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Graphflow: An Active Graph Database

Published: 09 May 2017 Publication History

Abstract

Many applications detect the emergence or deletion of certain subgraphs in their input graphs continuously. In order to evaluate such continuous subgraph queries, these applications resort to inefficient or highly specialized solutions because existing graph databases are passive systems that only support one-time subgraph queries. We demonstrate Graphflow, a prototype active graph data-base that evaluates general one-time and continuous subgraph queries. Graphflow supports the property graph data model and the Cypher++ query language, which extends Neo4j's declarative Cypher language with subgraph-condition-action triggers. At the core of Graphflow's query processor are two worst-case optimal join algorithms called Generic Join and our new Delta Generic Join algorithm for one-time and continuous subgraph queries, respectively.

References

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A. Gupta, I. S. Mumick, and V. S. Subrahmanian. Maintaining Views Incrementally. SIGMOD Rec., 22(2), 1993.
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P. Gupta, V. Satuluri, A. Grewal, S. Gurumurthy, V. Zhabiuk, Q. Li, and J. Lin. Real-time Twitter Recommendation: Online Motif Detection in Large Dynamic Graphs. VLDB, 7(13), 2014.
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Neo4j. https://neo4j.com/.
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H. Q. Ngo, C. Ré, and A. Rudra. Skew strikes back: New developments in the theory of join algorithms. SIGMOD Rec., 42(4), 2014.
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OrientDB. http://orientdb.com/orientdb/.
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cover image ACM Conferences
SIGMOD '17: Proceedings of the 2017 ACM International Conference on Management of Data
May 2017
1810 pages
ISBN:9781450341974
DOI:10.1145/3035918
Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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Association for Computing Machinery

New York, NY, United States

Publication History

Published: 09 May 2017

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Author Tags

  1. active queries
  2. graph databases
  3. incremental view maintenance
  4. worst-case optimal joins

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SIGMOD/PODS'17
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