code: function names (columns, table, schema) {
      if (this.typecheck) t.typecheck('names', [columns, table, schema]);
  
      var result = [];
      for (var i=0; i < columns.length; i++) {
          result.push(this.name(columns[i],table,schema));
      }
  
      return result.join(',');
  }
docs: name,name,...