Most of work on partial information in databases asks which operations of standard languages, like relational algebra, can still be performed correctly in the presence of nulls. In...
Abstract. We consider query execution strategies for object-oriented distributed databases. There are several scenarios of query decomposition, assuming that the corresponding quer...
Hanna Kozankiewicz, Krzysztof Stencel, Kazimierz S...
The interest is in characterizing insightfully the power of program self-reference in effective programming systems (epses), the computability-theoretic analogs of programming lan...
Access limitations may occur when querying data sources over the web or heterogeneous data sources presented as relational tables: this happens, for instance, in Data Exchange and ...
d Abstract) Dario Colazzo1 , Giorgio Ghelli2 , Paolo Manghi2 , and Carlo Sartiani2 1 LRI - Universit?e Paris Sud 2 Dipartimento di Informatica - Universit`a di Pisa If a subexpress...
Dario Colazzo, Giorgio Ghelli, Paolo Manghi, Carlo...