diff --git a/core/core-backend/src/main/resources/db/desktop/V2.10.1__ddl.sql b/core/core-backend/src/main/resources/db/desktop/V2.10.1__ddl.sql
index 076dc4e9e8..e25e136490 100644
--- a/core/core-backend/src/main/resources/db/desktop/V2.10.1__ddl.sql
+++ b/core/core-backend/src/main/resources/db/desktop/V2.10.1__ddl.sql
@@ -1,5 +1,5 @@
 ALTER TABLE `visualization_outer_params_info`
     ADD COLUMN `required` tinyint(1) DEFAULT 0 COMMENT '是否必填',
-ADD COLUMN `default_value` longtext NULL COMMENT '默认值 JSON格式',
+ADD COLUMN `default_value` varchar(255) DEFAULT NULL COMMENT '默认值 JSON格式',
 ADD COLUMN `enabled_default` tinyint(1) NULL DEFAULT 0 COMMENT '是否启用默认值';
 update visualization_outer_params_info set required =0;
diff --git a/core/core-backend/src/main/resources/db/migration/V2.10.1__ddl.sql b/core/core-backend/src/main/resources/db/migration/V2.10.1__ddl.sql
index 076dc4e9e8..e25e136490 100644
--- a/core/core-backend/src/main/resources/db/migration/V2.10.1__ddl.sql
+++ b/core/core-backend/src/main/resources/db/migration/V2.10.1__ddl.sql
@@ -1,5 +1,5 @@
 ALTER TABLE `visualization_outer_params_info`
     ADD COLUMN `required` tinyint(1) DEFAULT 0 COMMENT '是否必填',
-ADD COLUMN `default_value` longtext NULL COMMENT '默认值 JSON格式',
+ADD COLUMN `default_value` varchar(255) DEFAULT NULL COMMENT '默认值 JSON格式',
 ADD COLUMN `enabled_default` tinyint(1) NULL DEFAULT 0 COMMENT '是否启用默认值';
 update visualization_outer_params_info set required =0;