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A case for dynamic view management
Yannis Kotidis, Nick Roussopoulos
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
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
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...