Remove queued query

lib/protocol/Protocol.js

@@ -336,6 +336,14 @@ Protocol.prototype._dequeue = function(sequence) {
     return;
   }
 
+  if (sequence !== this._queue[0]) {
+    var idx = this._queue.indexOf(sequence);
+    if (idx > 0) {
+      this._queue.splice(idx, 1);
+    }
+    return;
+  }
+
   this._queue.shift();
 
   var sequence = this._queue[0];

lib/protocol/sequences/Query.js

@@ -24,12 +24,29 @@ function Query(options, callback) {
   this._fields    = [];
   this._index     = 0;
   this._loadError = null;
+  this._started = false;
 }
 
 Query.prototype.start = function() {
+  this._started = true;
   this.emit('packet', new Packets.ComQueryPacket(this.sql));
 };
 
+Query.prototype.started = function() {
+  return this._started;
+};
+
+Query.prototype.ended = function() {
+  return this._ended;
+};
+
+Query.prototype.dequeue = function() {
+  if (this._started) {
+    throw new Error('Query already started.');
+  }
+  this.end();
+};
+
 Query.prototype.determinePacket = function determinePacket(byte, parser) {
   var resultSet = this._resultSet;