Provenance semirings

  • Authors:
  • Todd J. Green;Grigoris Karvounarakis;Val Tannen

  • Affiliations:
  • University of Pennsylvania;University of Pennsylvania;University of Pennsylvania

  • Venue:
  • Proceedings of the twenty-sixth ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
  • Year:
  • 2007

Quantified Score

Hi-index 0.00

Visualization

Abstract

We show that relational algebra calculations for incomplete databases, probabilistic databases, bag semantics and why-provenance are particular cases of the same general algorithms involving semirings. This further suggests a comprehensive provenance representation that uses semirings of polynomials. We extend these considerations to datalog and semirings of formal power series. We give algorithms for datalog provenance calculation as well as datalog evaluation for incomplete and probabilistic databases. Finally, we show that for some semirings containment of conjunctive queries is the same as for standard set semantics.