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• W2130600711 abstract "The optimization of general queries in a distributed database management system is an important research topic. The problem is to select the best sequence of database operations that will process the query and minimize costs. Our algorithm, which is based on reduction filters, can process general queries consisting of an arbitrary number of relations and join attributes. Each query is represented by a graph and an adjacency list. Each relation is usually only processed once-to minimize data transfers. However, if a filter changes during use then certain relations must be processed again-a queue is used to record this information. This work has one serious limitation-we used a perfect hash function which means that collisions are not possible. Experiments showed that our algorithm could reduce data transfers very substantially. However, in a database collisions in the reduction filter are a reality and a problem. Such collisions mean that the hash-semijoin cannot achieve the same amount of reduction as a traditional semijoin would. We investigate the effect that collisions have on the performance of our algorithm." @default.
• W2130600711 created "2016-06-24" @default.
• W2130600711 creator A5024916850 @default.
• W2130600711 creator A5037586515 @default.
• W2130600711 date "2003-01-20" @default.
• W2130600711 modified "2023-09-26" @default.
• W2130600711 title "The effect of collisions on the performance of reduction filters" @default.
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• W2130600711 doi "https://doi.org/10.1109/ccece.1999.807198" @default.
• W2130600711 hasPublicationYear "2003" @default.
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