ACM SIGMOD Anthology TODS dblp.uni-trier.de

The Temporal Query Language TQuel.

Richard T. Snodgrass: The Temporal Query Language TQuel. ACM Trans. Database Syst. 12(2): 247-298(1987)
@article{DBLP:journals/tods/Snodgrass87,
  author    = {Richard T. Snodgrass},
  title     = {The Temporal Query Language TQuel},
  journal   = {ACM Trans. Database Syst.},
  volume    = {12},
  number    = {2},
  year      = {1987},
  pages     = {247-298},
  ee        = {http://doi.acm.org/10.1145/22952.22956, db/journals/tods/Snodgrass87.html},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}
BibTeX

Abstract

Recently, attention has been focused on temporal databases, representing an enterprise over time. We have developed a new language, TQuel, to query a temporal database. TQuel was designed to be a minimal extension, both syntactically and semantically, of Quel, the query language in the Ingres relational database management system. This paper discusses the language informally, then provides a tuple relational calculus semantics for the TQuel statements that differ from their Quel counterparts, including the modification statements. The three additional temporal constructs defined in TQuel are shown to be direct semantic analogues of Quel's where clause and target list. We also discuss reducibility of the semantics to Quel's semantics when applied to a static database. TQuel is compared with ten other query languages supporting time.

Copyright © 1987 by the ACM, Inc., used by permission. Permission to make digital or hard copies is granted provided that copies are not made or distributed for profit or direct commercial advantage, and that copies show this notice on the first page or initial screen of a display along with the full citation.


Joint ACM SIGMOD / IEEE Computer Society Anthology

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Referenced by

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  120. Arie Segev, Arie Shoshani: The Representation of a Temporal Data Model in the Relational Environment. SSDBM 1988: 39-61
  121. Mostafa A. Bassiouni, Mark J. Llewellyn: Handling Time in Query Languages. SSDBM 1988: 105-119
  122. Shashi K. Gadia, Chuen-Sing Yeung: A Generalized Model for a Relational Temporal Database. SIGMOD Conference 1988: 251-259
  123. Jan Chomicki, Tomasz Imielinski: Temporal Deductive Databases and Infinite Objects. PODS 1988: 61-73
  124. Nikos A. Lorentzos, Roger G. Johnson: An Extension of the Relational Model to Support Generic Intervals. EDBT 1988: 528-542
  125. L. Edwin McKenzie, Richard T. Snodgrass: Extending the Relational Algebra to Support Transaction Time. SIGMOD Conference 1987: 467-478
  126. Ilsoo Ahn, Richard T. Snodgrass: Performance Evaluation of a Temporal Database Management System. SIGMOD Conference 1986: 96-107
  127. Shashi K. Gadia: Toward a Multihomogeneous Model for a Temporal Database. ICDE 1986: 390-397
  128. Richard T. Snodgrass, Ilsoo Ahn: A Taxonomy of Time in Databases. SIGMOD Conference 1985: 236-246
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DBLP: Copyright © by Michael Ley (ley@uni-trier.de), last change: Tue Jun 24 18:39:01 2008