>> Sorry, it was inaccurate phrase. I mean "if the conversion to this
>> encoding is not avaliable". For example, when we have database in
>> EUC_JP and log_encoding set to Latin1. I think that we can even fall
>> back to UTF-8 as we can convert all encodings to it (with some
>> exceptions that you noticed).
> So, what you wanted to say here is:
>
> "If the conversion to this encoding is not avaliable then fall back to
> UTF-8"
>
> Am I correct?
>
> Also is it possible to completely disable the feature?
>
Yes, you're. I think it could be disabled by setting log_encoding='',
but if the parameter is missing then the feature should be enabled (with
UTF-8).