title: How to filter records with a null value in PIG?
body: <p>I am trying to drop records that contain at least one null in any of the fields. For example, if the data has 3 fields, then:</p>
  
  <pre><code>filtered = FILTER data by ($0 is not null) AND ($1 is not null) AND ($2 is not null)
  </code></pre>
  
  <p>Is there any cleaner way to do this, without having to write out 3 boolean expressions?</p>