title: How To Query A Repeated String Field With Empty Value [] in BigQuery?
body: <p>New to the BigQuery, I have a repeated field in BigQuery, like this</p>
  <pre><code>myTable
  {
  &quot;id&quot;: 12345
  &quot;myNestedStringArrayField&quot;: []
  }
  </code></pre>
  <p>How can I query all rows with the myNestedStringArrayField value is empty?
  I tried using <code>myNestedStringArrayField is null</code>, but return no results, I know I have rows that have [] as the value. I also tried using the <code>= '[]'</code> , but the query edit throws an error.</p>
  <p>Thank you in advance.</p>