title: Get custom column(s)/field(s) with Google Adwords script
body: <p>I am currently working on a script to report information on our Ad Groups. We set up some customized columns and it would be great to get them while creating the reports.</p>
  
  <p>A basic code based on the <a href="https://developers.google.com/adwords/api/docs/appendix/reports/adgroup-performance-report#adgroupname" rel="nofollow">documentation</a> looks like this: </p>
  
  <pre><code>var report = AdWordsApp.report(
      'SELECT CampaignName, AdGroupName, MyCustomColumn ' +
      'FROM   ADGROUP_PERFORMANCE_REPORT ' +
      'WHERE  CampaignName CONTAINS "'+campaign_discriminator+'"');
  
  var rows = report.rows();
  while (rows.hasNext()) {
      var row = rows.next();
      Logger.log(JSON.stringify(row));
  }
  </code></pre>
  
  <p>However, I did not find anyway to get the custom column (<code>MyCustomColumn</code> here) in this Adwords Query Language (AWQL) request. I looked around on the web and this question seems not covered, is the answer too obvious or just impossible?</p>
  
  <p>Thank you for any useful input and questions</p>
  
  <p>Best.</p>