title: SpagoBI data set: use javascript to access to MongoDB data base
body: <p>Since data set in SpagoBI could be created using scripts, I need to connect, query my MongoDB data base using javascript (or Groovy). 
   I need to use scripts to be able to execute aggregation on the mongoDB data, I can't use aggregation directly on my MongoDB because my data type is String </p>
  
  <p>I dont know how to access my Database using scripts  </p>
  
  <p>Any ideas?</p>