title: Pentaho Job - Execute job based on condition
body: <p>I have a pentaho job that is scheduled to run every week and gets data from one table and populates in another.  </p>
  
  <p>Now the job executes every week irrespective of whether the source table was updated or not.  </p>
  
  <p>I want to put a condition before the job runs to see if the source was updated last week or not and run the job only if the source was updated else dont run the job.  </p>