Instance Optimal Join Size Estimation
Instance Optimal Join Size Estimation
复制标题
实例最佳连接大小估计
DOI:
10.1016/j.procs.2021.11.019
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发表时间:
2021
期刊:
影响因子:
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通讯作者:
Samadian, Alireza
中科院分区:
文献类型:
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作者:
Abo-Khamis, Mahmoud;Im, Sungjin;Moseley, Benjamin;Pruhs, Kirk;Samadian, Alireza
We consider the problem of efficiently estimating the size of the join of a collection of preprocessed relational tables from the perspective of instance optimality analysis. The running time of instance optimal algorithms is comparable to the minimum time needed to verify the correctness of a solution. Previously, instance optimal algorithms were only known when the size of the join was small (as one component of their running time was linear in the join size). We give an instance optimal algorithm for estimating the join size for all instances, including when the join size is large, by removing the dependency on the join size. As a byproduct, we show how to sample rows from the join uniformly at random in a comparable amount of time.
DOI:
10.1145/1377676.1377693
发表时间:
2008
期刊:
Comput. Geom.
影响因子:
--
作者:
Timothy M. Chan
通讯作者:
Timothy M. Chan
DOI:
--
发表时间:
2019
期刊:
影响因子:
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作者:
Kaleb Alway
通讯作者:
Kaleb Alway
影响因子:
22.7
作者:
Roughgarden, Tim
通讯作者:
Roughgarden, Tim