Efficient groupby aggregation in tournament tree sort
A method, apparatus, and article of manufacture for a computer implemented groupby aggregation system. Groupby aggregation is performed when a statement is executed in a database stored on a data storage device, which is connected to a computer. Initially, data elements are input into a tournament t...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | A method, apparatus, and article of manufacture for a computer implemented groupby aggregation system. Groupby aggregation is performed when a statement is executed in a database stored on a data storage device, which is connected to a computer. Initially, data elements are input into a tournament tree from an input sequence. Then, a winner of a tournament in the tournament tree is identified. The winner is recycled into the tournament tree. |
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