1 files changed, 23 insertions, 0 deletions
diff --git a/lib/sqlalchemy/engine/default.py b/lib/sqlalchemy/engine/default.py
index dd9a0d278..4a3791c35 100644
--- a/lib/sqlalchemy/engine/default.py
+++ b/lib/sqlalchemy/engine/default.py
@@ -164,6 +164,29 @@ class DefaultExecutionContext(base.ExecutionContext):
         return self._last_updated_params                
     def lastrow_has_defaults(self):
         return self._lastrow_has_defaults
+    def set_input_sizes(self, cursor, parameters):
+        """given a cursor and ClauseParameters, call the appropriate style of 
+        setinputsizes() on the cursor, using DBAPI types from the bind parameter's
+        TypeEngine objects."""
+        if isinstance(parameters, list):
+            plist = parameters
+        else:
+            plist = [parameters]
+        if self.dialect.positional:
+            inputsizes = []
+            for params in plist[0]:
+                for key in params.positional:
+                    typeengine = params.binds[key].type
+                    inputsizes.append(typeengine.get_dbapi_type(self.dialect.module))
+            cursor.setinputsizes(*inputsizes)
+        else:
+            inputsizes = {}
+            for params in plist[0]:
+                for key in params.keys():
+                    typeengine = params.binds[key].type
+                    inputsizes[key] = typeengine.get_dbapi_type(self.dialect.module)
+            cursor.setinputsizes(**inputsizes)
+        
     def _process_defaults(self, engine, proxy, compiled, parameters):
         """INSERT and UPDATE statements, when compiled, may have additional columns added to their
         VALUES and SET lists corresponding to column defaults/onupdates that are present on the