From caa785ec592e15d964e2f51cfce49217761989fb Mon Sep 17 00:00:00 2001
From: git001 <git001@users.noreply.github.com>
Date: Mon, 28 Nov 2016 20:39:47 +0100
Subject: [PATCH] Fix Argument "NULL" isn't numeric

Argument "NULL" isn't numeric in numeric ge (>=) at mysqltuner.pl line 288 (#1)
    (W numeric) The indicated string was fed as an argument to an operator
    that expected a numeric value instead.  If you're fortunate the message
    will identify which operator was so unfortunate.
[--]  +-- ROWS : 0
Argument "NULL" isn't numeric in numeric eq (==) at mysqltuner.pl line 343 (#1)
    (W numeric) The indicated string was fed as an argument to an operator
    that expected a numeric value instead.  If you're fortunate the message
    will identify which operator was so unfortunate.
[--]  +-- ENGIN : 0 (NULL)
Argument "NULL" isn't numeric in numeric lt (<) at mysqltuner.pl line 3847 (#1)
---
 mysqltuner.pl | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/mysqltuner.pl b/mysqltuner.pl
index b78a9d0..9934100 100755
--- a/mysqltuner.pl
+++ b/mysqltuner.pl
@@ -319,6 +319,9 @@ sub hr_bytes {
 # Calculates the parameter passed in bytes, then rounds it to the nearest integer
 sub hr_bytes_rnd {
     my $num = shift;
+    
+    return "0B" if $num eq "NULL" ;
+    
     if ( $num >= ( 1024**3 ) ) {       #GB
         return int( ( $num / ( 1024**3 ) ) ) . "G";
     }
@@ -355,6 +358,7 @@ sub percentage {
     my $value = shift;
     my $total = shift;
     $total = 0 unless defined $total;
+    $total = 0 if $total eq "NULL";
     return 100, 00 if $total == 0;
     return sprintf( "%.2f", ( $value * 100 / $total ) );
 }
@@ -5450,7 +5454,7 @@ sub mysql_databases {
             )
           ) . ")";
         badprint "Index size is larger than data size for $dbinfo[0] \n"
-          if $dbinfo[2] < $dbinfo[3];
+          if ( $dbinfo[2] ne 'NULL' ) and ( $dbinfo[3] ne 'NULL' ) and ( $dbinfo[2] < $dbinfo[3] );
         badprint "There are " . $dbinfo[5] . " storage engines. Be careful. \n"
           if $dbinfo[5] > 1;
         $result{'Databases'}{ $dbinfo[0] }{'Rows'}       = $dbinfo[1];