International Business Machines Corporation

Michael A F Stuy

Paul Miller Bird

A method and system for improving access concurrency to information stored in at least one table in a relational database system is disclosed. The method comprises providing a data cache, which stores a portion of the at least one table. The data cache includes a plurality of cache entries, wherein each cache entry comprises a first data item, a second data item, and a cache entry state. The method further comprises retrieving from the at least one table and storing in a cache entry's first data item a representation of committed information for a user, and retrieving from the at least one table and storing in the cache entry's second data item a representation of changes applied to the committed information, but not yet committed in the database system.

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Unionville, Canada

Michael A F Stuy