                             expire     : if ttl then expire_time(ttl)
                         cb     : cb
                 else
-                    # blob already in the DB, so see if we need to change the expire time
+                    dbg("blob already in the DB, so see if we need to change the expire time")
                     @_extend_blob_ttl
                         expire : rows[0].expire
                         ttl    : opts.ttl

                        rows = x.rows; cb(err)
            (cb) =>
                if rows.length == 0 and opts.compress
                    # compression requested and blob not already saved, so we compress blob
                    switch opts.compress
                        when 'gzip'
                            zlib.gzip opts.blob, {level:opts.level}, (err, blob) =>

                    cb()
            (cb) =>
                if rows.length == 0
                    dbg("nothing in DB, so we insert the blob.")
                    ttl = opts.ttl
                    dbg("blob='#{opts.blob}'; type=#{typeof(opts.blob)}")
                    @_query
                        query  : "INSERT INTO blobs"
                        values :
                            id         : opts.uuid
                            blob       : '\\x'+opts.blob.toString('hex')
                            project_id : opts.project_id
                            count      : 0
                            size       : opts.blob.length
