MYSQL报错：#1089 - Incorrect prefix key; the used key part isn't a string

MYSQL报错：#1089 - Incorrect prefix key; the used key part isn‘t a string, the used length is longer than the key part, or the storage engine doesn‘t support unique prefix keys

解决办法：

添加索引时大小不要设置即可

MYSQL报错：#1089 - Incorrect prefix key; the used key part isn't a string

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