Use of uninitialized value $opt{"myisamstat"} in numeric eq (==)

#702

Author: jmrenouard

mysqltuner.pl

@@ -235,10 +235,9 @@ package main;
   if ( $opt{nopfstat} == 1 );    # Don't print performance schema information
 $opt{idxstat} = 0 if ( $opt{noidxstat} == 1 );   # Don't print index information
 $opt{structstat} = 0
-  if ( $opt{nostructstat} == 1 );    # Don't print table struct information
-$opt{myisamstat} = 0
-  if ( $opt{nomyisamstat} == 1 );    # Don't print MyISAM table information
-
+  if ( not defined($opt{structstat}) or $opt{nostructstat} == 1 );    # Don't print table struct information
+$opt{myisamstat} = 1
+  if ( not defined($opt{myisamstat}) or $opt{nomyisamstat} == 0 );    # Don't print MyISAM table information
 # for RPM distributions
 $opt{cvefile} = "/usr/share/mysqltuner/vulnerabilities.csv"
   unless ( defined $opt{cvefile} and -f "$opt{cvefile}" );
@@ -3857,7 +3856,7 @@ sub mysql_stats {
 
 # Recommendations for MyISAM
 sub mysql_myisam {
-    return 0 unless $opt{'myisamstat'} == 1;
+    return 0 unless ($opt{'myisamstat'} > 0);
     subheaderprint "MyISAM Metrics";
     my $nb_myisam_tables = select_one(
 "SELECT COUNT(*) FROM information_schema.TABLES WHERE ENGINE='MyISAM' and TABLE_SCHEMA NOT IN ('mysql','information_schema','performance_schema')"
@@ -5807,7 +5806,7 @@ sub get_wsrep_option {
 
 # REcommendations for Tables
 sub mysql_table_structures {
-    return 0 unless $opt{structstat} == 1;
+    return 0 unless ($opt{structstat} > 0);
     subheaderprint "Table structures analysis";
 
     my @primaryKeysNbTables = select_array(