Question

Is it possible to specify “USE INDEX” or “FORCE INDEX” in CodeIgniter, other than using

$this->db->query()

What I mean is if it’s possible to insert “FORCE INDEX” somewhere in one of ActiveRecord’s methods.

Answer 1

You can use the from() active record method to add this in queries like this:

$this->db->like('name', 'user', 'after')->from('users use index (name)')->get();

produces sql query like this:

 SELECT * FROM (`users` use index (name)) WHERE  `name`  LIKE 'user%'

One caveat is that the from() method tries to find identifiers and multiple tables so adding one or more , to it’s input is most likely to end up as an SQL syntax error.