Optional Date Prompt build on BEx universe

I have created a Webi report on Bex query.The report has Optional date filter in Bex side as "Date From" and "Date to".It works fine when i enter both "Date From" Field as well as "Date to" field.

The problem arises when i enter only "From Date" Date.It returns whole record.Similarly when i enter only "to Date" field and keep the "from" field as blank it returned whole record set.

While running the query on BEx environment i was able to get the correct records keeping either of the field Blank.

Is there any solution available?