Study note

about query's promise

Author: edisonz0718

lib/query.js

@@ -11,7 +11,8 @@ var util = require('util');
 
 var Result = require('./result');
 var utils = require('./utils');
-
+//Ze : Although Query itself doesn't return a promise. But it implements promise functions below.
+// So we can use fromPromise on query.
 var Query = function(config, values, callback) {
   // use of "new" optional
   if(!(this instanceof Query)) { return new Query(config, values, callback); }