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PODS
1990
ACM
148views Database» more  PODS 1990»
14 years 3 months ago
Stable Models and Non-Determinism in Logic Programs with Negation
Previous researchers have proposed generalizations of Horn clause logic to support negation and nondeterminism as two separate extensions. In this paper, we show that the stable m...
Domenico Saccà, Carlo Zaniolo
PODS
1990
ACM
80views Database» more  PODS 1990»
14 years 3 months ago
Constraint Query Languages
Paris C. Kanellakis, Gabriel M. Kuper, Peter Z. Re...
PODS
1990
ACM
150views Database» more  PODS 1990»
14 years 3 months ago
On Being Optimistic about Real-Time Constraints
- Performancestudiesof concurrencycontrol algorithms for conventional database systems have shown that, under most operating circumstances, locking protocols outperform optimistic ...
Jayant R. Haritsa, Michael J. Carey, Miron Livny