The core principle is the Builder Pattern applied within DAX expression evaluation, where iterators generate temporary tables that must be passed to revisors like CALCULATE for modification of filter context. Theoretical components include distinct function classes: aggregation iterators which sum or average values versus filtering iterators (FILTER) which derive specific row subsets from a temp table, and revisors (CALCULATE) which apply these derived rows to the current evaluation context. This concept belongs to the domain of analytical database query optimization within Power BI, specifically illustrating how abstract expression structures translate filter definitions into temporary relational tables before final aggregation or return values are produced by parent discipline rules regarding DAX execution logic.
The core principle is the Builder Pattern applied within DAX expression evaluation, where iterators generate temporary tables that must be passed to revisors like CALCULATE for modification of filter…