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

• 問題描述

  在Python使用pymysql出現如題錯誤：

  /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.")
  

• 解決方案

  MySQL中的“utf8”並不是真正的UTF-8。“utf8”只支持每個字符最多三個字節，而真正的UTF-8是每個字符最多四個字節。

  MySQL一直沒有修復這個bug，他們在2010年發佈了一個叫作“utf8mb4”的字符集，繞過了這個問題。

  MySQL中的utf8mb4是真正的utf8，所以用utf8mb4，不要用utf8這個別名。

• 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.