# File lib/active_record/connection_adapters/mysql_adapter.rb, line 47
    def self.require_mysql
      # Include the MySQL driver if one hasn't already been loaded
      unless defined? Mysql
        begin
          require_library_or_gem 'mysql'
        rescue LoadError => cannot_require_mysql
          # Use the bundled Ruby/MySQL driver if no driver is already in place
          begin
            ActiveSupport::Deprecation.warn "You're using the Ruby-based MySQL library that ships with Rails. This library will be REMOVED FROM RAILS 2.2. Please switch to the offical mysql gem: `gem install mysql`", caller

            require 'active_record/vendor/mysql'
          rescue LoadError
            raise cannot_require_mysql
          end
        end
      end

      # Define Mysql::Result.all_hashes
      MysqlCompat.define_all_hashes_method!
    end