> If you delete a row with a BLOB, does it automatically lo_unlink
> the blob?
No, I believe it does not - you need to run an 'lo_delete' command
separately. In Postgres 7.1+ though, I think it's easier to just use the
'bytea' binary large string type. It's there in 7.1, but 7.2 has introduced
many new operators for it.
Chris