Hi list - I am pleased to announce that due to the diligent efforts of Ants Aasma, SQLAlchemy 0.4 will feature native two-phased commit support, explicit SAVEPOINT support, and nested transaction support for both MySQL and Postgres, with probable support for Oracle as well. This is represented as an extension to sqlalchemy.engine.Transaction, for which a subclass now features a prepare() method, in conjunction with a new begin_twophase() method on Connection, as well as a begin_nested() method in order to issue nested transactions. It also features new clause structures which represent SAVEPOINT instructions explicitly. These structures interact with the individual Dialect to produce the appropriate structures for Postgres and MySQL, which issues XA transactions on the latter (Oracle also supports XA transactions as well so its integration should be straightforward).
This transaction capability can be integrated with ORM level transactions explicitly at the moment, however we will be adding "automatic" support for two-phase semantics to take place within multi- database sessions, based on a configurational flag to create_session(), which is also getting a few more tricks in 0.4. In recent months the SQLAlchemy community has really come together posting more tickets, patches, bug reports than ever before, and we have the most committers ever. The 0.4 branch now features 760 unit tests. I am thrilled to see SQLAlchemy's "organic" approach to development, characterized by broad-based, foundationally-focused development (and intentionally slow-moving version numbers), really begin to pay off as we start growing into higher level functionalities. - mike --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To post to this group, send email to sqlalchemy@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en -~----------~----~----~----~------~----~------~--~---
