Hardware implementation of the aggregation/group by operation: filter method

摘要: Techniques are described for performing grouping and aggregation operations. In an embodiment, a request is received to aggregate data grouped by first column. response receiving the request, values loaded from column into input cache. The include values, column, set of rows. A filter unit programmed with logic perform comparison between particular value, row, in plurality rows, Based on comparison, predicate result generated that identifies within have valued matches value. An value second aggregating each rows identified result.