DOI: 10.1007/978-3-662-04031-7_16
关键词: Efficient algorithm 、 Constraint (information theory) 、 Theoretical computer science 、 Computer science 、 Auxiliary memory 、 Range query (data structures) 、 Join (sigma algebra)
摘要: In this chapter, we study the I/O aspects of constraint databases. The goal chapter is to show that for many problems arising in databases, it possible design theoretically and practically efficient algorithms. addition, certain are provably hard with result no algorithms them. This has three parts: Algorithms retrieval constraints from secondary storage (disk) Algorithms join between two sets constraints Lower bounds above