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| Title: | Path dictionary : a new approach to query processing in object-oriented databases |
| Authors: | Lee, Wang-Chien
Lee, Dik Lun |
| Keywords: | Path dictionary index
PDI
Nested queries
Object oriented databases
Traversal search
Associative search |
| Issue Date: | 1998 |
| Citation: | IEEE transactions on knowledge and data engineering, v. 10, no. 3, May/June 1998, p. 371-388 |
| Abstract: | We present a new access method, called the path dictionary index (PDI) method, for supporting nested queries on object-oriented databases. PDI supports object traversal and associative search, respectively, with a path dictionary and a set of attribute indexes built on top of the path dictionary. We discuss issues on indexing and query processing in object-oriented databases, describe the operations of the new mechanism, develop cost models for its storage overhead and query and update costs, and compare the new mechanism to the path index method. The result shows that the path dictionary index method is significantly better than the path index method over a wide range of parameters in terms of retrieval and update costs and that the storage overhead grows slowly with the number of indexed attributes. |
| Rights: | © 1998 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. |
| URI: | http://hdl.handle.net/1783.1/285 |
| Appears in Collections: | CSE Journal/Magazine Articles
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