Exponential Lower Bounds and Separation for Query Rewriting
Exponential Lower Bounds and Separation for Query Rewriting
复制标题
查询重写的指数下界和分离
DOI:
10.1007/978-3-642-31585-5_26
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发表时间:
2012
期刊:
影响因子:
--
通讯作者:
M. Zakharyaschev
中科院分区:
文献类型:
--
作者:
S. Kikot;R. Kontchakov;V. Podolskii;M. Zakharyaschev
We establish connections between the size of circuits and formulas computing monotone Boolean functions and the size of first-order and nonrecursive Datalog rewritings for conjunctive queries over OWL 2 QL ontologies. We use known lower bounds and separation results from circuit complexity to prove similar results for the size of rewritings that do not use non-signature constants. For example, we show that, in the worst case, positive existential and nonrecursive Datalog rewritings are exponentially longer than the original queries; nonrecursive Datalog rewritings are in general exponentially more succinct than positive existential rewritings; while first-order rewritings can be superpolynomially more succinct than positive existential rewritings.
DOI:
--
发表时间:
2012
期刊:
Thirteenth International Conference on Principles of Knowledge Representation and Reasoning, KR 2012, Rome, Italy, June 10-14, 2012
影响因子:
--
作者:
Kikot S
通讯作者:
Kikot S
影响因子:
2.5
作者:
Benedikt M
通讯作者:
Benedikt M