Consolidation of query results in a multidatabase environment: an object-oriented approach

Abstract

This research extends an existing framework for translating global queries over a heterogeneous network of databases, focusing on the consolidation of query results and the resolution of semantic differences between component databases and the global schema. The research uses an object-oriented database for the global platform and a self-describing global schema as a means for providing access to database information. During query consolidation, query results are read into object classes along with the metadata needed to resolve the semantic differences. Through encapsulated procedures, query results are transformed and merged into the global format. This research identifies the information needed in the global schema for resolution of semantic heterogeneity during consolidation of query results.