How to make ABAP understand "_" as a special character in a global variable value from BODS

Hello All,

I have one requirement in BODS to execute ABAP dataflows with dynamic global variables. The ABAP is a custom one with dynamic where clause. I am trying to send the global variable value like " Field-name like '%_%' ". But instead of fetching records with only '_', it is fetching all records from the table.

Do you have any solution for this issue.