Whether the cube, written again as the lambda was written (a matview's
relation, or a run with no row limit), is the lambda it was read from.
Written another way, it reads the same rows only when every step was
checked as it was read: a step read with unknown columns, e.g. a select
taken for the one a Join writes, may not.
Whether the cube, written again as the lambda was written (a matview's relation, or a run with no row limit), is the lambda it was read from. Written another way, it reads the same rows only when every step was checked as it was read: a step read with unknown columns, e.g. a select taken for the one a Join writes, may not.