Checks whether a Flake is an aggregate transform stage.
True for a computed node whose leading pipe transform
aggregates a group (qest's isAggregate), such as a count or
sum. Aggregate stages drive grouped query semantics: the non-aggregate projections become the grouping keys, and
constraints on aggregates filter groups rather than items. The test is local to the node and ignores aggregate
stages nested beneath it; isGroupingFlake checks the projections across the whole tree.
Checks whether a Flake is an aggregate transform stage.
True for a computed node whose leading pipe transform aggregates a group (
qest's isAggregate), such as a count or sum. Aggregate stages drive grouped query semantics: the non-aggregate projections become the grouping keys, and constraints on aggregates filter groups rather than items. The test is local to the node and ignores aggregate stages nested beneath it; isGroupingFlake checks the projections across the whole tree.