read

# File activerecord/lib/active_record/connection_adapters/schema_cache.rb, line 244
      def self.read(filename, &block)
        if File.extname(filename) == ".gz"
          Zlib::GzipReader.open(filename) { |gz|
            yield gz.read
          }
        else
          yield File.read(filename)
        end
      end