Major refactoring of the MSSQL dialect. Thanks zzzeek.

Includes simplifying the IDENTITY handling and the exception handling. Also
includes a cleanup of the connection string handling for pyodbc to favor
the DSN syntax.

1 files changed, 5 insertions, 2 deletions

diff --git a/lib/sqlalchemy/engine/default.py b/lib/sqlalchemy/engine/default.py
index 11fd43df5..682ab526c 100644
--- a/lib/sqlalchemy/engine/default.py
+++ b/lib/sqlalchemy/engine/default.py
@@ -259,6 +259,9 @@ class DefaultExecutionContext(base.ExecutionContext):
     def post_exec(self):
         pass
     
+    def handle_dbapi_exception(self, e):
+        pass
+
     def get_result_proxy(self):
         return base.ResultProxy(self)
 
@@ -306,7 +309,7 @@ class DefaultExecutionContext(base.ExecutionContext):
             try:
                 self.cursor.setinputsizes(*inputsizes)
             except Exception, e:
-                self._connection._handle_dbapi_exception(e, None, None, None)
+                self._connection._handle_dbapi_exception(e, None, None, None, self)
                 raise
         else:
             inputsizes = {}
@@ -318,7 +321,7 @@ class DefaultExecutionContext(base.ExecutionContext):
             try:
                 self.cursor.setinputsizes(**inputsizes)
             except Exception, e:
-                self._connection._handle_dbapi_exception(e, None, None, None)
+                self._connection._handle_dbapi_exception(e, None, None, None, self)
                 raise
 
     def __process_defaults(self):