Access concurrency for cached authorization information in...

Details Access concurrency for cached authorization information in... Access concurrency for cached authorization information in...

G - Physics

06

F

G06F 17/30 (2006.01) G06F 12/02 (2006.01)

Patent

CA 2384259

A method and system for permitting concurrent access to cached authorization information for an SQL database system. The authorization information is cached as consolidated bitmaps. A first, authorization, bitmap in the cache represents committed authorization information for a grantee and type of grantee. A second, cumulative delta, bitmap in each cache entry represents authorization information not yet committed. A cache entry state is recorded for each cache entry. Access to the cumulative delta bitmap is provided where the database agent requesting access is the agent carrying out a modification to the cached authorization information. Access to the authorization bitmap information is permitted, amongst other conditions, where a grant statement is uncommitted and the database agent requesting access is not seeking to modify the authorization

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