add_column_options!

# File activerecord/lib/active_record/connection_adapters/abstract/schema_creation.rb, line 83
          def add_column_options!(sql, options)
            sql << " DEFAULT #{quote_value(options[:default], options[:column])}" if options_include_default?(options)
            # must explicitly check for :null to allow change_column to work on migrations
            if options[:null] == false
              sql << " NOT NULL"
            end
            if options[:auto_increment] == true
              sql << " AUTO_INCREMENT"
            end
            sql
          end