diff --git a/lib/database.js b/lib/database.js
index 2cdfa89..96e5f7f 100644
--- a/lib/database.js
+++ b/lib/database.js
@@ -65,6 +65,8 @@ Database.prototype = commands;
  */
 
 Database.prototype.selectDB = function(index){
+  // TODO: these should be their own objects
+  // that we can easily swap out in SELECT
   this.data = this.dbs[index] = this.dbs[index] || {};
   this.types = this._types[index] = this._types[index] || {};
 };