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Heterogeneous databases: inferring relationships for merging component schemas, and a query language (1992).
| Content Provider | CiteSeerX |
|---|---|
| Author | Whang, W. K. Chakravarthy, S. Navathe, S. B. |
| Abstract | The need for accessing independently developed database management systems using a unified conceptual view has been well-recognized. View or schema integration is an important component of this problem of designing heterogeneous or federated database management systems. In this paper, we address the problems of: i) identification of relationships among relations grouped into a cluster, ii) checking the consistency of specified relationships, and iii) exhaustively deriving new relationships from the ones specified -- useful for merging relations from component databases into a global view relation. Specifically, five types of relationships (equal, contains, contained-in, overlap and disjoint) are considered. Merging of component schemas in a federated database environment can benefit substantially from the knowledge of the relationship between relations in a cluster. We present an algorithm to check the consistency of asserted relationships and to derive all possible relations... |
| File Format | |
| Publisher Date | 1992-01-01 |
| Access Restriction | Open |
| Subject Keyword | Heterogeneous Database Query Language Merging Component Schema Inferring Relationship Unified Conceptual View Schema Integration Possible Relation Component Database Important Component Federated Database Environment Global View Relation Federated Database Management System New Relationship Specified Relationship Database Management System Asserted Relationship Component Schema |
| Content Type | Text |
