title: Filter Out NULL value via Pig
body: <p>I have table which i read via following.</p>
  
  <pre><code> A = load 'customer' using PigStorage('|');
  </code></pre>
  
  <p>In customer following are some of the row</p>
  
  <pre><code>7|Ron|ron@abc.com
  8|Rina  
  9|Don|dmes@xyz.com
  9|Don|dmes@xyz.com
  10|Maya|maya@cnn.com
  
  11|marry|mary@abc.com
  </code></pre>
  
  <p>When i use following....</p>
  
  <pre><code>B = DISTINCT A;
  A_CLEAN = FILTER B by ($0 is not null) AND ($1 is not null) AND ($2 is not null);
  </code></pre>
  
  <p>it removes 
  8|Rina as well</p>
  
  <p>How to remove null rows via Pig?</p>
  
  <p>Is there a way i can try
      A_CLEAN = filter B by not IsNULL()???</p>
  
  <p>I am new to pig so not sure what i shuld put inside IsNULL...</p>
  
  <p>Thanks</p>
  
  <p>A_CLEAN = filter B by not IsEmpty(B);</p>