How to implement row constructor syntax using CodeIgniter's where_in() query building method

Question

Below is CodeIgniter single column where_in clause $this->db->where_in('x1',$val);

how can I pass multiple column in CodeIgniter where_in clause like below MySQL query:

select *
from tab1
where (col1,col2) in ((1,2),(2,3))`

Answer 1

Assume your data array is like this(should be)

$val1 = array(1,2);
$val2 = array(2,3);

And query should be

$this->db->select('*');
$this->db->from('tab1');
$this->db->where_in('col1',$val1);
$this->db->or_where_in('col2',$val2);
$query = $this->db->get();
$result = $query->result_array();

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Or else you can use

$this->db->query("select * from tab1 where (col1,col2) in ($val1,$val2)");