db->get();