Ode as an Active Database: Constraints and Triggers
Narain H. Gehani, H. V. Jagadish · 1991
this paper, after a quick introduction to O++ in Section 2, we state our design goals in providing trigger and constraint facilities for an object-oriented database in Section 3. We then describe the constraint and trigger facilities in Ode and illustrate their use in Sections 4 through 6. We also discuss issues related to constraints and triggers such as intra-object versus inter-object constraints and triggers, and referential integrity. In Section 7 we give details about the implementation of Ode triggers and constraints. Finally, in Section 8, we discuss constraint and trigger facilities in other systems.