CI_DB_result::free_result PHP Method

    public function free_result()
    {
        $this->result_id = FALSE;
    }

 /**
  * Process Query
  *
  * Converts a query result into an array of objects.
  * Also updates this object
  *
  * @ignore
  * @param	CI_DB_result $query
  */
 protected function _process_query($query)
 {
     if ($query->num_rows() > 0) {
         // Populate all with records as objects
         $this->all = array();
         $this->_to_object($this, $query->row());
         // don't bother recreating the first item.
         $index = $this->all_array_uses_ids && isset($this->id) ? $this->id : 0;
         $this->all[$index] = $this->get_clone();
         if ($query->num_rows() > 1) {
             $model = get_class($this);
             $first = TRUE;
             foreach ($query->result() as $row) {
                 if ($first) {
                     $first = FALSE;
                     continue;
                 }
                 $item = new $model();
                 $this->_to_object($item, $row);
                 if ($this->all_array_uses_ids && isset($item->id)) {
                     $this->all[$item->id] = $item;
                 } else {
                     $this->all[] = $item;
                 }
             }
         }
         // remove instantiations
         $this->_instantiations = NULL;
         // free large queries
         if ($query->num_rows() > $this->free_result_threshold) {
             $query->free_result();
         }
     } else {
         // Refresh stored values is called by _to_object normally
         $this->_refresh_stored_values();
     }
 }