1 files changed, 22 insertions, 1 deletions
diff --git a/django/db/models/sql/datastructures.py b/django/db/models/sql/datastructures.py
index b8e06daf01..612eb8f2d9 100644
--- a/django/db/models/sql/datastructures.py
+++ b/django/db/models/sql/datastructures.py
@@ -40,4 +40,25 @@ class Date(object):
             col = '%s.%s' % tuple([qn(c) for c in self.col])
         else:
             col = self.col
-        return connection.ops.date_trunc_sql(self.lookup_type, col)
+        return connection.ops.date_trunc_sql(self.lookup_type, col), []
+
+class DateTime(object):
+    """
+    Add a datetime selection column.
+    """
+    def __init__(self, col, lookup_type, tzname):
+        self.col = col
+        self.lookup_type = lookup_type
+        self.tzname = tzname
+
+    def relabel_aliases(self, change_map):
+        c = self.col
+        if isinstance(c, (list, tuple)):
+            self.col = (change_map.get(c[0], c[0]), c[1])
+
+    def as_sql(self, qn, connection):
+        if isinstance(self.col, (list, tuple)):
+            col = '%s.%s' % tuple([qn(c) for c in self.col])
+        else:
+            col = self.col
+        return connection.ops.datetime_trunc_sql(self.lookup_type, col, self.tzname)