   `alert_time` datetime NOT NULL COMMENT '告警时间',
   `category` varchar(64) NOT NULL COMMENT '告警分类:network/business/system/exception -alert',
   `type` varchar(64) NOT NULL COMMENT '告警类型:error/warning',
-  `content` text NOT NULL COMMENT '告警内容',
+  `content` longtext NOT NULL COMMENT '告警内容',
   `metric` varchar(128) NOT NULL COMMENT '告警指标',
   `creation_date` datetime NOT NULL COMMENT '数据插入时间',
   PRIMARY KEY (`id`)

  `status` smallint NOT NULL COMMENT '数据状态',
  `creation_date` datetime NOT NULL COMMENT '数据插入时间',
  PRIMARY KEY (`id`),
  KEY IX_period_city_minute (period,city,minute_order),
  KEY IX_period_operator_minute (period,network,minute_order),
  KEY IX_period_network_minute (period,network,minute_order),
  KEY IX_period_version_minute (period,app_version,minute_order),
  KEY IX_period_connnect_minute (period,connnect_type,minute_order),
  KEY IX_period_platform_minute (period,platform,minute_order),
  KEY IX_period_code_minute (period,code,minute_order)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='app基本数据';

  `data` blob,
  `creation_date` datetime DEFAULT NULL,
  PRIMARY KEY (`id`),
  KEY `period_name_key` (`report_period`,`report_name`,`index_key`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

CREATE TABLE `alteration` (
