I've been very slowly continuing my work on two-phase commits for a couple months now, and I now have my original patch updated so that it applies to the current CVS tip, with some improvements.
The patch introduces three new commands, PREPCOMMIT, COMMITPREPARED and ABORTPREPARED. To start a 2PC transaction, you first do a BEGIN and your updates as usual. At the end of the transaction, you call PREPCOMMIT 'foobar' instead of COMMIT. Now the transaction is in prepared state, ready to commit at a later time. 'foobar' is the global transaction identifier assigned for the transaction. Later, when you want to finish the second phase, you call COMMITPREPARED 'foobar'; There is a system view pg_prepared_xacts that gives you all transactions that are in prepared state waiting for COMMITPREPARED or ABORTPREPARED. I have also done some work on XA-enabling the JDBC drivers, now that we have what it takes in the server side. I have succesfully executed 2PC transactions with JBossMQ and Postgres, using JBoss as the transaction manager, so the basic stuff seems to be working. Please have a look and comment, the patches can be found here: http://www.iki.fi/hlinnaka/pgsql/ What is the schedule for 7.5? Any chance of getting this in? - Heikki ---------------------------(end of broadcast)--------------------------- TIP 3: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to [EMAIL PROTECTED] so that your message can get through to the mailing list cleanly
