// 版本信息
const THINK_VERSION = '3.2.3beta';

$query0 =
$model->alias('m')
->join('left join __DOCUMENT__ d on m.uid=d.uid')
->where('id>2')
->field('m.uid,m.nickname,d.name docname,d.title as doctitle')
->buildSql();
$query =
$model->alias('m')
->join('left join __DOCUMENT__ d on m.uid=d.uid')
->where('id>2')
->field('m.uid,m.nickname,d.name docname,d.title as doctitle')
->select(false);

var_dump($query0,$query);

string '( SELECT m.uid,m.nickname,d.name docname,d.title as doctitle FROM ot_member m left join ot_document d on m.uid=d.uid WHERE ( id>2 ) )' (length=135)

string '( SELECT m.uid,m.nickname,d.name docname,d.title as doctitle FROM ot_member m m left join ot_document d on m.uid=d.uid WHERE ( id>2 ) )' (length=137)

select(false) 多了个表别名