Fix for issue 750: brianc#750

Author: ngervasi

lib/query.js

@@ -11,7 +11,7 @@ var Query = function(config, values, callback) {
   config = utils.normalizeQueryConfig(config, values, callback);
 
   this.text = config.text;
-  this.values = config.values;
+  this.values = config.values.slice();
   this.rows = config.rows;
   this.types = config.types;
   this.name = config.name;