SANTOS: Relationship-based Semantic Table Union Search
SANTOS: Relationship-based Semantic Table Union Search
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SANTOS:基于关系的语义表联合搜索
DOI:
10.1145/3588689
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发表时间:
2023
期刊:
影响因子:
--
通讯作者:
Riedewald, Mirek
中科院分区:
文献类型:
--
作者:
Khatiwada, Aamod;Fan, Grace;Shraga, Roee;Chen, Zixuan;Gatterbauer, Wolfgang;Miller, Renée J.;Riedewald, Mirek
Existing techniques for unionable table search define unionability using metadata (tables must have the same or similar schemas) or column-based metrics (for example, the values in a table should be drawn from the same domain). In this work, we introduce the use of semantic relationships between pairs of columns in a table to improve the accuracy of the union search. Consequently, we introduce a new notion of unionability that considers relationships between columns, together with the semantics of columns, in a principled way. To do so, we present two new methods to discover the semantic relationships between pairs of columns. The first uses an existing knowledge base (KB), and the second (which we call a "synthesized KB") uses knowledge from the data lake itself. We adopt an existing Table Union Search benchmark and present new (open) benchmarks that represent small and large real data lakes. We show that our new unionability search algorithm, called SANTOS, outperforms a state-of-the-art union search that uses a wide variety of column-based semantics, including word embeddings and regular expressions. We show empirically that our synthesized KB improves the accuracy of union search by representing relationship semantics that may not be contained in an available KB. This result hints at a promising future of creating synthesized KBs from data lakes with limited KB coverage and using them for union search.
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DOI:
--
发表时间:
2021
期刊:
影响因子:
--
作者:
Riccardo Cappuzzo;Paolo Papotti;Saravanan Thirumuruganathan
通讯作者:
Saravanan Thirumuruganathan
DOI:
--
发表时间:
2021
期刊:
SIGMOD Conference
影响因子:
--
作者:
Vinh Thinh Ho;K. Pal;G. Weikum
通讯作者:
G. Weikum
DOI:
10.1145/3318464.3389726
发表时间:
2020-06
期刊:
Proceedings. ACM-SIGMOD International Conference on Management of Data
影响因子:
--
作者:
Zhang Y;Ives ZG
通讯作者:
Ives ZG
影响因子:
2.5
作者:
Renée J. Miller
通讯作者:
Renée J. Miller
DOI:
--
发表时间:
2016
期刊:
影响因子:
--
作者:
Brent Glays
通讯作者:
Brent Glays