Method and system for implementing an enhanced database

摘要

A method for storing a snapshot of data in a database, comprising: creating a root indirection set for the snapshot of data; maintaining a deleted pattern in the database, wherein the deleted pattern is not removed from a pattern set for a node in a table of the database when the pattern is deleted in the database; and providing access to the snapshot of data using the created root indirection set, the created root indirection set accessing the deleted pattern.