Object Databases were once a thing, and PostgreSQL PostgreSQL used the term Object Relational to indicate it could be used as both an Object Database (it suppor

Object Databases were once a thing, and PostgreSQL PostgreSQL used the term Object Relational to indicate it could be used as both an Object Database (it supports table inheritance) and/or a Relational Database. Not that you should ever use the feature, being a historical artifact full of historical gotchas and your clever design becomes a maintenance burden.