Commands out of sync; you can't run this command now while calling stored procedure in Mysql

Question

I am trying to run a procedure i am getting this error

Commands out of sync; you can't run this command now

here is the original error that i get

Commands out of sync; you can't run this command now

SELECT DISTINCT `property_id`, `pin`, `block_id`, `serial_no`, `status`, `ex_sn`, `ex_code`, `property_date_time`, `street_add`, `lab_name` FROM `view_property_user_lab` WHERE status = '6' AND lab_id = '01' AND designation IN( '5','6') LIMIT 10 

can any 1 tell me why i am getting this error and how to get rid of it . I am using Code igniter and i also tried this

$query->free_result().

within my procedure i have used this statement

   SELECT *
   FROM
  temp_calculated_rates_and_rules;
 -- and then
   TRUNCATE temp_calculated_rates_and_rules;

as this thing is called in PHP Loop which is like this

  $arrIds = array('5','10');
    foreach ($arrIds as $id)
    {
        $this->_StoredProcedureMapper->setPId($id);

        $p10values = $this->_StoredProcedureMapper->fetch_p10_values();
        if (intval(@$p10values[0]['is_exempted']) != 1)
        {
            $this->generate_p10($p10values);
        }

    }

and here is mapper function

    function fetch_p1_values()
{

    $qry = "CALL sp_main_pt10(?)";
    $result = $this->db->query($qry, $this->getPId());
    return $result->result_array();
}

And i am using "mysqli" driver

Answer 1

So you need to deal with the extra result sets generated by the stored procedure. The mysqli driver provides a method for this, but CodeIgniter may not make that method available.

From https://ellislab.com/forums/viewthread/73714/#562711:

I simply added the following into mysqli_result.php that is missing this command for some strange reason. (under /system/database/drivers/mysqli/mysqli_result.php)

// --------------------------------------------------------------------
  /**
   * Read the next result
   *
   * @return  null
   */   
  function next_result()
  {
    if (is_object($this->conn_id))
    {
      return mysqli_next_result($this->conn_id);
    }
  }
  // -------------------------------------------------------------------- 

Then in my model, I simply call $result->next_result() to loose the expected extraneous resultset.