Didn't mean to trod on anyone's toes. I think interbase (from which firebird forked) was the first successful/important database system to use MVCC. I just ment

Didn't mean to trod on anyone's toes. I think interbase (from which firebird forked) was the first successful/important database system to use MVCC. I just mentioned MGA because that was how I first and commonly have heard MVCC described. I guess David Reed was the first to come up with the idea even if he never implemented it. But I doubt that Postgres ignored what Interbase had demonstrated as being feasible and successful in practice.