抒情短诗
发表于 2025-3-28 17:18:12
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Nomadic
发表于 2025-3-28 20:02:26
Alfred Kleinknechtmarizing the intermediate result sizes has the ASI property. It further motivates us to restrict the subsequent investigations to this cost function called .. for which we show that the problem remains NP-complete in the general case..Then, we concentrate on the main topic of the paper: the complexi
慢跑鞋
发表于 2025-3-28 23:44:27
Alfred Kleinknechtion process is organized as a sequence of steps, in which at each step all . work in parallel to evaluate the cost of execution plans for partial queries of increasing size, and send their cost estimates to the other . that need them for the next step. The computation is totally distributed, and org
飞来飞去真休
发表于 2025-3-29 05:03:55
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仪式
发表于 2025-3-29 08:03:54
explore some connections between the proposed Kolmogorov expressive power of boolean queries in these languages and their standard expressive power. We show that, except of being of interest for its own, our notion may have important diagnostic value for database query optimisation.