In : Proceedings of the International EDBT Conference
نویسندگان
چکیده
We present an execution model for distributed transactions that can be employed for multidatabase systems. We use the Flex Transaction model that has been proposed as a highly general and exible tool for the speciication of distributed transactions and extend it by allowing nested and possibly recursive transaction speci-cations. We show how a given transaction speciication and its execution model can be mapped into a representation in a new concurrent Prolog language, the VPL (Vienna Parallel Logic) language. The representation in VPL can be considered as an executable speciication. We show some optimizations concerning this mapping and deene a signiicant subclass of Flex Transactions with a declarative representation in VPL that can be modeled by AND/OR structures. We argue that it is more advantageous to use VPL directly for the transaction speciication because it provides more exibility and more control aspects than the Flex Transaction model.
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