Query based invalidation subscription

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2011-06-14

2011-06-14

Cottingham, John R. (Department: 2167)

Data processing: database and file management or data structures

Database and file access

Post processing of search results

C707S740000, C707S784000

Reexamination Certificate

active

07962481

ABSTRACT:
A query result set is an example of a type of body of data whose content is defined by a query. Modifications to a database can change the result of a query and therefore what the content of such a body of data, such as a result set, should be. Active Queries is an approach that enables a database server to detect database changes that alter the result of a query registered for a client and to notify a client of those changes. The notifications may be sent to, for example, a cache manager responsible for maintaining coherency of a result set cache generated by the query. The notification notifies the cache manager of when and/or what changes are needed to maintain the coherency of the cache.

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