MC-32278: Position sort does not work in GraphQl.

- order by second

Author: cpartica

app/code/Magento/Catalog/Model/ResourceModel/Product/Collection.php

@@ -1717,7 +1717,7 @@ public function addAttributeToSort($attribute, $dir = self::SORT_ORDER_ASC)
             // optimize if using cat index
             $filters = $this->_productLimitationFilters;
             if (isset($filters['category_id']) || isset($filters['visibility'])) {
-                $this->getSelect()->order('cat_index.position ' . $dir);
+                $this->getSelect()->order(['cat_index.position ' . $dir, 'e.entity_id ' . $dir]);
             } else {
                 $this->getSelect()->order('e.entity_id ' . $dir);
             }

app/code/Magento/CatalogGraphQl/Model/Resolver/Products/Query/Search.php

@@ -121,8 +121,6 @@ public function getResult(
         $searchCriteria->setCurrentPage(0);
         $itemsResults = $this->search->search($searchCriteria);
 
-        $searchCriteria->setPageSize($realPageSize)->setCurrentPage($realCurrentPage);
-
         //Create copy of search criteria without conditions (conditions will be applied by joining search result)
         $searchCriteriaCopy = $this->searchCriteriaFactory->create()
             ->setSortOrders($searchCriteria->getSortOrders())
@@ -144,7 +142,7 @@ public function getResult(
                 }
             }
         }
-
+        //add root category or all root category children if category_id is not defined
         if ($categoryGroup) {
             $searchCriteriaCopy->setFilterGroups([$categoryGroup]);
         }