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
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB