Fixed #7596. Added Model.objects.bulk_create, and make use of it in several places. This provides a performance benefit when inserting multiple objects. THanks to Russ for the review, and Simon Meers for the MySQl implementation.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@16739 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/db/backends/mysql/base.py

@@ -124,6 +124,7 @@ class DatabaseFeatures(BaseDatabaseFeatures):
     allows_group_by_pk = True
     related_fields_match_type = True
     allow_sliced_subqueries = False
+    has_bulk_insert = True
     has_select_for_update = True
     has_select_for_update_nowait = False
     supports_forward_references = False
@@ -263,6 +264,10 @@ class DatabaseOperations(BaseDatabaseOperations):
     def max_name_length(self):
         return 64
 
+    def bulk_insert_sql(self, fields, num_values):
+        items_sql = "(%s)" % ", ".join(["%s"] * len(fields))
+        return "VALUES " + ", ".join([items_sql] * num_values)
+
 class DatabaseWrapper(BaseDatabaseWrapper):
     vendor = 'mysql'
     operators = {