# File lib/active_record/connection_adapters/abstract_mysql_adapter.rb, line 133
      def initialize(connection, logger, connection_options, config)
        super(connection, logger)
        @connection_options, @config = connection_options, config
        @quoted_column_names, @quoted_table_names = {}, {}

        if config.fetch(:prepared_statements) { true }
          @visitor = Arel::Visitors::MySQL.new self
        else
          @visitor = BindSubstitution.new self
        end
      end