How to get data from mongo database into saiku using apache drill

Hi, I am trying to get data from mongo database using apache drill in Saiku tool. Right now I am able to get tables from mongo using apache drill but columns (fields) are not coming in tables ( empty tables are coming ). Please help me out of this problem ASAP. Thank you

How to get mongo data into saiku using apache drill

Hi, I am trying to get data from mongo using apache drill in Saiku tool. Right now I am able to get tables from mongo using apache drill but tables are empty. For better understanding please see attached image. Please help me out of this problem ASAP. Thank you