| Author | Chen, Ren-shan |
| Call Number | AIT Thesis no.CS-89-06 |
| Subject(s) | Question-answering systems
|
| Note | A thesis submitted in partial fulfillment of the requirement for
the degree of Master of Science |
| Publisher | Asian Institute of Technology |
| Abstract | A new extension to "relation", called restricted relation,
is introduced. It is a global view of the fragments of a relation
in distributed databases. By the representation of restricted
relations, a query can be transformed step by step into an
optimized form and subqueries are generated which are sent to
their corresponding sites. The answer to the query is a collection or a consolidation of subanswers.
Query transformation s in a distributed deductive data base is
also investigated through four practical cases. It is found that
"external functions" to distributed databases do not add to the
discuss ion of query transformation. In other words, the
discussion of query transformation in distributed databases can
be isolated from " external functions". A set of algorithms for
query optimization in distributed (deductive) databases has been
developed. |
| Year | 1989 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Information and Communications Technologies (DICT) |
| Academic Program/FoS | Computer Science (CS) |
| Chairperson(s) | Phan, Minh Dung; |
| Examination Committee(s) | Kanchit Malaivongs;Kanchana Kanchanasut; |
| Scholarship Donor(s) | China Technical Consultants Inc., R.O.C. |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1989 |