Robustness Against Read Committed for Transaction Templates with Functional Constraints

Brecht Vandevoort, Bas Ketsman, Christoph Koch, Frank Neven

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

5 Citations (Scopus)


The popular isolation level Multiversion Read Committed (RC) trades some of the strong guarantees of serializability for increased transaction throughput. Sometimes, transaction workloads can be safely executed under RC obtaining serializability at the lower cost of RC. Such workloads are said to be robust against RC. Previous work has yielded a tractable procedure for deciding robustness against RC for workloads generated by transaction programs modeled as transaction templates. An important insight of that work is that, by more accurately modeling transaction programs, we are able to recognize larger sets of workloads as robust. In this work, we increase the modeling power of transaction templates by extending them with functional constraints, which are useful for capturing data dependencies like foreign keys. We show that the incorporation of functional constraints can identify more workloads as robust that otherwise would not be. Even though we establish that the robustness problem becomes undecidable in its most general form, we show that various restrictions on functional constraints lead to decidable and even tractable fragments that can be used to model and test for robustness against RC for realistic scenarios.

Original languageEnglish
Title of host publication25th International Conference on Database Theory, ICDT 2022
EditorsDan Olteanu, Nils Vortmeier
PublisherSchloss Dagstuhl- Leibniz-Zentrum fur Informatik GmbH, Dagstuhl Publishing
ISBN (Electronic)9783959772235
Publication statusPublished - 1 Mar 2022
Event25th International Conference on Database Theory - Edinburgh, United Kingdom
Duration: 29 Mar 20221 Apr 2022

Publication series

NameLeibniz International Proceedings in Informatics, LIPIcs
ISSN (Print)1868-8969


Conference25th International Conference on Database Theory
Abbreviated titleICDT 2022
Country/TerritoryUnited Kingdom


  • complexity
  • concurrency control
  • robustness


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