@inproceedings{8cfa80a8aeab459f98efe542dca050dc,
title = "Early separation of filter and refinement steps in spatial query optimization",
abstract = "The spatial query has been processed in two steps, the filter step and the refinement step, due to the large volume and high complexity of the spatial data. However, this approach has been considered only in the query execution phase after completion of the query optimization phase. This paper presents query optimization strategies which take the characteristics of spatial databases into account. The first strategy is the separation of filter and refinement steps not in the query execution phase but in the query optimization phase. As the second strategy, several refinement operations can be combined in processing a complex query, and as the third strategy several filter operations can also be combined. We call the optimization technique utilizing these strategies the early separated filter and refinement (ESFAR). This paper also presents a rule-based optimization technique for ESFAR.",
author = "Park, {Ho Hyun} and Lee, {Chan Gun} and Lee, {Yong Ju} and Chung, {Chin Wan}",
note = "Publisher Copyright: {\textcopyright} 1999 IEEE.; 6th International Conference on Database Systems for Advanced Applications, DASFAA 1999 ; Conference date: 19-04-1999 Through 21-04-1999",
year = "1999",
doi = "10.1109/DASFAA.1999.765748",
language = "English",
series = "Proceedings - 6th International Conference on Database Systems for Advanced Applications, DASFAA 1999",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "161--168",
booktitle = "Proceedings - 6th International Conference on Database Systems for Advanced Applications, DASFAA 1999",
address = "United States",
}