No matter what the output data type is, the same issue of no persistent ordering of observations applies to any output results that you save to a CAS table. This also applies to any output data sets that you create from ODS tables by using the ODS OUTPUT statement. For example, some procedures produce output data sets that contain transformations of the original observations. If the output data set is written as a CAS table, you might not be able to map the transformed observations to the original observations reliably.