sphinx.conf中
sql_query = \
SELECT aid,aid AS testid, title,group_id \
FROM documents
aid为主键ID，
必须AS成testid后，
再添加一个属性，sql_attr_uint = testid
才可以显示成如下形式:
[matches] => Array
(
[1] => Array
(
[weight] => 1
[attrs] => Array
(
[testid] => 1 ------------>显示出来了，这个问题搞了一下午，气人
[group_id] => 1
)
)
)