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ACM Transactions on Database Systems (TODS), Volume 26 Issue 4, December 2001

Editorial
Richard Snodgrass
Pages: 385-387
DOI: 10.1145/503099.505055

A case for dynamic view management
Yannis Kotidis, Nick Roussopoulos
Pages: 388-423
DOI: 10.1145/503099.503100
Materialized aggregate views represent a set of redundant entities in a data warehouse that are frequently used to accelerate On-Line Analytical Processing (OLAP). Due to the complex structure of the data warehouse and the different profiles of the...

Multiway spatial joins
Nikos Mamoulis, Dimitris Papadias
Pages: 424-475
DOI: 10.1145/503099.503101
Due to the evolution of Geographical Information Systems, large collections of spatial data having various thematic contents are currently available. As a result, the interest of users is not limited to simple spatial selections and joins, but...

SchemaSQL: An extension to SQL for multidatabase interoperability
Laks V. S. Lakshmanan, Fereidoon Sadri, Subbu N. Subramanian
Pages: 476-519
DOI: 10.1145/503099.503102
We provide a principled extension of SQL, called SchemaSQL, that offers the capability of uniform manipulation of data and schema in relational multidatabase systems. We develop a precise syntax and semantics of SchemaSQL in a manner...