Fixed #12429 -- Modified RawQuery to provide some facilities required…

… by Oracle. Thanks to Karen Tracey for the testing help.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@12907 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/db/models/sql/query.py

@@ -37,9 +37,24 @@ def __init__(self, sql, using, params=None):
         self.using = using
         self.cursor = None
 
+        # Mirror some properties of a normal query so that
+        # the compiler can be used to process results.
+        self.low_mark, self.high_mark = 0, None  # Used for offset/limit
+        self.extra_select = {}
+        self.aggregate_select = {}
+
     def clone(self, using):
         return RawQuery(self.sql, using, params=self.params)
 
+    def convert_values(self, value, field, connection):
+        """Convert the database-returned value into a type that is consistent
+        across database backends.
+
+        By default, this defers to the underlying backend operations, but
+        it can be overridden by Query classes for specific backends.
+        """
+        return connection.ops.convert_values(value, field)
+
     def get_columns(self):
         if self.cursor is None:
             self._execute_query()