{"title":"对关系和面向对象的联邦数据库的协作访问","authors":"J. Lerm, J. de Oliveira","doi":"10.1109/FTDCS.1993.344153","DOIUrl":null,"url":null,"abstract":"Much work has been done in the field of heterogeneous federated database systems (FDBSs), but almost all this work deals with relational systems or, eventually, with the integration of hierarchical and network models and the relational model. The authors present a prototype that allows access to relational (INGRES) and object-oriented (O2) database systems composing a federation. They assume that all databases store equivalent information. Users are allowed to specify queries over one of the component databases and the prototype retrieves equivalent information from the other database using a set of mapping rules. These rules define equivalences between the schemas' structures of INGRES and O2. The prototype has been implemented in Prolog and C in a network of Sun workstations.<<ETX>>","PeriodicalId":251095,"journal":{"name":"1993 4th Workshop on Future Trends of Distributed Computing Systems","volume":"42 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1993-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Cooperative access to relational and object-oriented federated databases\",\"authors\":\"J. Lerm, J. de Oliveira\",\"doi\":\"10.1109/FTDCS.1993.344153\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Much work has been done in the field of heterogeneous federated database systems (FDBSs), but almost all this work deals with relational systems or, eventually, with the integration of hierarchical and network models and the relational model. The authors present a prototype that allows access to relational (INGRES) and object-oriented (O2) database systems composing a federation. They assume that all databases store equivalent information. Users are allowed to specify queries over one of the component databases and the prototype retrieves equivalent information from the other database using a set of mapping rules. These rules define equivalences between the schemas' structures of INGRES and O2. The prototype has been implemented in Prolog and C in a network of Sun workstations.<<ETX>>\",\"PeriodicalId\":251095,\"journal\":{\"name\":\"1993 4th Workshop on Future Trends of Distributed Computing Systems\",\"volume\":\"42 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1993-09-22\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"1993 4th Workshop on Future Trends of Distributed Computing Systems\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/FTDCS.1993.344153\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"1993 4th Workshop on Future Trends of Distributed Computing Systems","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/FTDCS.1993.344153","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Cooperative access to relational and object-oriented federated databases
Much work has been done in the field of heterogeneous federated database systems (FDBSs), but almost all this work deals with relational systems or, eventually, with the integration of hierarchical and network models and the relational model. The authors present a prototype that allows access to relational (INGRES) and object-oriented (O2) database systems composing a federation. They assume that all databases store equivalent information. Users are allowed to specify queries over one of the component databases and the prototype retrieves equivalent information from the other database using a set of mapping rules. These rules define equivalences between the schemas' structures of INGRES and O2. The prototype has been implemented in Prolog and C in a network of Sun workstations.<>
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