429 search results - page 14 / 86 » A SAT approach to query optimization in mediator systems |
VLDB
2007
ACM
14 years 8 months ago
2007
ACM
Incompleteness due to missing attribute values (aka "null values") is very common in autonomous web databases, on which user accesses are usually supported through media...
VLDB
1987
ACM
14 years 2 days ago
1987
ACM
A Datalog program can be translated into a system of fixpoint equations of relational algebra; this paper studies how such a system can be solved and optimized for a particular qu...
DEXA
1995
Springer
14 years 4 days ago
1995
Springer
Abstract. The object-oriented database management systems store references to objects (implicit joins, precomputed joins), and use path expressions in query languages. One way of e...
VLDB
2007
ACM
14 years 2 months ago
2007
ACM
Testing a database engine has been and continues to be a challenging task. The space of possible SQL queries along with their possible access paths is practically unbounded. Moreo...
DBISP2P
2003
Springer
14 years 1 months ago
2003
Springer
Databases have employed a schema-based approach to store and retrieve structured data for decades. For peer-to-peer (P2P) networks, similar approaches are just beginning to emerge,...