$this->db->select('ae_users.employee_id, ae_users.emp_name, ae_users.emp_name2, ae_users.emp_name3');
$this->db->from('ae_users');
$this->db->where_in('ae_users.employee_id',$employee_ids);
$query =$this->db->get();
if ($query->num_rows()) {
return $query->result_array();
} else {
return 0;
}->where('(library.available_until >=', date("Y-m-d H:i:s"), FALSE)
->or_where("library.available_until = '00-00-00 00:00:00')", NULL, FALSE)$table = "my_table";
$id = 1;
$update = ["status"=>"working"];
//Edit just above /\ if you don't need extra "where" clause
$query = $this->db->select()
->from($table)
->where('id', $id)
->get_compiled_select();
$data = $this->db->query("$query FOR UPDATE")->row_array();
$this->db->where('id', $data['id'])->update($table,$update);