错误1115（42000）：未知字符集：'utf8mb4' [英] ERROR 1115 (42000): Unknown character set: 'utf8mb4'

问题描述

我有一个MySQL转储，我试图恢复：

I have a MySQL dump, which I tried to restore with:

mysql -u"username" -p"password" --host="127.0.0.1" mysql_db < mysql_db

但是，这引发了一个错误：

However, this threw an error:

ERROR 1115 (42000) at line 3231: Unknown character set: 'utf8mb4'

b $ b

这是3231-3233行：

This is lines 3231-3233:

/*!50003 SET character_set_client  = utf8mb4 */ ;
/*!50003 SET character_set_results = utf8mb4 */ ;
/*!50003 SET collation_connection  = utf8mb4_general_ci */ ;

我使用MySQL 5.1.69。

I am using MySQL 5.1.69. How can I solve this error?

推荐答案

您的版本不支持该字符集，我相信这是 5.5.3 引入它。你应该将你的mysql升级到你用来导出这个文件的版本。

Your version does not support that character set, I believe it was 5.5.3 that introduced it. You should upgrade your mysql to the version you used to export this file.

错误是很清楚的：你在代码中设置了一个特定的字符集，但是你的mysql版本不支持它，因此不知道。

The error is then quite clear: you set a certain character set in your code, but your mysql version does not support it, and therefore does not know about it.

根据 https://dev.mysql.com/doc/refman/5.5/en/charset-unicode-utf8mb4.html ：

utf8mb4是utf8的超集

utf8mb4 is a superset of utf8

你可以只是让它utf8，闭上你的眼睛和希望，但这将取决于你的数据，我不会推荐它。

so maybe there is a chance you can just make it utf8, close your eyes and hope, but that would depend on your data, and I'd not recommend it.

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