Translating Aggregate Queries into Iterative Programs.

@inproceedings{DBLP:conf/vldb/Freytag86,
  author    = {Johann Christoph Freytag and
               Nathan Goodman},
  editor    = {Wesley W. Chu and
               Georges Gardarin and
               Setsuo Ohsuga and
               Yahiko Kambayashi},
  title     = {Translating Aggregate Queries into Iterative Programs},
  booktitle = {VLDB'86 Twelfth International Conference on Very Large Data Bases,
               August 25-28, 1986, Kyoto, Japan, Proceedings},
  publisher = {Morgan Kaufmann},
  year      = {1986},
  isbn      = {0-934613-18-4},
  pages     = {138-146},
  ee        = {db/conf/vldb/Freytag86.html},
  crossref  = {DBLP:conf/vldb/86},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

Abstract

Over the last decade, many techniques for optimizing relational queries have been developed. However, the optimization of queries with aggregation has received little attention.

This paper investigates possible improvements for aggregate queries on groups of tuples. We suggest the use of program transformation methods to systematically generate efficient iterative programs for their evaluation. Two transformation steps successively translate a program, which sorts the relation before applying the aggregate function, into an iterative program which performs the aggregation while sorting, thus using less time and space than needed for the execution of the initial program.

Copyright © 1986 by the VLDB Endowment. Permission to copy without fee all or part of this material is granted provided that the copies are not made or distributed for direct commercial advantage, the VLDB copyright notice and the title of the publication and its date appear, and notice is given that copying is by the permission of the Very Large Data Base Endowment. To copy otherwise, or to republish, requires a fee and/or special permission from the Endowment.

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