Amdp internal table structure

Hello,

Is it possible to pass dynamic internal tables to amdp? My requirement is to pick 6 fields from the internal table.The 6 fields will be constant but the structure of the internal table can vary based on user selection i.e it can have 20 fields in one case and 15 the next time.I am not able to define an internal table with type any in amdp.I guess we need to use a table type only but am not sure how to declare in this case.

Thanks,

Prem