   `topic_id` int(11) NOT NULL DEFAULT '0',
   `user_id` int(11) NOT NULL DEFAULT '0',
   `create_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
-  `content` varchar(3000) NOT NULL DEFAULT '',
+  `content` TEXT NOT NULL DEFAULT '',
   PRIMARY KEY (`id`),
   KEY `index_topic_id` (`topic_id`),
   KEY `index_user_id` (`user_id`),

  PRIMARY KEY (`id`),
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  KEY `index_user_id` (`user_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;




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-- insert into topic VALUES(42,'123','123😟',3,'2016-02-27 22:44:23','2016-02-27 22:44:23','mubin',0,0,0,0,0,0,'','2016-02-27 22:44:23',1,0);