Rails2.3 - Implement new savepoint support. Nice and easy!

Author: metaskills

CHANGELOG

@@ -1,6 +1,10 @@
 
 MASTER
 
+* Rails2.3 - Implement new savepoint support [Ken Collins]
+  http://rails.lighthouseapp.com/projects/8994/tickets/383
+  http://www.codeproject.com/KB/database/sqlservertransactions.aspx
+
 * Rails2.3 - Coerce NestedScopingTest#test_merged_scoped_find to use correct regexp for adapter. [Ken Collins]
 
 * Rails2.3 - Implement a custom ActiveRecord::Associations::ClassMethods::JoinDependency::JoinAssociation#aliased_table_name_for

lib/active_record/connection_adapters/sqlserver_adapter.rb

@@ -189,6 +189,10 @@ def supports_ddl_transactions?
         true
       end
 
+      def supports_savepoints?
+        true
+      end
+      
       def database_version
         @database_version ||= info_schema_query { select_value('SELECT @@version') }
       end
@@ -358,6 +362,17 @@ def rollback_db_transaction
         do_execute "ROLLBACK TRANSACTION" rescue nil
       end
 
+      def create_savepoint
+        do_execute "SAVE TRANSACTION #{current_savepoint_name}"
+      end
+
+      def release_savepoint
+      end
+      
+      def rollback_to_savepoint
+        do_execute "ROLLBACK TRANSACTION #{current_savepoint_name}"
+      end
+      
       def add_limit_offset!(sql, options)
         # Validate and/or convert integers for :limit and :offets options.
         if options[:offset]