A Query Engine for Probabilistic Preferences
A Query Engine for Probabilistic Preferences
复制标题
概率偏好的查询引擎
DOI:
10.1145/3183713.3196923
复制
发表时间:
2018
期刊:
影响因子:
--
通讯作者:
Stoyanovich, Julia
中科院分区:
文献类型:
--
作者:
Cohen, Uzi;Kenig, Batya;Ping, Haoyue;Kimelfeld, Benny;Stoyanovich, Julia
Models of uncertain preferences, such as Mallows, have been extensively studied due to their plethora of application domains. In a recent work, a conceptual and theoretical framework has been proposed for supporting uncertain preferences as first-class citizens in a relational database. The resulting database is probabilistic, and, consequently, query evaluation entails inference of marginal probabilities of query answers. In this paper, we embark on the challenge of a practical realization of this framework. We first describe an implementation of a query engine that supports querying probabilistic preferences alongside relational data. Our system accommodates preference distributions in the general form of the Repeated Insertion Model (RIM), which generalizes Mallows and other models. We then devise a novel inference algorithm for conjunctive queries over RIM, and show that it significantly outperforms the state of the art in terms of both asymptotic and empirical execution cost. We also develop performance optimizations that are based on sharing computation among different inference tasks in the workload. Finally, we conduct an extensive experimental evaluation and demonstrate that clear performance benefits can be realized by a query engine with built-in probabilistic inference, as compared to a stand alone implementation with a black-box inference solver.
登录
查看更多内容
影响因子:
7.5
作者:
Lilyana Mihalkova;L. Getoor
通讯作者:
Lilyana Mihalkova;L. Getoor
影响因子:
2.7
作者:
MALLOWS, CL
通讯作者:
MALLOWS, CL
影响因子:
0.9
作者:
Ekhine Irurozki;Borja Calvo;J. A. Lozano
通讯作者:
Ekhine Irurozki;Borja Calvo;J. A. Lozano
影响因子:
12
作者:
Toshihiro Kamishima;S. Akaho
通讯作者:
S. Akaho
影响因子:
2.1
作者:
Gail Mcelroy;Michael Marsh
通讯作者:
Michael Marsh