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

創建表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

執行提示警告3719 內容：

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.”)

翻譯：

警告：(3719)，“UTF 8”目前是字符集UTF8MB3的別名，在將來的版本中將被UTF8MB4替換。請考慮使用UTF8MB4，以便明確無誤。“)

【2】解決方案

（1）修改my.ini

[client]
port=3306
default-character-set=utf8mb4
[mysqld]
port=3306
character_set_server=utf8mb4
#解壓目錄
basedir=D:\MySql\mysql-8.0.12-winx64\bin
#解壓目錄下data目錄
datadir=D:\MySql\mysql-8.0.12-winx64\data
federated
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES

（2）修改創建表語句

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

修改默認字符集 ：DEFAULT CHARSET=utf8mb4

不再提示此警告內容。

 

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