/* free_result() */
static VALUE stmt_free_result(VALUE obj)
{
struct mysql_stmt* s = DATA_PTR(obj);
check_stmt_closed(obj);
if (s->res) {
mysql_free_result(s->res);
s->res = NULL;
}
if (mysql_stmt_free_result(s->stmt))
mysql_stmt_raise(s->stmt);
return obj;
}