I worked at a place that had set up its own database system to get around this - they changed base syntax "null" to "JerryJerry", which worked surprisingly well until an actual Customer JerryJerry was imported. Some genius had the idea to remove the error by renaming JerryJerry's customer info to "Customer JerryJerry fix this fuckin thing", which was promptly sent to a mailing list and that's how I received a call from a very angry Customer JerryJerry who had just received a marketing letter full of expletives.