From 8310be3d7e33f7532dc4765c1a19a175f891eb00 Mon Sep 17 00:00:00 2001
From: Sean Templeton <sean@templeton.io>
Date: Mon, 9 Jul 2018 22:55:49 -0500
Subject: [PATCH] Prevent running SQL query on every item in the database when
 the quote is empty

---
 .../Quote/Model/ResourceModel/Quote/Item/Collection.php       | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/app/code/Magento/Quote/Model/ResourceModel/Quote/Item/Collection.php b/app/code/Magento/Quote/Model/ResourceModel/Quote/Item/Collection.php
index 0487d7e46eb26..1938d7bd2780e 100644
--- a/app/code/Magento/Quote/Model/ResourceModel/Quote/Item/Collection.php
+++ b/app/code/Magento/Quote/Model/ResourceModel/Quote/Item/Collection.php
@@ -309,6 +309,10 @@ private function addTierPriceData(ProductCollection $productCollection)
      */
     private function removeItemsWithAbsentProducts()
     {
+        if (count($this->_productIds) === 0) {
+            return;
+        }
+
         $productCollection = $this->_productCollectionFactory->create()->addIdFilter($this->_productIds);
         $existingProductsIds = $productCollection->getAllIds();
         $absentProductsIds = array_diff($this->_productIds, $existingProductsIds);