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Evaluation of Recursive Queries with Extended Rules in Deductive Databases
April 1995 (vol. 7 no. 2)
pp. 328-331
ASCII Text
x 
 
Sang Ho Lee, Lawrence J. Henschen, "Evaluation of Recursive Queries with Extended Rules in Deductive Databases," IEEE Transactions on Knowledge and Data Engineering, vol. 7, no. 2, pp. 328-331, April, 1995.
 
 
BibTex
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@article{ 10.1109/69.382302,
author = {Sang Ho Lee and Lawrence J. Henschen},
title = {Evaluation of Recursive Queries with Extended Rules in Deductive Databases},
journal ={IEEE Transactions on Knowledge and Data Engineering},
volume = {7},
number = {2},
issn = {1041-4347},
year = {1995},
pages = {328-331},
doi = {http://doi.ieeecomputersociety.org/10.1109/69.382302},
publisher = {IEEE Computer Society},
address = {Los Alamitos, CA, USA},
}
 
 
RefWorks Procite/RefMan/Endnote
x 
 
TY - JOUR
JO - IEEE Transactions on Knowledge and Data Engineering
TI - Evaluation of Recursive Queries with Extended Rules in Deductive Databases
IS - 2
SN - 1041-4347
SP328
EP331
EPD - 328-331
A1 - Sang Ho Lee,
A1 - Lawrence J. Henschen,
PY - 1995
KW - Deductive databases
KW - DBMS
KW - recursive queries
KW - query processing
KW - extended rules
KW - automated reasoning.
VL - 7
JA - IEEE Transactions on Knowledge and Data Engineering
ER -
 

Abstract—In order to extend the expressive power of deductive databases, a formula that can have existential quantifiers in prenex normal form in a restricted way is defined as an extended rule. With the extended rule, we can easily define a virtual view that requires a division operation of relational algebra to evaluate. This paper addresses a recursive query evaluation where at least one formula in a recursive rule set is of an extended rule. We investigate transformable recursions as well as four cases of non-transformable recursions of transitive-closure-like and linear type. This work reveals that occurrence of an existentially quantified variable in the extended recursive body predicate might dramatically limit the level of recursive search. In particular, the number of iterations to answer extended queries can be determined, independently of database contents.

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Index Terms:
Deductive databases, DBMS, recursive queries, query processing, extended rules, automated reasoning.
Citation:
Sang Ho Lee, Lawrence J. Henschen, "Evaluation of Recursive Queries with Extended Rules in Deductive Databases," IEEE Transactions on Knowledge and Data Engineering, vol. 7, no. 2, pp. 328-331, April 1995, doi:10.1109/69.382302
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