PODS
1999
ACM
13 years 9 months ago
1999
ACM
In this paper we consider the problem of the logical characterization of the notion of consistent answer in a relational database that may violate given integrity constraints. Thi...
PODS
1999
ACM
13 years 9 months ago
1999
ACM
We identify one of the incompatibility problems associated with atomic commit :protocols that prevents them from being used together and weiderive a correctness criterion that cap...
PODS
1999
ACM
13 years 9 months ago
1999
ACM
We investigate the problem of how to extend constraint query languages with aggregate operators. We deal with standard relational aggregation, and also with aggregates speci c to ...