A logical view of structured files

A logical view of structured files Structured data stored in files can benefit from standard database technology. In particular, we show here how such data can be queried and updated using declarative database languages. We introduce the notion of structuring schema, which consists of a grammar annotated with database programs. Based on a structuring schema, a file can be viewed as a database structure, queried and updated as such. For queries, we show that almost standard database optimization techniques can be used to answer queries without having to construct the entire database. For updates, we study in depth the propagation to the file of an update specified on the database view of this file. The problem is not feasible in general and we present a number of negative results. The positive results consist of techniques that allow to propagate updates efficiently under some reasonable locality conditions on the structuring schemas. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png The VLDB Journal Springer Journals

A logical view of structured files

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Publisher
Springer-Verlag
Copyright
Copyright © 1998 by Springer-Verlag Berlin Heidelberg
Subject
Computer Science; Database Management
ISSN
1066-8888
eISSN
0949-877X
D.O.I.
10.1007/s007780050056
Publisher site
See Article on Publisher Site

Abstract

Structured data stored in files can benefit from standard database technology. In particular, we show here how such data can be queried and updated using declarative database languages. We introduce the notion of structuring schema, which consists of a grammar annotated with database programs. Based on a structuring schema, a file can be viewed as a database structure, queried and updated as such. For queries, we show that almost standard database optimization techniques can be used to answer queries without having to construct the entire database. For updates, we study in depth the propagation to the file of an update specified on the database view of this file. The problem is not feasible in general and we present a number of negative results. The positive results consist of techniques that allow to propagate updates efficiently under some reasonable locality conditions on the structuring schemas.

Journal

The VLDB JournalSpringer Journals

Published: May 1, 1998

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