Drupal 7: field_data_commerce_line_items table is empty after Feeds import.

Drupal function update line items table

/*
 * Drupal 7: Using the latest EXPERIMENTAL Feeds module (7.x-2.x-dev from 2014-Dec-16) to import Commerce orders and line items the line items are not attached on each order.
 * Technically, the database table "field_data_commerce_line_items" that keeps the reference for each order is empty 
 * and values only exist on "commerce_line_item" table. We are using Feeds to import data for "Orders" as also as "Product Line Items".
 * With this simple function we fill up the "field_data_commerce_line_items" table from "commerce_line_item" table.
 */

// Update line items after feeds import (so table field_data_commerce_line_items has values)
function MYMODULE_update_product_line_items() {
  
  // Get required values from table commerce_line_item
  $result = db_query(
    'SELECT c.line_item_id, c.order_id 
    FROM {commerce_line_item} c 
    WHERE c.type = :type', 
    array(':type' => 'product')
  );

  foreach ($result as $record) {
    // $record->nid, $record->title, $record->created
    $order_id = $record->order_id;
    $line_item_id = $record->line_item_id;
    
    if ($order_id && $line_item_id) {
        // Get order from order_id
        $order = commerce_order_load($order_id);
        // Get line_item from line_item_id
        $line_item = commerce_line_item_load($line_item_id);

        // Load order object
        $order_wrapper = entity_metadata_wrapper('commerce_order', $order);
        // Add line_item to the order
        $order_wrapper->commerce_line_items[] = $line_item;
        // Save order. This will fill the empty field_data_commerce_line_items
        commerce_order_save($order);
    }
    
  }
  drupal_exit();
}