ISSUES IN THE DESIGN OF A GEOGRAPHICAL DATA PROCESSING SYSTEM: A CASE STUDY.

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Making Database Optimizers More Extensible

I am deeply indebted to my advisor, Don Batory, for many years of encouragement and ad-vice, for providing constant direction and focus to my research, and for reading countless drafts of my dissertation. I am a much better researcher because of his excellent guidance. I am also thankful to my committee members, Professors Don Fussell, Dan Miranker, and Avi Silberschatz, and, especially, to Dr. José Blakeley for their meticulous reading o