Please use this identifier to cite or link to this item: http://hdl.handle.net/1783.1/285

Path dictionary: A new access method for query processing in object-oriented databases

Authors Lee, WC
Lee, DL
Issue Date 1998
Source IEEE transactions on knowledge and data engineering , v. 10, (3), 1998, MAY-JUN, p. 371-388
Summary 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.
Subjects
ISSN 1041-4347
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Language English
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