title: Mongodb input in pentaho
body: <p>I have a time field in mysql table. based on this time field I need to import data from mongodb collection.
  So in Pentaho transformations first I have a Table Input step which gets the required date.
  Next I have a mongodb input step.Here how do i filter records based on the output from previous step?</p>
  
  <p>I saw that in mongodb input query it accepts parameters only if its an environment variable or defined in another transformation, but does not recognize variable from previous step.
  How do I load from previous step, please help me I am a fresher in Pentaho and trying for this solution since a week.</p>
  
  <p>Thank you,
  Deepthi</p>