如何使用 CS 购物车查询格式获取最后插入的 ID

how to get the last inserted id using cs cart query format?

$datass = array (
    'object_id' => $id,
    'object_type'=>$ty,
    'type' => $t,
    'company_id'=>$c
);
return(db_query("INSERT INTO ?:discussion ?e", $datass));

现在我需要获取最后插入的 id ？我怎么做。

查找上次插入的值的查询必须是

select * from tablename order by desc id limit 0,1

db_query('select * from tablename order by desc id limit 0,1');

db_get_field('SELECT MAX(field_name) FROM ?:table_name');