my $dbh = $base::dbh; # get a database handle

eval {
  # lots of inserts, updates, etc...
};
if ($@) {
  my $err = $@;
  eval { $dbh->rollback };
  # display formatted errors
  $base::showerrors(
    ($base::debug ? $err : "database related error"),
    ($@ ? " error performing rollback\n"
        : " rollback performed successfully\n")
  );
}

##</code><code>##

sub dbtry (&@) {
  my ($dbtry, $dbcatch) = @_;

  local $dbh = $base::dbh;
  eval { local $_ = $dbh; &$dbtry };
  if($@) {
    local $_ = "dbcaught:";
    chomp $@;
    $_ .= ($base::debug)
      ? " $@"
      : " database related error";
    eval { $dbh->rollback };
    $_ .= ($@ ? " Error Performing Rollback\n"
              : " Rollback Performed Successfully\n");
    &$dbcatch;
  }
}

sub dbcatch (&) { $_[0] }

##</code><code>##

dbtry {
  # lots of inserts, updates, etc...
} dbcatch {
  $base::showerrors("error: $_");
}