SYSTEMS AND METHODS FOR CONTROL REALISED BY MEANS OF ACCESS AT LEVEL OF MINOR STRUCTURAL UNITS OVER DATA STORED IN RELATIONAL DATABASES Russian patent published in 2009 - IPC G06F21/24 G06F12/14 

FIELD: information technologies.

SUBSTANCE: inventions are related to computer systems and methods for provision of protected access to database. System comprises memory device for protection descriptors, which store information about protection, related to at least one line of database, besides database contains at least one table that includes at least one line and two columns, in one of columns there is a protection descriptor stored, being related to line, information stored in protection descriptor comprises data about which type of access and to which principal is permitted or prohibited; database processor that issues response to query of database, based at least partially on information about protection stored in protection descriptor, which is assessed on the basis of information stored in database, and context of user that makes query; query component that contains optimiser of queries, which defines optimal route for response provision to query.

EFFECT: improved protection of access to database.

20 cl, 9 dwg, 2 tbl