Index: branches/version-2_13-dev/html/install/sql/create_table_mysql.sql
===================================================================
--- branches/version-2_13-dev/html/install/sql/create_table_mysql.sql	(revision 23640)
+++ branches/version-2_13-dev/html/install/sql/create_table_mysql.sql	(revision 23641)
@@ -329,5 +329,5 @@
     del_flg smallint NOT NULL DEFAULT 0,
     PRIMARY KEY (product_class_id),
-    UNIQUE (product_id, classcategory_id1, classcategory_id2)
+    CONSTRAINT dtb_products_class_unique_key UNIQUE (product_id, classcategory_id1, classcategory_id2)
 );
 
Index: branches/version-2_13-dev/html/install/sql/create_table_pgsql.sql
===================================================================
--- branches/version-2_13-dev/html/install/sql/create_table_pgsql.sql	(revision 23640)
+++ branches/version-2_13-dev/html/install/sql/create_table_pgsql.sql	(revision 23641)
@@ -329,5 +329,5 @@
     del_flg smallint NOT NULL DEFAULT 0,
     PRIMARY KEY (product_class_id),
-    UNIQUE (product_id, classcategory_id1, classcategory_id2)
+    CONSTRAINT dtb_products_class_unique_key UNIQUE (product_id, classcategory_id1, classcategory_id2) /* キー名競合回避 */
 );