Terrible hack for PG-9 support.

Remove as soon as /r/all is precomputed.

r2/r2/lib/db/thing.py

@@ -894,6 +894,7 @@ class Query(object):
         self._limit = kw.get('limit')
         self._data = kw.get('data')
         self._sort = kw.get('sort', ())
+        self._filter_primary_sort_only = kw.get('filter_primary_sort_only', False)
 
         self._filter(*rules)
     
@@ -934,8 +935,16 @@ class Query(object):
 
     def _dir(self, thing, reverse):
         ors = []
+
+        # this fun hack lets us simplify the query on /r/all 
+        # for postgres-9 compatibility. please remove it when
+        # /r/all is precomputed.
+        sorts = range(len(self._sort))
+        if self._filter_primary_sort_only:
+            sorts = [0]
+
         #for each sort add and a comparison operator
-        for i in range(len(self._sort)):
+        for i in sorts:
             s = self._sort[i]
 
             if isinstance(s, operators.asc):

r2/r2/models/subreddit.py

@@ -774,7 +774,8 @@ class AllSR(FakeSubreddit):
                         read_cache = True,
                         write_cache = True,
                         cache_time = 60,
-                        data = True)
+                        data = True,
+                        filter_primary_sort_only=True)
         if time != 'all':
             q._filter(queries.db_times[time])
         return q