   `creation_date` datetime NOT NULL COMMENT '创建时间',
   `modified_date` datetime NOT NULL COMMENT '上次修改时间',
   PRIMARY KEY (`id`)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='AB测试运行实例';
 
 CREATE TABLE `group_strategy` (
   `id` int(11) NOT NULL AUTO_INCREMENT,

  `content` text,
  `creation_date` datetime DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

CREATE TABLE `abtest_run` (
  `id` int(11) NOT NULL AUTO_INCREMENT COMMENT 'ID',

  `description` varchar(512) DEFAULT NULL COMMENT '描述',
  PRIMARY KEY (`id`),
  UNIQUE KEY `idx_name` (`name`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='AB测试内容';

CREATE TABLE `abtest_report` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
