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Optimizing Meta Queries in Databases Wataru Matsumoto1, Takao Miura1, Shingo Kashikawa1 and Isamu Shioya2 1 Dept. of Elect. & Elect. Engr., Hosei University Abstract. This paper discusses query optimization of extended relational expressions on meta queries, and propose several rewriting rules to optimize meta queries under some restricted conditions. They are heavily utilizing signatures, meta knowledge, in our experimental database system HOME. Keywords: meta queries, optimization, signatures. |