sub _execute {
        my $self = shift;
        my($sql, $place, $finish) = @_;

        my($sth, $rv);
        eval {
            $sth = $self->prepare($sql);
            $rv = $sth->execute(ref $place eq "ARRAY" ? @$place : ());
            $sth->finish if $finish;
        };
        if ($@) {
            My::Exception::DB->throw(sql => $sql, error => $@);
        }
        return $finish ? $rv : $sth;
    }