[Developers] MQL link history for primitives_live

[John Giannandrea]

> On Jul 4, 2009, at 1:49 PM, Iain Sproat wrote:
>> I'm trying to get the history of user primitive count. I've got the  
>> below query which gets my current primitive count, if the value of  
>> timestamp is null.
>> My guess with specifying a timestamp value doesn't seem to work.

The problem is that the links with the older timestamp were replaced  
with the latest one.
So you need to specify valid:false to see the older ones:

{
   "type":          "/freebase/user_activity",
   "user":          "/user/sprocketonline",
   "primitives_live": null,
   "old:primitives_live": {
     "value": null,
     "link": {
       "valid":      false,
       "timestamp>": "2009-06-04",
       "timestamp":  null
     },
     "limit": 1
   }
}

-jg