fix date processing for SQLServer 2005

bug : datetime is a subclass of date, so isinstance was returning true for
datetime instances (and we were losing the time part for all datetime
attributes)

1 files changed, 1 insertions, 1 deletions

diff --git a/db.py b/db.py
index 877cb0e..d3d2acd 100644
--- a/db.py
+++ b/db.py
@@ -670,7 +670,7 @@ class _PyodbcAdapter(DBAPIAdapter):
                     args = []
                     for key in key_order:
                         arg = kwargs[key]
-                        if isinstance(arg, _date_class):
+                        if arg.__class__ == _date_class:
                             arg = datetime.datetime.combine(arg, datetime.time(0))
                         args.append(arg)