We wrote our own database 15 years ago - needed something embeddable into the application on both windows and linux, i386 and alpha, and the ability to do trans

We wrote our own database 15 years ago - needed something embeddable into the application on both windows and linux, i386 and alpha, and the ability to do transactional schema modifications without global locking. If I recall correctly, postgresql was at 7.3 at the time and would happily dump core if you tried something like 'drop table x;rollback'. And we didn't need full sql semantics, because we partially implemented it into our scripting language anyway and used only cursor APIs. postgresql's mvcc was still a great inspiration for how to design the actual row storage. Served us well, but 15 years later, a bit too much of custom features make it hard to switch to a standard database.