Logs, unless specifically being told otherwise, are assumed to be in text format. Even if they may contain binary blobs (which are normally unexpected, and not

Logs, unless specifically being told otherwise, are assumed to be in text format. Even if they may contain binary blobs (which are normally unexpected, and not really conformant), they are still supposed to be text format. Surely you can store anything on a bytea. However, that won't take you very far if you want to query the logs (partially or completely) from the database --which is indeed extremely useful. In any case, Postgres always strived for compliance. And here, it is not accepting a UTF-8 valid character, hence is being non-compliant.