if ( grep $_ == $xpid, @procs ) {
   print "Pid is in use : $xpid\n";
}

##</code><code>##

$procs = $dbh->selectall_arrayref("select spid from v\$process");
if ( grep $_ == $xpid, @$procs ) {
   print "Pid is in use : $xpid\n";
}

##</code><code>##

$procs = $dbh->selectall_arrayref("select spid from v\$process");
my $found;
foreach (@$procs) {
  if ($_ == $xpid) {
    $found = 1;
    last;
  }
}
if ($found) {
   print "Pid is in use : $xpid\n";
}

##</code><code>##

$procs = $dbh->selectall_arrayref('select spid from v$process');