to_sql

# File activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb, line 26
      def to_sql
        column_sql = "#{base.quote_column_name(name)} #{sql_type}"
        column_options = {}
        column_options[:null] = null unless null.nil?
        column_options[:default] = default unless default.nil?
        add_column_options!(column_sql, column_options) unless type.to_sym == :primary_key
        column_sql
      end