- Updated constraints on the catalog_compare_list table

Author: Prabhu Ram

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

@@ -586,16 +586,15 @@
         <constraint xsi:type="primary" referenceId="PRIMARY">
             <column name="list_id"/>
         </constraint>
-
+        <constraint xsi:type="unique" referenceId="CATALOG_COMPARE_LIST_CUSTOMER_ID">
+            <column name="customer_id"/>
+        </constraint>
         <constraint xsi:type="foreign" referenceId="CATALOG_COMPARE_LIST_CUSTOMER_ID_CUSTOMER_ENTITY_ENTITY_ID"
                     table="catalog_compare_list" column="customer_id" referenceTable="customer_entity"
                     referenceColumn="entity_id" onDelete="CASCADE"/>
         <index referenceId="CATALOG_COMPARE_LIST_LIST_ID_MASK" indexType="btree">
             <column name="list_id_mask"/>
         </index>
-        <index referenceId="CATALOG_COMPARE_LIST_CUSTOMER_ID_CUSTOMER_ENTITY_CUSTOMER_ID" indexType="btree">
-            <column name="customer_id"/>
-        </index>
     </table>
     <table name="catalog_product_website" resource="default" engine="innodb"
            comment="Catalog Product To Website Linkage Table">

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

@@ -1132,12 +1132,12 @@
             "customer_id": true
         },
         "index": {
-            "CATALOG_COMPARE_LIST_LIST_ID_MASK": true,
-            "CATALOG_COMPARE_LIST_CUSTOMER_ID": true
+            "CATALOG_COMPARE_LIST_LIST_ID_MASK": true
         },
         "constraint": {
             "PRIMARY": true,
+            "CATALOG_COMPARE_LIST_CUSTOMER_ID": true,
             "CATALOG_COMPARE_LIST_CUSTOMER_ID_CUSTOMER_ENTITY_ENTITY_ID": true
         }
     }
-}
+}