When running "ALTER TABLE" queries on a large table I discovered the given timeout was not respected. After 5 seconds I got an error: Mariaex.Protocol (#PID<0.3419.0>) disconnected: ** (Mariaex.Error) [tcp] recv failed with: :timeout

I did not try it with a direct connection to Mariaex, in this case I perform the queries via Ecto (and thus DBConnection).
Ecto.Adapters.SQL.query!(MyApp.Repo, "select sleep(6)", [], timeout: 7000)

I traced the given timeout option through ecto and db_connection, but MariaEx.Protocol is where its get lost., in handle_execute to be precise.

I don't know what the correct solution should be so I have no pull request for you, sorry.