Warning: (3719, “‘utf8’ is currently an alias for the character set UTF8MB3, which will be replaced by UTF8MB4 in a future release. Please consider using UTF8MB4 in order to be unambiguous.”)

【1】本地版本 Mysql 8.0.12

创建表SQL：

DROP TABLE IF EXISTS students;
CREATE TABLE `students` (
  `sId` INT(20) UNSIGNED NOT NULL AUTO_INCREMENT,
  `sName` VARCHAR(100) NOT NULL,
  `sAge` INT(10) NOT NULL,
  `sAddr` VARCHAR(200) DEFAULT NULL,
  `sGrade` INT(10) DEFAULT NULL,
  `sStuId` VARCHAR(20) DEFAULT NULL,
  `sSex` INT(10) UNSIGNED DEFAULT NULL,
  PRIMARY KEY (`sId`),
  INDEX `idx_name` (`sName`)
) ENGINE=INNODB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8

执行提示警告3719 内容：

Warning: (3719, “‘utf8’ is currently an alias for the character set UTF8MB3, which will be replaced by UTF8MB4 in a future release. Please consider using UTF8MB4 in order to be unambiguous.”)

翻译：

警告：(3719)，“UTF 8”目前是字符集UTF8MB3的别名，在将来的版本中将被UTF8MB4替换。请考虑使用UTF8MB4，以便明确无误。“)

【2】解决方案

（1）修改my.ini

[client]
port=3306
default-character-set=utf8mb4
[mysqld]
port=3306
character_set_server=utf8mb4
#解压目录
basedir=D:\MySql\mysql-8.0.12-winx64\bin
#解压目录下data目录
datadir=D:\MySql\mysql-8.0.12-winx64\data
federated
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES

（2）修改创建表语句

DROP TABLE IF EXISTS students;
CREATE TABLE `students` (
  `sId` INT(20) UNSIGNED NOT NULL AUTO_INCREMENT,
  `sName` VARCHAR(100) NOT NULL,
  `sAge` INT(10) NOT NULL,
  `sAddr` VARCHAR(200) DEFAULT NULL,
  `sGrade` INT(10) DEFAULT NULL,
  `sStuId` VARCHAR(20) DEFAULT NULL,
  `sSex` INT(10) UNSIGNED DEFAULT NULL,
  PRIMARY KEY (`sId`),
  INDEX `idx_name` (`sName`)
) ENGINE=INNODB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8mb4

修改默认字符集 ：DEFAULT CHARSET=utf8mb4

不再提示此警告内容。

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