print "\nTesting no placeholders, no results $dsn\n";
my $sth = $dbh->prepare("select 'test' where 1=0");
print Dumper $dbh->selectall_arrayref($sth);

print "\nTesting placeholders with results $dsn\n";
my $sthSecond = $dbh->prepare("select ? where 1=1");
print Dumper $dbh->selectall_arrayref($sthSecond);

print "\nTesting placeholders with no results $dsn\n";
my $sthThird = $dbh->prepare("select ? where 1=0");
print Dumper $dbh->selectall_arrayref($sthThird);