Mysql全文索引实现模糊查询

MySQL 5.7.6开始，MySQL内置了ngram全文解析器，用来支持中、日、韩文的分词

启动方法

配置mysql的ngram，打开mysql server的配置文件，编辑在[mysqld]下面加入这样的配置

# vim /etc/my.cnf
[mysqld]
ngram_token_size=2

查看是否开启

mysql> show variables like 'ngram_token_size%';
+------------------+-------+
| Variable_name    | Value |
+------------------+-------+
| ngram_token_size | 1     |
+------------------+-------+

演示数据表

CREATE TABLE `t_testfulltext` (
  `id` int(11) unsigned NOT NULL AUTO_INCREMENT,
  `name` varchar(128) DEFAULT NULL,
  `data` int(11) DEFAULT NULL,
  PRIMARY KEY (`id`),
  FULLTEXT KEY `ft_index` (`name`) /*!50100 WITH PARSER `ngram` */ 
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

执行语句

SELECT * FROM t_testfulltext WHERE MATCH (name) AGAINST ('今天');

 

参考：https://cloud.tencent.com/developer/article/1634247?areaSource=&traceId=