Encyclopedia of Database Systems

2018 Edition
| Editors: Ling Liu, M. Tamer Özsu

Complex Event

  • Opher Etzion
Reference work entry
DOI: https://doi.org/10.1007/978-1-4614-8265-9_584

Synonyms

Composite event; Derived event

Definition

A complex event is an event derived from a collection of events by either aggregation or derivation function [3].

Key Points

A complex event [ 1, 2] is a derived event; it can be derived by various means:
  1. 1.
    Explicit concatenation of a collection of events,
    • Example: Create an event that contains all the events that are related to the 2008 USA presidential elections.

     
  2. 2.
    Derivation of an aggregated value from a collection of events from the same type.
    • Example: Create an event that contains the average, maximal and minimal value of a certain stock during a single trade day.

     
  3. 3.
    Derivation [ 4] of an event as a function of other events that is a result of event pattern detection.
    • Example: Whenever a sequence of three complain-events from the same customer occurs within a single week, create an event “angry customer” with the customer-id.

     

Note that this event may or may not contain the raw complain events.

Cross-References

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Recommended Reading

  1. 1.
    Ericsson AM, Pettersson P, Berndtsson M, Seiriö M. Seamless formal verification of complex event processing applications. In: Proceedings of the Inaugural International Conference on Distributed Event-Based Systems; 2007. p. 50–61.Google Scholar
  2. 2.
    Luckham D. The power of events. Boston: Addison-Wesley; 2002.Google Scholar
  3. 3.
    Luckham D, Schulte R, editors. EPTS event processing glossary version 1.1. http://complexevents.com/?p=409
  4. 4.
    Zimmer D, Unland R. On the semantics of complex events in active database management systems. In: Proceedings of the 15th International Conference on Data Engineering; 1999. p. 392–99.Google Scholar

Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.IBM Software GroupIBM Haifa Labs, Haifa University CampusHaifaIsrael

Section editors and affiliations

  • Opher Etzion
    • 1
  1. 1.IBM Software GroupIBM Haifa Labs, Haifa University CampusHaifaIsrael