diff --git a/doc/init.sql b/doc/init.sql
index 71800de9..69cbdc6f 100644
--- a/doc/init.sql
+++ b/doc/init.sql
@@ -53,8 +53,8 @@ CREATE TABLE `resource` (
   `extend_info` text NOT NULL,
   `resource_property` text NOT NULL,
   `resource_output` text,
-  `data_source_name` varchar(64) NOT NULL,
-  `data_source_argument` varchar(64) NOT NULL,
+  `data_source_name` varchar(64) DEFAULT NULL,
+  `data_source_argument` varchar(64) DEFAULT NULL,
   `data_source` text,
   `data_source_output` varchar(2048) DEFAULT NULL,
   `is_locked` tinyint(1) DEFAULT '0',