To Not Miss the Forest for the Trees - A Holistic Approach for Explaining Missing Answers over Nested Data
To Not Miss the Forest for the Trees - A Holistic Approach for Explaining Missing Answers over Nested Data
复制标题
只见树木,不见森林——解释嵌套数据缺失答案的整体方法
DOI:
10.1145/3448016.3457249
复制
发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Glavic, Boris
中科院分区:
文献类型:
--
作者:
Diestelkämper, Ralf;Lee, Seokki;Herschel, Melanie;Glavic, Boris
Query-based explanations for missing answers identify which operators of a query are responsible for the failure to return a missing answer of interest. This type of explanations has proven useful, e.g., to debug complex analytical queries. Such queries are frequent in big data systems such as Apache Spark. We present a novel approach to produce query-based explanations. It is the first to support nested data and to consider operators that modify the schema and structure of the data (e.g., nesting, projections) as potential causes of missing answers. To efficiently compute explanations, we propose a heuristic algorithm that applies two novel techniques: (i) reasoning about multiple schema alternatives for a query and (ii) re-validating at each step whether an intermediate result can contribute to the missing answer. Using an implementation on Spark, we demonstrate that our approach is the first to scale to large datasets while often finding explanations that existing techniques fail to identify.
登录
查看更多内容
DOI:
--
发表时间:
2019
期刊:
International Conference on Extending Database Technology
影响因子:
--
作者:
Daniel Deutch;Amir Gilad
通讯作者:
Amir Gilad
DOI:
10.1109/bigdata.2017.8258260
发表时间:
2017-12
期刊:
2017 IEEE International Conference on Big Data (Big Data)
影响因子:
--
作者:
Pouria Pirzadeh;M. Carey;T. Westmann
通讯作者:
Pouria Pirzadeh;M. Carey;T. Westmann
DOI:
--
发表时间:
2017
期刊:
Online Proceedings
影响因子:
--
作者:
Spoth, W.;Arab, B. S.;Chan, E. S.;Gawlick, D.;Ghoneimy, A.;Glavic, B.;Hammerschmidt, B.;Kennedy, O.;Lee, S.;Liu, Z. H.
通讯作者:
Liu, Z. H.
DOI:
--
发表时间:
2020
期刊:
International Conference on Extending Database Technology
影响因子:
--
作者:
Daniel Deutch;Nave Frost;Amir Gilad;Tomer Haimovich
通讯作者:
Tomer Haimovich
DOI:
--
发表时间:
2019
期刊:
TaPP
影响因子:
--
作者:
Diestelkämper, Ralf;Glavic, Boris;Herschel, Melanie;Lee, Seokki
通讯作者:
Lee, Seokki