phyllis@utcsrgv.UUCP (Phyllis Eve Bregman) (06/06/84)
[****]
UofT Department of Computer Science Seminar Schedule for
the week of June 4th, 1984
Friday, June 8th, 2:00 P.M., GB119, Dr. Eric Simon, SABRE Project,
INRIA, Le Chesnay-Cedex, France: "Design and implementation of an
extendible integrity subsystem".
ABSTRACT: This talk presents a powerful integrity subsystem, which is
implemented in the SABRE database system. The specification language
is simple. The enforcement algorithm is general; in particular, it
handles referential dependency and temporal assertions. Specialized
strategies efficiently treat each class of assertions. The system
automatically manages integrity checkpoints. Also, an efficient method
is described for processing assertions involving aggregates. An
analysis exhibits the value of the algorithms. It is shown that, in
general, this method is better than the query modification method for
domain assertions. Measures have also been done for giving the cost
added for controlling integrity in comparison with the cost of the
request itself.
--
Phyllis Eve Bregman
CSRG, Univ. of Toronto
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CSNET: phyllis@toronto
(416) 978 6985