Core schema mappings

Giansalvatore Mecca, Paolo Papotti, Salvatore Raunich

Research output: Chapter in Book/Report/Conference proceedingConference contribution

38 Scopus citations

Abstract

Research has investigated mappings among data sources under two perspectives. On one side, there are studies of practical tools for schema mapping generation; these focus on algorithms to generate mappings based on visual specifications provided by users. On the other side, we have theoretical researches about data exchange. These study how to generate a solution - i.e., a target instance - given a set of mappings usually specified as tuple generating dependencies. However, despite the fact that the notion of a core of a data exchange solution has been formally identified as an optimal solution, there are yet no mapping systems that support core computations. In this paper we introduce several new algorithms that contribute to bridge the gap between the practice of mapping generation and the theory of data exchange. We show how, given a mapping scenario, it is possible to generate an executable script that computes core solutions for the corresponding data exchange problem. The algorithms have been implemented and tested using common runtime engines to show that they guarantee very good performances, orders of magnitudes better than those of known algorithms that compute the core as a post-processing step.

Original languageEnglish (US)
Title of host publicationSIGMOD-PODS'09 - Proceedings of the International Conference on Management of Data and 28th Symposium on Principles of Database Systems
Pages655-668
Number of pages14
DOIs
StatePublished - Dec 4 2009
EventInternational Conference on Management of Data and 28th Symposium on Principles of Database Systems, SIGMOD-PODS'09 - Providence, RI, United States
Duration: Jun 29 2009Jul 2 2009

Publication series

NameSIGMOD-PODS'09 - Proceedings of the International Conference on Management of Data and 28th Symposium on Principles of Database Systems

Conference

ConferenceInternational Conference on Management of Data and 28th Symposium on Principles of Database Systems, SIGMOD-PODS'09
CountryUnited States
CityProvidence, RI
Period6/29/097/2/09

Keywords

  • Core computation
  • Data exchange
  • Schema mappings

ASJC Scopus subject areas

  • Software

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    Mecca, G., Papotti, P., & Raunich, S. (2009). Core schema mappings. In SIGMOD-PODS'09 - Proceedings of the International Conference on Management of Data and 28th Symposium on Principles of Database Systems (pp. 655-668). (SIGMOD-PODS'09 - Proceedings of the International Conference on Management of Data and 28th Symposium on Principles of Database Systems). https://doi.org/10.1145/1559845.1559914