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Please use this identifier to cite or link to this item: http://hdl.handle.net/1783.1/285
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.
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URI: http://hdl.handle.net/1783.1/285
Appears in Collections:CSE Journal/Magazine Articles

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