When adding a data set, I can use Transformations> Data Function to apply a Data Function before the data gets brought in as a data table. This is really nice when I want to reduce file size in my DXP by pre-processing my DF on the source data. However, I cannot use the asterisk (*) in "Search expression" for this transform, and must explicitly select the input columns for my DF. I would like to have my DF perform on all columns without pre-defining. This is helpful when using 'melt' to create a dynamic unpivot and I'm sure will be helpful in other scenarios as well.