The Orion Uncertain Data Management System

Orion is a state-of-the-art uncertain database man- agement system that extends the relational model to include probabilistic uncertain data as first call data types. This demonstration presents an implementa- tion of this system as an extension of PostgreSQL. The Orion model is capable of supporting both at- tribute and tuple uncertainty with arbitrary correla- tions. Both discrete and continuous pdfs are handled in a natural and accurate manner. The system uses standard SQL with only minimal modifications. The undelying model is consistent with Possible Worlds Se- mantics. We demonstrate the working of Orion and how it simplifies the design and enhances the capabili- ties of two sample applications: managing sensor data (continuous uncertainty) and inferring missing values (discrete uncertainty).