title: UDF in bigquery error
body: <p>I am running below simple UDF and I am getting "Error: 3.3 - 14.6: Javascript TVFs are disabled.". Does anyone have a clue about this?</p>
  
  <p>Query:</p>
  
  <pre><code>select * from 
  js(
  (publicdata:samples.shakespeare),
  word, word_count,
  "[{name: 'word', type:'string'},
    {name: 'add5', type:'integer'}]",
  
    "function(r, emit) {
     var new_cnt = r.word_count+5;
     emit({word: r.word, 
           add5: new_cnt});  
    }")
  </code></pre>