Graduate Thesis Or Dissertation

 

An interface facility for the database management system Allegro Public Deposited

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/w0892f99n

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  • Allegro is a database management system being built at Oregon State University to provide a vehicle for ongoing research in information systems architecture. The initial Allegro system is a single user environment incorporating a limited network model database management system based on the proposals made by various CODASYL committees. This thesis describes the establishment of an interface facility for Allegro. The implementation of a CODASYL-like data manipulation language embedded in a C program is discussed. A grammar for the language is proposed, and it is shown that a parser can be easily built for this language. The advantages of mechanisms to preserve the integrity of the database and to make the database more secure are discussed. The various facilities to do this that are available on UNIX are mentioned, and the actual security features implemented in Allegro are presented. The enhancements made to Allegro lay the groundwork for expansion of the system into a multi-user, multi-database environment. A brief description of how this may be done is given.
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