Everyone wants to say that their Ruby-on-Rails projects are using the best data structures on the latest RDBSs, sheer brilliance through and through. The simple fact of life, however, is that not every project is from-scratch, not every project can have a new whistle-clean schema designed for it, and not every datasource is a brand-spanking new install of PostgreSQL. For the times when you're not working with the newest, you may feel a need for a new connector to your older database: