The LLUNATIC data-cleaning framework

Floris Geerts, Giansalvatore Mecca, Paolo Papotti, Donatello Santoro

Research output: Contribution to journalConference articlepeer-review

135 Scopus citations


Data-cleaning (or data-repairing) is considered a crucial problem in many database-related tasks. It consists in making a database consistent with respect to a set of given constraints. In recent years, repairing methods have been proposed for several classes of constraints. However, these methods rely on ad hoc decisions and tend to hard-code the strategy to repair conflicting values. As a consequence, there is currently no general algorithm to solve database repairing problems that involve different kinds of constraints and different strategies to select preferred values. In this paper we develop a uniform framework to solve this problem. We propose a new semantics for repairs, and a chase-based algorithm to compute minimal solutions. We implemented the framework in a DBMSbased prototype, and we report experimental results that confirm its good scalability and superior quality in computing repairs.

Original languageEnglish (US)
Pages (from-to)625-636
Number of pages12
JournalProceedings of the VLDB Endowment
Issue number9
StatePublished - 2013
Externally publishedYes
Event39th International Conference on Very Large Data Bases, VLDB 2012 - Trento, Italy
Duration: Aug 26 2013Aug 30 2013

ASJC Scopus subject areas

  • Computer Science (miscellaneous)
  • General Computer Science


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