| 摘要 |
A method executed by a plurality of processors in a database system to implement temporal aggregate queries. The database system has a temporal table. A plurality of consecutive temporal partitions are defined and allocated to the respective processors. A query is received to aggregate at least one attribute of the temporal table. In response to the query, a plurality of timestamps are identified in the temporal table, the respective timestamps are allocated to the respective temporal partitions, the value changes in the at least one attribute at the plural timestamps are computed within each partition using the respective processors to which each partition is allocated, and the value changes within each partition are aggregated using the respective processors to which each partition is allocated to produce an aggregate value for the query.
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