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use Tie::DBI;

...
                     user       => $def_dbuser,
                     password   => $def_dbpw,
                     CLOBBER    => 3};

   #
   #  Find all the new, deleted and changed entries
...
      $repmax = max ($repmax, $db{$_}->{reputation});
      $repmin = min ($repmin, $db{$_}->{reputation});
   }