How can I adding data to my MySQL mailserver database without getting a "Incorrect string value" error?

Hi all,
I'm configuring my mail server following the Linode tutorial Email with Postfix, Dovecot, and MySQL.

I installer MySQL 8.0.20 and followed the configuration instructions.

Everything is fine until I try to add data to the MySQL database.

I keep getting an error like

ERROR 1366 (HY000): Incorrect string value: '\xA4<b\xD4\xB3\x8F…' for column 'password' at row 1

I understand that should be a Unicode issue, but my database configuration seems to be ok:

+--------------------------+--------------------+ | Variable_name | Value | +--------------------------+--------------------+ | character_set_client | utf8mb4 | | character_set_connection | utf8mb4 | | character_set_database | utf8mb4 | | character_set_filesystem | binary | | character_set_results | utf8mb4 | | character_set_server | utf8mb4 | | character_set_system | utf8 | | collation_connection | utf8mb4_0900_ai_ci | | collation_database | utf8mb4_0900_ai_ci | | collation_server | utf8mb4_0900_ai_ci | +--------------------------+--------------------+

Can't guess how to fix the issue then. Is there anybody willing to help? :-)

Thanks in advance!

1 Reply

Linode Staff

Hey there -

I've not encountered this error myself, so I did some digging around online for you and found a few resources which might be able to help you out.

In both of the following links, it's suggested that your data needs to be UTF-8 encoded and that error suggests that it is not:

How to fix “Incorrect string value” errors?

INSERT gives Error Code: 1366. Incorrect string value

Here's a page that describes UTF-8 encoding:

UTF-8 Encoding

I hope this helps!


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