Question

在起草ORMlite（Android）请求时，真的需要您的帮助。

有sql查询（NamedQuery）：

select m.contact.stringId, count(m.contact.stringId) from MessageEntityImpl m where m.status = MessageStatus.NEW group by m.contact.stringId"
SELECT m.chat_id, c.stringid, c.fullname, m.message, Max(posted) as postDate from messageentity m inner join (select chat_id, MAX(posted) max_posted from messageentity group by chat_id) max_posted_date ON m.chat_id = max_posted_date.chat_id and posted = max_posted_date.max_posted inner join contactentity c on c.ID = m.contact_id group by m.chat_id, c.stringid, c.fullname, m.message order by postDate desc

Answer 1

最好发出一个原始查询以获得结果（如GenericRawResults<T>），然后遍历容器以获得所需的结果。这是一个例子 -

String sql = "select m.contact.stringId from MessageEntityImpl m where m.status = MessageStatus.NEW group by m.contact.stringId";

ArrayList<String> id = new ArrayList<>();

try
{
    GenericRawResults<String[]> grr = getDao().queryRaw(sql);
    List<String[]> results = grr.getResults();
    for (String[] outArray : results)
        id.add (outArray[0]);
}
catch (SQLException sqle)
{
    sqle.printStackTrace();
}

getDao（）可以是BaseDaoImpl<T,ID>。

ORMLite（Android）请帮我起草请求

1 个答案: