A relational framework for join implementation in model management systems
Two important issues in the design of relational model banks are the degree to which they should be aggregated or disaggregated and the methods by which disaggregated model banks might be integrated in response to user queries. Three topics relevant to this issue are addressed in this paper. The fir...
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| Veröffentlicht in: | Decision Support Systems 1985, Vol.1 (1), p.69-81 |
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| creator | Blanning, Robert W |
| description | Two important issues in the design of relational model banks are the degree to which they should be aggregated or disaggregated and the methods by which disaggregated model banks might be integrated in response to user queries. Three topics relevant to this issue are addressed in this paper. The first is whether a universal model and its projections may possess the lossy join property. We will show that they do not. The second is the development of a relational algebra for the specification of join implementation in model banks, and the third is the realization of such an algebra in a language similar to Query-by-Example. |
| doi_str_mv | 10.1016/0167-9236(85)90198-8 |
| format | Article |
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| ispartof | Decision Support Systems, 1985, Vol.1 (1), p.69-81 |
| issn | 0167-9236 1873-5797 |
| language | eng |
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| subjects | Algorithms Decision support systems Fixed Point Functional Dependency Information Management Information processing Lossy Join Mathematical models Model Bank Model Management Relational Algorithms Relational Join Relational Language Relational Projection Table Skeleton Theory Virtual Relation |
| title | A relational framework for join implementation in model management systems |
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