From f9ccb51551943b2e841c64aef1f7eb6e12be2521 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 161ff159a2df9..12bb78b0c75ad 100644
--- a/app/code/Magento/Quote/Model/ResourceModel/Quote/Item/Collection.php
+++ b/app/code/Magento/Quote/Model/ResourceModel/Quote/Item/Collection.php
@@ -272,6 +272,10 @@ protected function _assignProducts()
      */
     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);