upgrade for multi-tenancy

database/upgrade/upg_sys_user.sql

@@ -209,4 +209,7 @@ ALTER TABLE `sys_user` MODIFY COLUMN `email` varchar(64) CHARACTER SET utf8mb4 C
 ALTER TABLE `sys_user` MODIFY COLUMN `phonenumber` varchar(16) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT '' COMMENT '手机号码' AFTER `email`;
 ALTER TABLE `sys_user` MODIFY COLUMN `remark` varchar(500) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT '' COMMENT '备注' AFTER `update_time`;
 
+-- multi-tenancy
+ALTER TABLE `tenants_db`.`sys_user` ADD COLUMN `tenant_id` bigint(20) NULL DEFAULT NULL COMMENT 'Tenant ID' AFTER `dept_id`;
+
 SET FOREIGN_KEY_CHECKS=1;