From c5e507cd9c448486f1658452550ccdf6482e2744 Mon Sep 17 00:00:00 2001
From: Johannes 'fish' Ziemke <github@freigeist.org>
Date: Thu, 2 May 2013 16:55:47 +0200
Subject: [PATCH] Never submit empty queries.

---
 web/static/js/graph.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/web/static/js/graph.js b/web/static/js/graph.js
index 55649ca56..385d78730 100644
--- a/web/static/js/graph.js
+++ b/web/static/js/graph.js
@@ -275,6 +275,9 @@ Prometheus.Graph.prototype.decreaseEnd = function() {
 
 Prometheus.Graph.prototype.submitQuery = function() {
   var self = this;
+  if (!self.expr.val()) {
+    return
+  }
 
   self.spinner.show();
   self.evalStats.empty();