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  1. or download this
    print "\nTesting no placeholders, no results $dsn\n";
my $sth = $dbh->prepare("select 'test' where 1=0");
...
print "\nTesting placeholders with no results $dsn\n";
my $sthThird = $dbh->prepare("select ? where 1=0");
print Dumper $dbh->selectall_arrayref($sthThird);
  2. or download this
    Testing no placeholders, no results dbi:Sybase:server=xxx.xxx.xxx.xxx
$VAR1 = [];
...

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