An extensible rule-based language with complex objects and data-functions

Authors:
Serge Abiteboul;Stephane Grumbach;Agnès Voisard;Emmanuel Waller
Affiliations:
-;-;-;-
Venue:
Proceedings of the second international workshop on Database programming languages
Year:
1989

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Object identity as a query language primitive

SIGMOD '89 Proceedings of the 1989 ACM SIGMOD international conference on Management of data
Object identity as a query language primitive

Journal of the ACM (JACM)

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Abstract

A rule-based database language for complex objects is studied. An algebraic evaluation of rules based on range-restriction conditions is presented. The inference of variable types is considered. The language is extended using external functions and predicates that are defined in a host programming language. The impact of this extension on the power of the language is investigated. Finally, a toy implementation of the language and future extensions are described.