@pp86
Currently default form EXTEND() and GROUP() are acceptable and generate in output a copy of the input dataset. Yet, we already have an operator to copy in output an input dataset, i.e., SELECT().
Make not possible compile EXTEND() and GROUP(), requiring for each of them at least a parameter for correct compiling.
Also check that DG(N) accepts only non negative N values (as DGE(N) does)
@pp86 Currently default form EXTEND() and GROUP() are acceptable and generate in output a copy of the input dataset. Yet, we already have an operator to copy in output an input dataset, i.e., SELECT(). Make not possible compile EXTEND() and GROUP(), requiring for each of them at least a parameter for correct compiling.
Also check that DG(N) accepts only non negative N values (as DGE(N) does)