|
|
This operator, proposed in Pedersen, Jensen, & Dyreson (2001), computes the SQL aggregate function on a MAD, which is grouped by a set of dimension categories, by first applying the aggregate formation operator to the MAD with the given categories and the given function. Note that the categories not in the group-by clause are in the ⊺ categories of their dimensions. The dimensions not in the group-by clause are then projected out.
|
|