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sub do {
    my($dbh, $statement, $attr, @params) = @_;
...
    my $rows = $sth->rows;
    ($rows == 0) ? "0E0" : $rows;
}

If any arguments are given, then C<execute> will effectively call
L</bind_param> for each value before executing the statement.  Values
...
the driver can determine the correct type (which is rare), or unless
C<bind_param> (or C<bind_param_inout>) has already been used to
specify the type.