# File lib/active_record/connection_adapters/mysql2_adapter.rb, line 410
      def columns(table_name, name = nil)
        sql = "SHOW FIELDS FROM #{quote_table_name(table_name)}"
        columns = []
        result = execute(sql, :skip_logging)
        result.each(:symbolize_keys => true, :as => :hash) { |field|
          columns << Mysql2Column.new(field[:Field], field[:Default], field[:Type], field[:Null] == "YES")
        }
        columns
      end