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);

##</code><code>##

Testing no placeholders, no results dbi:Sybase:server=xxx.xxx.xxx.xxx
$VAR1 = [];

Testing placeholders with results dbi:Sybase:server=xxx.xxx.xxx.xxx
$VAR1 = [
          [
            undef
          ]
        ];

Testing placeholders with no results dbi:Sybase:server=xxx.xxx.xxx.xxx
$VAR1 = [];

Testing no placeholders, no results dbi:Sybase:server=xxx.xxx.xxx.xxx;tdsLevel=CS_TDS_495
$VAR1 = [];

Testing placeholders with results dbi:Sybase:server=xxx.xxx.xxx.xxx;tdsLevel=CS_TDS_495
$VAR1 = [
          [
            undef
          ]
        ];

Testing placeholders with no results dbi:Sybase:server=xxx.xxx.xxx.xxx;tdsLevel=CS_TDS_495
(hang)