# File lib/active_record/connection_adapters/mysql_adapter.rb, line 220
      def initialize(connection, logger, connection_options, config)
        super(connection, logger)
        @connection_options, @config = connection_options, config
        @quoted_column_names, @quoted_table_names = {}, {}
        @statements = {}
        @statements = StatementPool.new(@connection,
                                        config.fetch(:statement_limit) { 1000 })
        @client_encoding = nil
        connect
      end