#38315 fixes ( keep prev. index to prevent regression )

Author: rostilos

app/code/Magento/Catalog/etc/db_schema.xml

@@ -1,8 +1,8 @@
 <?xml version="1.0"?>
 <!--
 /**
- * Copyright © Magento, Inc. All rights reserved.
- * See COPYING.txt for license details.
+ * Copyright 2018 Adobe
+ * All Rights Reserved.
  */
 -->
 <schema xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
@@ -132,6 +132,9 @@
             <column name="attribute_id"/>
             <column name="store_id"/>
         </constraint>
+        <index referenceId="CATALOG_PRODUCT_ENTITY_INT_ATTRIBUTE_ID" indexType="btree">
+            <column name="attribute_id"/>
+        </index>
         <index referenceId="CATALOG_PRODUCT_ENTITY_INT_ATTRIBUTE_ID_ENTITY_ID" indexType="btree">
             <column name="attribute_id"/>
             <column name="entity_id"/>

app/code/Magento/Catalog/etc/db_schema_whitelist.json

@@ -68,6 +68,7 @@
             "value": true
         },
         "index": {
+            "CATALOG_PRODUCT_ENTITY_INT_ATTRIBUTE_ID": true,
             "CATALOG_PRODUCT_ENTITY_INT_ATTRIBUTE_ID_ENTITY_ID": true,
             "CATALOG_PRODUCT_ENTITY_INT_STORE_ID": true,
             "CATALOG_PRODUCT_ENTITY_INT_ATTRIBUTE_ID_STORE_ID_VALUE": true