Ad-hoc variables in web query

Hi Friends ,

Iam new to biw , i trying to create a Query and execute the same.

When i execute the same thru Query Designer i.e web query I'm getting the initial screen to enter the "Current Calendar Day " . But in my query i have not given any selection fields.

Can any one help me to resolve this issue...

Thanks and Regards,

K Vijayasekar.