The Case for Enhanced Abstract Data Types

摘要

The explosion in complex multi-media content makes it crucial for database systems to support such data efficiently. We make the case that the next generation of object-relational database systems should be based on Enhanced Abstract Data Type (E-ADT) technology, rather than on the "blackbox" ADTs used in current systems. An E-ADT is an abstract data type that exposes the semantics of its methods. Query optimizations are performed using these semantics, resulting in efficient query processing. The added functionality does not compromise the modularity of data types and the extensibility of the type system. Fundamental architectural changes are required to build such a database system; these have been explored through the implementation of E-ADTs in Predator. Initial performance results demonstrate an order of magnitude in performance improvements.