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 23646)
+++ /branches/version-2_13-dev/html/install/sql/create_table_mysql.sql	(revision 23652)
@@ -314,5 +314,5 @@
     classcategory_id2 int NOT NULL DEFAULT 0,
     product_type_id int NOT NULL DEFAULT 0,
-    product_code text NOT NULL,
+    product_code text,
     stock numeric,
     stock_unlimited smallint NOT NULL DEFAULT 0,
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 23646)
+++ /branches/version-2_13-dev/html/install/sql/create_table_pgsql.sql	(revision 23652)
@@ -314,5 +314,5 @@
     classcategory_id2 int NOT NULL DEFAULT 0,
     product_type_id int NOT NULL DEFAULT 0,
-    product_code text NOT NULL,
+    product_code text,
     stock numeric,
     stock_unlimited smallint NOT NULL DEFAULT 0,