fix issue #12

Author: michiya

django_pyodbc/operations.py

@@ -129,6 +129,9 @@ def lookup_cast(self, lookup_type):
             return "UPPER(%s)"
         return "%s"
 
+    def max_name_length(self):
+        return 128
+
     def quote_name(self, name):
         """
         Returns a quoted version of the given table, index or column name. Does