Data base locking

Details Data base locking Data base locking

1986-04-29

1987-10-06

Shaw, Gareth D.

Boots, shoes, and leggings

364300, G06F 1540

Patent

active

046987525

ABSTRACT:
A data base system is disclosed in which records are locked out during record changing by using a dynamically generated directed acyclic graph of the records. The edges of the graph, stored in the records themselves, point toward a "root" record representing multiply-shared information. An application to the assignment of telephone facilities to telephone subscribers is also described. A transaction list is maintained to identify locked out records previously locked out during the same transaction.

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Cattell, G. G., "An Enity-Based Database User Interface", Proc. ACM-SIGMOD., May 14-16, 1980, pp. 144-150.
"Graphs and Hypergraphs", North Holland Company, 1973, pp. 389-413.
Chen, P., "The Enity-Relationship--Toward a Unified View of Data", ACM Trans. on Database Systems, Mar. 1976, pp. 9-36.

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