The complexity of higher-order queries
The complexity of higher-order queries
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高阶查询的复杂度
DOI:
10.1016/j.ic.2015.07.003
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发表时间:
2015
影响因子:
1
通讯作者:
Benedikt M
中科院分区:
文献类型:
--
作者:
Benedikt M
Higher-order transformations are ubiquitous within data management. In relational databases, higher-order queries appear in numerous aspects including query rewriting and query specification. This work investigates languages that combine higher-order transformations with ordinary relational database query languages. We study the two most basic computational problems associated with these query languages – the evaluation problem and the containment problem. We isolate the complexity of evaluation at every order, in an analysis similar to that for that standard typed lambda calculus. We show that the containment problem (and hence, the equivalence problem) is decidable in several important subcases, particularly in the case where query constants and variables range over the positive relational operators. The main decidability result relies on techniques that differ from those used in classical query containment. We also show that the analysis of higher-order queries is closely connected to the evaluation and containment problems for non-recursive Datalog.
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影响因子:
4.8
作者:
Henrik Björklund;W. Martens;T. Schwentick
通讯作者:
T. Schwentick
影响因子:
1.1
作者:
J. V. D. Bussche;D. V. Gucht;Stijn Vansummeren
通讯作者:
Stijn Vansummeren
DOI:
--
发表时间:
1994
期刊:
ACM SIGACT-SIGMOD-SIGART Symposium on Principles of Database Systems
影响因子:
--
作者:
Gerd G. Hillebrand;P. Kanellakis
通讯作者:
P. Kanellakis
DOI:
--
发表时间:
2011
期刊:
International Conference on Database Theory
影响因子:
--
作者:
Huy Vu;Michael Benedikt
通讯作者:
Michael Benedikt
DOI:
--
发表时间:
1996
期刊:
Proceedings 11th Annual IEEE Symposium on Logic in Computer Science
影响因子:
--
作者:
Gerd G. Hillebrand;P. Kanellakis
通讯作者:
P. Kanellakis