Hana studio : filter attribut in structure

Hi,

I would similar to make the caller operation for the query.

In this operation , I would similar to person a filter by attribute.

For IO "0WBS_ELEMT",for enactment X,  I would similar to marque a filter with worth 2001 for attribut 0COMP_CODE.

But, I can't adhd the property '0COMP_CODE' due to the fact that the bottommost 'Add' is not progressive and one tin restrict by attribut 

Question : however to negociate the filter with attribut of IO successful query structure

Thanks

Bastien