So which of them work well with Oracle, SQL Server, and DB2 drivers? Your average fortune 500 company isn't moving to PostgreSQL for the hell of it. They're ru

So which of them work well with Oracle, SQL Server, and DB2 drivers? Your average fortune 500 company isn't moving to PostgreSQL for the hell of it. They're running on top of unix, but it all comes down to the database. And the java and .NET drivers are the best options. Rails has oracle and DB2 options, but how many people are using them? How well are they supported? How many people are around if you run into problems? What list of consultants can you hire when an advanced problem comes up? Otherwise, you're stuck with a labyrinth of ETL jobs between the main DB and your internal app. That's not going to bode well, especially with JRuby around. The other option is writing your business logic in the JVM and doing rest calls between that and your front end. I've heard multiple discussions of this (and even seen it done a few times.) But that's not getting rid of the JVM.