binary_to_string

# File activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb, line 86
        def self.binary_to_string(value)
          # In each case, check if the value actually is escaped PostgreSQL bytea output
          # or an unescaped Active Record attribute that was just written.
          if PGconn.respond_to?(:unescape_bytea)
            self.class.module_eval do
              define_method(:binary_to_string) do |value|
                if value =~ /\\\d{3}/
                  PGconn.unescape_bytea(value)
                else
                  value
                end
              end
            end
          else
            self.class.module_eval do
              define_method(:binary_to_string) do |value|
                if value =~ /\\\d{3}/
                  result = ''
                  i, max = 0, value.size
                  while i < max
                    char = value[i]
                    if char == ?\\
                      if value[i+1] == ?\\
                        char = ?\\
                        i += 1
                      else
                        char = value[i+1..i+3].oct
                        i += 3
                      end
                    end
                    result << char
                    i += 1
                  end
                  result
                else
                  value
                end
              end
            end
          end
          self.class.binary_to_string(value)
        end