fix

upgrade-202104/2021-待升级说明.txt

@@ -9,7 +9,7 @@ CREATE TABLE `ec_e_exam_ip_limit` (
   `id` bigint(20) NOT NULL AUTO_INCREMENT,
   `exam_id` bigint(20) DEFAULT NULL COMMENT '¿¼ÊÔid',
   `ip` varchar(255) DEFAULT NULL COMMENT 'ip',
-  `limit_type` varchar(255) DEFAULT NULL,
+  `limit_type` varchar(50) DEFAULT NULL,
   `creation_time` datetime DEFAULT NULL,
   `update_time` datetime DEFAULT NULL,
   PRIMARY KEY (`id`),