62 search results - page 2 / 13 » Query rewriting with symmetric constraints |
LICS
2007
IEEE
14 years 5 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 9 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
14 years 7 days 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 11 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
14 years 2 months ago
2007
Springer
