diff --git a/build/database/install/measure_task.sql b/build/database/install/measure_task.sql
index 8697782..e5b474a 100644
--- a/build/database/install/measure_task.sql
+++ b/build/database/install/measure_task.sql
@@ -25,12 +25,12 @@ DROP TABLE IF EXISTS `measure_task`;
 CREATE TABLE `measure_task` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
   `ne_type` varchar(16) DEFAULT NULL,
-  `ne_ids` longtext CHARACTER SET utf8mb4 COLLATE utf8mb4_bin DEFAULT '[]',
-  `kpi_set` longtext CHARACTER SET utf8mb4 COLLATE utf8mb4_bin DEFAULT '[]',
+  `ne_ids` text CHARACTER SET utf8mb4 COLLATE utf8mb4_bin DEFAULT NULL,
+  `kpi_set` text CHARACTER SET utf8mb4 COLLATE utf8mb4_bin DEFAULT NULL,
   `start_time` varchar(32) DEFAULT NULL,
   `end_time` varchar(32) DEFAULT NULL,
-  `periods` longtext CHARACTER SET utf8mb4 COLLATE utf8mb4_bin DEFAULT '[]',
-  `schedule` longtext CHARACTER SET utf8mb4 COLLATE utf8mb4_bin DEFAULT '[]',
+  `periods` text CHARACTER SET utf8mb4 COLLATE utf8mb4_bin DEFAULT NULL,
+  `schedule` text CHARACTER SET utf8mb4 COLLATE utf8mb4_bin DEFAULT NULL,
   `granul_option` enum('15M','30M','60M','24H') NOT NULL DEFAULT '15M',
   `status` enum('Inactive','Active','Suspend','Deleted') NOT NULL DEFAULT 'Inactive',
   `account_id` varchar(32) DEFAULT NULL,