| 摘要 |
The invention advances the technology of virtual data warehousing: by allowing data to be organized in any of a number of virtual structures without the need for replication (FIg.1, 1 ); by allowing the data to be accessed through the virtual structure at speeds in excess of those for conventional methods (FIg.1, 3); by allowing data to be searched at significantly higher speeds, using a new indexing technology that enables tables to be indexed by data external to themselves, thus removing the need for complex joins (FIg.1, 5); and by providing a workable security model for compartmenting access to both the data and the indices used to support searching (FIg.1, 6).
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