| 摘要 |
A method, apparatus, and article of manufacture for a multiple index combination system. A query is executed to access data stored on a data storage device connected to a computer. In particular, while accessing one or more single column indexes to retrieve partition invariant designators, multiple bit maps are generated and populated. As directed by the query predicate, the bit maps are combined into a single, global bit map. The global bit map directs the retrieval process to the required rows.
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