Added an implementation of bulk insert via the ORM to the Oracle DB backend.

Refs #7596, r16739 and http://troels.arvin.dk/db/rdbms/#insert-multiple

git-svn-id: http://code.djangoproject.com/svn/django/trunk@16819 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/db/backends/oracle/base.py

@@ -78,6 +78,7 @@ class DatabaseFeatures(BaseDatabaseFeatures):
     supports_bitwise_or = False
     can_defer_constraint_checks = True
     ignores_nulls_in_unique_constraints = False
+    has_bulk_insert = True
 
 class DatabaseOperations(BaseDatabaseOperations):
     compiler_module = "django.db.backends.oracle.compiler"
@@ -372,6 +373,10 @@ WHEN (new.%(col_name)s IS NULL)
         name_length = self.max_name_length() - 3
         return '%s_TR' % util.truncate_name(table, name_length).upper()
 
+    def bulk_insert_sql(self, fields, num_values):
+        items_sql = "SELECT %s FROM DUAL" % ", ".join(["%s"] * len(fields))
+        return " UNION ALL ".join([items_sql] * num_values)
+
 
 class _UninitializedOperatorsDescriptor(object):