Definition
A polytransaction T+ is a transitive closure of a transaction T submitted to an Interdependent Data Management System (a type of a multidatabase system which enforces dependencies among related data objects). The transitive closure is computed with respect to an Interdatabase Dependency Schema (IDS) consisting of a collection of data dependency descriptors (D3s), which specify the dependencies between data objects.
Key Points
Data objects in multiple (possibly distributed and/or heterogeneous) systems which form dependencies among them are called interdependent data. These dependencies are identified through data dependency descriptors (D3s). A D3 specifies the relationships between source and target objects including how much inconsistency can be tolerated between them before it is necessary to restore it, and the actions to take to maintain consistency when it reaches intolerable levels. All these D3s together form an Interdatabase Dependency Schema (IDS) [3].
When a...
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsRecommended Reading
Karabatis G, Rusinkiewicz M, Sheth A. Correctness and enforcement of multidatabase interdependencies. In: Advanced database systems LNCS, vol 759. London: Springer; 1993. p. 337–58.
Karabatis G, Rusinkiewicz M, Sheth A. Interdependent database systems. In: Elmagarmid A, Rusinkieuicz M, Sheth A, editors. Management of heterogeneous and autonomous database systems. San Francisco: Morgan-Kaufmann; 1999. p. 217–52.
Rusinkiewicz M, Sheth A, Karabatis G. Specifying interdatabase dependencies in a multidatabase environment. IEEE Comput. 1991;24(12):46–53.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Section Editor information
Rights and permissions
Copyright information
© 2018 Springer Science+Business Media, LLC, part of Springer Nature
About this entry
Cite this entry
Karabatis, G. (2018). Polytransactions. In: Liu, L., Özsu, M.T. (eds) Encyclopedia of Database Systems. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-8265-9_732
Download citation
DOI: https://doi.org/10.1007/978-1-4614-8265-9_732
Published:
Publisher Name: Springer, New York, NY
Print ISBN: 978-1-4614-8266-6
Online ISBN: 978-1-4614-8265-9
eBook Packages: Computer ScienceReference Module Computer Science and Engineering