System R: relational approach to database management
ACM Transactions on Database Systems (TODS)
New Programming Languages for Artificial Intelligence Research
ACM Computing Surveys (CSUR)
The notions of consistency and predicate locks in a database system
Communications of the ACM
A relational model of data for large shared data banks
Communications of the ACM
POPL '75 Proceedings of the 2nd ACM SIGACT-SIGPLAN symposium on Principles of programming languages
ACM Transactions on Information Systems (TOIS)
Interval hierarchies and their application to predicate files
ACM Transactions on Database Systems (TODS)
Graphics Programming Using a Database System with Dependency Declarations
ACM Transactions on Graphics (TOG)
The complexity of testing predicate locks
SIGMOD '79 Proceedings of the 1979 ACM SIGMOD international conference on Management of data
Query triggers for XML DBMS: Efficient implementation based on shadow mechanism
Programming and Computing Software
A transformational framework for the automatic control of derived data
VLDB '81 Proceedings of the seventh international conference on Very Large Data Bases - Volume 7
Processing conjunctive predicates and queries
VLDB '80 Proceedings of the sixth international conference on Very Large Data Bases - Volume 6
Data architecture and data model considerations
AFIPS '77 Proceedings of the June 13-16, 1977, national computer conference
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This paper considers the specifications and design of a trigger subsystem in a database management system. The use of triggers as extended assertions and as a means to materialize virtual data objects are discussed. The functional requirements of a trigger subsystem and different implementation issues are studied. We also examine the relationships between a trigger subsystem and the rest of the database system, in particular the authorization and locking subsystems.