Adaptable query optimization and evaluation in temporal middleware

Giedrius Slivinskas, Christian S. Jensen, Richard Thomas Snodgrass

Research output: Contribution to journalConference articlepeer-review

5 Scopus citations


Time-referenced data are pervasive in most real-world databases. Recent advances in temporal query languages show that such database applications may benefit substantially from built-in temporal support in the DBMS. To achieve this, temporal query optimization and evaluation mechanisms must be provided, either within the DBMS proper or as a source level translation from temporal queries to conventional SQL. This paper proposes a new approach: using a middleware component on top of a conventional DBMS. This component accepts temporal SQL statements and produces a corresponding query plan consisting of algebraic as well as regular SQL parts. The algebraic parts are processed by the middleware, while the SQL parts are processed by the DBMS. The middleware uses performance feedback from the DBMS to adapt its partitioning of subsequent queries into middleware and DBMS parts. The paper describes the architecture and implementation of the temporal middleware component, termed TANGO, which is based on the Volcan o extensible query optimizer and the XXL query processing library. Experiments with the system demonstrate the utility of the middleware's internal processing capability and its cost-based mechanism for apportioning the processing between the middleware and the underlying DBMS.

Original languageEnglish (US)
Pages (from-to)127-138
Number of pages12
JournalProceedings of the ACM SIGMOD International Conference on Management of Data
StatePublished - 2001
Event2001 ACM SIGMOD International Conference on Management of Data - Santa Barbara, CA, United States
Duration: May 21 2001May 24 2001

ASJC Scopus subject areas

  • Software
  • Information Systems


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