Error Code: 1071. Specified key was too long;

时间 2019-11-05

标签 error code specified key long 繁體版

原文原文链接

错误信息mysql

Error Code: 1071. Specified key was too long; max key length is 767 bytessql

表结构 ide

CREATE TABLE yundou_data_system.`object_event` (
  `id` int(11) unsigned NOT NULL AUTO_INCREMENT,
  `object_id` int(11) unsigned NOT NULL DEFAULT '0',
  `event_name` varchar(256) NOT NULL DEFAULT '',
  `create_time` int(11) unsigned NOT NULL DEFAULT '0',
  `status` tinyint(1) unsigned NOT NULL DEFAULT '1',
  PRIMARY KEY (`id`),
  UNIQUE KEY `unq_event_name` (`event_name`),
  KEY `idx_object_id` (`object_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='对象事件表'

缘由
mysql的varchar主键只支持不超过767个字节或者768/2=384个双字节或者767/3=255个三字节的字段而GBK是双字节的，UTF8是三字节的。code

解决方案对象

`event_name` varchar(255) NOT NULL DEFAULT '',