Pass Result of Customer Exit as FilterValueExt?

Dear Community,

In WAD it was possible to pass the technical name of a customer exit variable as filter value. Here the old URL command sequence:

FILTER_IOBJNM_1=RCRMINSET___F27&FILTER_COLLAPSE=&FILTER_SIGN_1=I&FILTER_VALUE_1=RAVVABLD1_CSOV_001&FILTER_VALUE_TYPE_1=VARIABLE_EXIT

Orange: Name of Info Object / Dimension

Green: Technical name of Customer Exit as Value for the filter

Blue: Type of Value

The result of the customer exit is then used in the Query. For example the Customer Exit returns the current date and subtracts 3 of the year.

When I try to set the filter by either setFilter() or setFilterExt() function of Design Studio, it does not accept the customer exit as value.

When using

     DS_1.setFilter("RCRMINSET___F27", "RAVVABLD1_CSOV_001");

I get the Warning

Using

     DS_1.setFilterExt("RCRMINSET___F27", "RAVVABLD1_CSOV_001");

I get the same warning during runtime that DS was not able to set the filter.

Is there any way to achieve this or does SAP needs to implement this in a future release?

Any help is appreciated.

Thanks a lot and best regards

Fabian