62 search results - page 2 / 13 » Query rewriting with symmetric constraints |
LICS
2007
IEEE
13 years 11 months ago
2007
IEEE
We introduce symmetric Datalog, a syntactic restriction of linear Datalog and show that its expressive power is exactly that of restricted symmetric monotone Krom SNP. The deep re...
JAPLL
2010
13 years 3 months ago
2010
Answering queries over an incomplete database w.r.t. a set of constraints is an important computational task with applications in fields as diverse as information integration and ...
IJCAI
2003
13 years 6 months ago
2003
In this paper we address the problem of query answering and rewriting in global-as-view data integration systems, when key and inclusion dependencies are expressed on the global i...
SIGMOD
2004
ACM
14 years 5 months ago
2004
ACM
We study the problem of answering queries through a target schema, given a set of mappings between one or more source schemas and this target schema, and given that the data is at...
DBPL
2007
Springer
13 years 8 months ago
2007
Springer
