# File lib/active_record/connection_adapters/mysql_adapter.rb, line 781
        def add_column_sql(table_name, column_name, type, options = {})
          add_column_sql = "ADD #{quote_column_name(column_name)} #{type_to_sql(type, options[:limit], options[:precision], options[:scale])}"
          add_column_options!(add_column_sql, options)
          add_column_position!(add_column_sql, options)
          add_column_sql
        end