Operating system and data base having an access structure formed

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364DIG2, 364974, 3649744, 3649723, 364958, 3649581, G06F 1730

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active

055948995

ABSTRACT:
An object access system for retrieving objects in response to requests identifying requested objects, the system comprising an access structure consisting of a plurality of tables where each table is identified by a unique table identifier and has a plurality of rows where each row has a plurality of fields and is identified by a unique primary key in one of the fields and where a field may also contain objects; a row index for each table, each row index having entries ordered on the primary key of the rows in the table where each entry points to a row of fields in the table; a table index ordered on the table identifier for the tables, the table index having an entry for each table which point to the row index for that table and access means, responsive to requests for an object having an associated table identifier and primary key, for searching the table index for the requested table identifier and for retrieving from the table index entry for the requested table identifier the pointer to the row index for the requested table identifier, searching the pointed to row index for the requested primary key and retrieving from the row index entry for the requested primary key the pointer to the row of fields and searching the pointed to row of field for the requested object and retrieving the requested object.

REFERENCES:
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patent: 5133068 (1992-07-01), Crus et al.
"Table Storage Architecturee for the OS/2 Extended Edition Database Manager", IBM Technical Disclosure Bulletin, vol. 32, No. 5A, Oct. 1989, pp. 30-32.
M. Papazoglou, "An Extensible DBMS for Small and Medium Systems", IEEE Micro, vol. 9, No. 2, Apr. 1989, pp. 52-68.
A. Brown et al., "Data Base Management for HP Precision Architecture Computers", Hewlett-Packard Journal, vol. 37, No. 12, Dec. 1986, pp. 33-48.
D. J. Haderle et al., "IBM Database 2 Overview", IBM Systems Journal, vol. 23, No. 2, 1984, pp. 112-125.

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