Warning: (3719, "'utf8' is currently an alias for the character set UTF8MB3, but will be an alias

• 问题描述

  在Python使用pymysql出现如题错误：

  /home/data/anaconda3/lib/python3.7/site-packages/pymysql/cursors.py:170: Warning: (3719, "'utf8' is currently an alias for the character set UTF8MB3, but will be an alias for UTF8MB4 in a future release. Please consider using UTF8MB4 in order to be unambiguous.")
  

• 解决方案

  MySQL中的“utf8”并不是真正的UTF-8。“utf8”只支持每个字符最多三个字节，而真正的UTF-8是每个字符最多四个字节。

  MySQL一直没有修复这个bug，他们在2010年发布了一个叫作“utf8mb4”的字符集，绕过了这个问题。

  MySQL中的utf8mb4是真正的utf8，所以用utf8mb4，不要用utf8这个别名。

• References

1. Warning | 3719 | ‘utf8’ is currently an alias for the character set UTF8MB3, but will be an alias for UTF8MB4 in a future release. Please consider using UTF8MB4 in order to be unambiguous.