自定义关键词连接 join
以 full join 为例
.join("FULL JOIN", UserAddressDO.class, on -> on
.eq(UserAddressDO::getUserId, UserDO::getId)
.eq(UserAddressDO::getId, UserDO::getId))
对应sql
FULL JOIN user_address t1 ON (t1.user_id = t.id AND t1.id = t.id)