MAGETWO-88094: [ForwardPort] Configurable product reindex too slow for big amount of options

Author: mslabko

app/code/Magento/ConfigurableProduct/Model/ResourceModel/Product/Indexer/Price/Configurable.php

@@ -133,6 +133,10 @@ protected function _applyConfigurableOption()
             ['le' => $this->getTable('catalog_product_entity')],
             'le.' . $linkField . ' = l.parent_id',
             ['parent_id' => 'entity_id']
+        )->join(
+            ['i' => $this->_getDefaultFinalPriceTable()],
+            'le.entity_id = i.entity_id',
+            []
         );
 
         $select = $connection->select();