Table groups look rather like hierarchical databases [1], which were the norm before relational databases came along. Do bear in mind that you'll never get Mon

Table groups look rather like hierarchical databases [1], which were the norm before relational databases came along. Do bear in mind that you'll never get MongoDB-style in-place updates in PostgreSQL, due to MVCC. You may save a round-trip with the entire JSON object once they implement update operators, though. [1] http://en.wikipedia.org/wiki/Hierarchical_database_model http://en.wikipedia.org/wiki/Hierarchical_database_model