Journal of Computer Science and Technology

, Volume 2, Issue 4, pp 276–286 | Cite as

The optimization of distributed join in C-POREL system

  • Jin Hongping 
  • Gu Junzhong 
Regular Papers


C-POREL is a distributed relational data base management system, with full distribution transparency. A relation can be horizontally fragmented into several subrelations allocated to different sites[6]. When two or more fragmented relations appear in a join query, many-to-many semijoins between correspondent relations are usually needed in order to fully reduce relations involved. Distribution dependent attributes of a relational schema are defined in this paper. An optimization approach of distributed join which decreases the amount of transmission data by avoiding many-to-many semijoins is given.


Query Processing Transaction Manager Relational Database System Distribute Database System Logical Architecture 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Science Press, Beijing China and Allerton Press Inc. 1987

Authors and Affiliations

  • Jin Hongping 
    • 1
  • Gu Junzhong 
    • 1
  1. 1.East China Normal UniversityShanghai

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