ReadonlyletsWhat each let binds, by name, read where the relation reads it (window isolation, PLAN §8.6)
ReadonlylimitWhether a limit stood beside from(): the grid's row limit in a lambda
Cube ran (the Runs panel's Pure), or the user's own, which can't be told
apart, so it is read as a Limit step
ReadonlyrelationThe relation the steps are read from, with a run's sort and limit as they were applied
Optional ReadonlyruntimeThe runtime from() names, when the lambda runs with one
The parts of a lambda Cube reads into a cube (PLAN §11.18): the relation whose steps are read, the lets it reads, and, for a run's lambda, the run's own parts. A matview's lambda is its relation alone.