Abstract :
Constraint Databases (CDBs) are the combination of Constraint Logic Programming (CLP, which is one of the strategic directions in computing research) and database technology. CDBs represent a new kind of post-relational databases, naturally extending relational, deductive, or object-oriented databases by making feasible the use of constraints to represent possibly infinite but representable complex data. This paper discusses constraint query languages and their expressive powers, constraint query, evaluation and optimization techniques, CDBs prototype systems and promising directions of research on CDBs
Keywords :
constraint handling; query languages; CDBs; Constraint Databases; Constraint Logic Programming; constraint query languages; database technology; expressive powers; post-relational databases; Books; Computer science; Database languages; Deductive databases; Logic programming; Object oriented databases; Prototypes; Query processing; Relational databases; Spatial databases;
