From b42b97f96f53870abb6fba3d4fd8efbef73b313d Mon Sep 17 00:00:00 2001
From: root <jmrenouard@gmail.com>
Date: Mon, 8 Aug 2016 17:40:53 +0200
Subject: [PATCH] #227 Stopping MySQL tuner when SELECT VERSION doesnt return
 any value. This indicates that user doent get enough privileges

---
 mysqltuner.pl | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/mysqltuner.pl b/mysqltuner.pl
index c08e91c..9655788 100755
--- a/mysqltuner.pl
+++ b/mysqltuner.pl
@@ -945,6 +945,10 @@ sub arr2hash {
 sub get_all_vars {
     # We need to initiate at least one query so that our data is useable
     $dummyselect = select_one "SELECT VERSION()";
+    if (not defined($dummyselect) or $dummyselect== "") {
+      badprint "You probably doesn't get enough privileges for running MySQLTuner ..."
+      exit(256);
+    }
     $dummyselect =~ s/(.*?)\-.*/$1/;
     debugprint "VERSION: " . $dummyselect . "";
     $result{'MySQL Client'}{'Version'} = $dummyselect;