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Unformatted text preview: o Type of index. 3. This information is, in itself, a miniature database. We can use the database to store data about itself, simplifying the overall structure of the system, and allowing the full power of the database to be used to permit fast access to system data. 4. The exact choice of how to represent system data using relations must be made by the system designer. One possible representation follows. 5. aaaaaaaaaaaa System-catalog-schema = (relation-name, number-attrs) 6. 7. Attr-schema = (attr-name, rel-name, domain-type, position, length) 8. 9. User-schema = (user-name, encrypted-password, group) 10. 11. Index-schema = (index-name, rel-name, index-type, index-attr) 12. 13. View-schema = (view-name, definition) 14....
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- Spring '07