Storage and Access Structures to Support a Semantic Data Model
نویسندگان
چکیده
This paper describes the design of storage and access structures for a high performance Ada* compatible database management system. This system supports the database application programming language ADAPLEX ISmith81, Smith821, which is the result of embedding the database DAPLEX [ Shipman 1 sublanguage in the general purpose language Ada [DoD80 1. A prominent feature of the underlying data model is its support for generalization hierarchies [Smith771 which are intended to simplify the mapping from conceptual entities to database objects. An in-depth discussion of the rationale behind our choice of storage and access structures to support semantics intrinsic to the data model and to permit physical database organization tuning is provided in this paper.
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