ruby check loaded postcodes

=begin
        count = 0
        obj.get(range: "bytes=0-1027") do |chunk|
          # check whether this file has already been loaded into os_address table
          # chunk.lines.first.split(',')w
          line = chunk.lines.first
          # line = "\"" + chunk.lines.first unless line[0] == "\""

          file_first_line = CSV.parse(line, :liberal_parsing => true)
          pc = file_first_line[0][65]
          puts "checking postcode #{pc} from file #{obj.key}"

          vals = conn.exec_query("select count(*) from os_address where POSTCODE = '#{pc}';")
          count = vals[0]['count']
          if vals[0]['count'].zero?
            puts "postcode #{pc} not found in file #{obj.key}"
          else
            puts "Skipping #{obj.key}"
          end
          break
        end
        if count.zero?
=end