#!/usr/local/bin/perl -w
use strict;
use DBI;
use DBD::Sybase;
use File::Find;

my $dbh = ....;  # connect to database
my $sth = $dbh->prepare("select filename from bench where filename=?");

# look for new files
my @new_files;
find( { follow => 1, no_chdir => 1,
        wanted =>
          sub {
            if (! /\.$/) {            # ignore unwanted . or ..
              $sth->execute($_);
              my $file_exists;
              while (my @res = $sth->fetchrow_array()) { $file_exists++ }
              push @new_files if !$file_exits;
            }
          }
      }, '/');
$sth->finish;

# insert new files into the database
$sth = $dbh->prepare("insert into bench (filename) values (?)");
$sth->execute($_) for @new_files;
$sth->finish;

# do stuff with @new_files ....