1 files changed, 23 insertions, 0 deletions
diff --git a/django/db/models/sql/datastructures.py b/django/db/models/sql/datastructures.py
index 5b01abbb87..46411599c8 100644
--- a/django/db/models/sql/datastructures.py
+++ b/django/db/models/sql/datastructures.py
@@ -57,3 +57,26 @@ class Count(Aggregate):
         else:
             return 'COUNT(%s)' % col
 
+class Date(object):
+    """
+    Add a date selection column.
+    """
+    def __init__(self, col, lookup_type, date_sql_func):
+        self.col = col
+        self.lookup_type = lookup_type
+        self.date_sql_func= date_sql_func
+
+    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, quote_func=None):
+        if not quote_func:
+            quote_func = lambda x: x
+        if isinstance(self.col, (list, tuple)):
+            col = '%s.%s' % tuple([quote_func(c) for c in self.col])
+        else:
+            col = self.col
+        return self.date_sql_func(self.lookup_type, col)
+