model,object,column,category,row_count,entity_count,non_null_count,null_count,min_time,max_time,time_source
table,sensors,site,TAG,2,1,2,0,1000,2000,scan
table,sensors,room,TAG,2,1,2,0,1000,2000,scan
table,sensors,temp,FIELD,2,1,0,2,1000,2000,scan
