Top trees are a dynamic self-adjusting data structure that can be used by any tree algorithm. Actually, an arbitrary number of different tree algorithms can use a single structure....
The problems of query containment, equivalence, and minimization are recognized as very important in the context of query processing, specifically of query optimization. In their...
The integration of query languages and programming languages is still a central problem of database research. In particular, issues with respect to the impedance mismatch are of i...