    # 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
                ActiveRecord::Base.logger.info(
                  "WARNING: You're using the Ruby-based MySQL library that ships with Rails. This library is not suited for production. " +
                  "Please install the C-based MySQL library instead (gem install mysql)."
                ) if ActiveRecord::Base.logger

                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