By Gabriel Kuper, Leonid Libkin, Jan Paredaens
This e-book is the 1st complete survey of the sector of constraint databases. Constraint databases are a reasonably new and lively quarter of database learn. the main thought is that constraints, similar to linear or polynomial equations, are used to symbolize huge, or maybe limitless, units in a compact approach. the facility to accommodate countless units makes constraint databases fairly promising as a know-how for integrating spatial and temporal info with average re lational databases. Constraint databases deliver thoughts from various fields, comparable to common sense and version conception, algebraic and computational geometry, in addition to symbolic computation, to the layout and research of information types and question languages. The publication is a collaborative attempt concerning many authors who've con tributed chapters on their fields of craftsmanship. regardless of this, the publication is designed to be learn as a complete, in preference to a suite of person surveys. In par ticular, the terminology and the fashion of presentation were standardized, and there are a number of cross-references among the chapters. the belief of constraint databases is going again to the past due Paris Kanellakis.
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Extra info for Constraint Databases
A further proposal in the same direction is described in (HHLvEB89]. The motivation of this paper was to include domaindependent information in databases, using as a motivating example Ohm's law in a database of electric components. Ohm's law is essentially stored as an infinite (finitely represented) relation, and then queried as though it was a normal relational database (but the issue of finite representation of the results is not addressed). There was also previous work on other data models in which compact representations of data are stored, and queries return some finite representation of a potentially infinite result.
3. Structure M is said to admit quantifier elimination if for every first-order formula
Constraint Databases by Gabriel Kuper, Leonid Libkin, Jan Paredaens