Inspection

partition_compatibility(*args)	Check if multiple collections have compatible partitions.
PartitionCompatibility(value)	Sum type for describing partition compatibility.
report_necessary_buffers(*args[, traverse])	Determine the buffer keys necessary to compute a collection.
report_necessary_columns(*args[, traverse])	Get columns necessary to compute a collection
sample(arr[, factor, probability])	Decimate the data to a smaller number of rows.