title: AWS Glue crawler is not creating table for fixed length text file with in-built classifier
body: <p>My data file looks like this:</p>
  
  <pre><code>123 20180522 103122103957
  123 20181004 101822106246
  123 20160316 102635100963
  123 20190605 101271101407
  123 20160816 103294105281
  123 20160820 105096101732
  123 20161001 104980103955
  
  </code></pre>
  
  <p>When I don't use any custom classifier, it is not creating any table.</p>
  
  <p>When I used custom classifier, it created the table with 21 rows detected. But the expectation is to create 7 rows with 3 columns. Can you tell me, how to fix it?</p>
  
  <pre><code>(?&lt;col0&gt;.{3})(?&lt;col1&gt;.{8})(?&lt;col2&gt;.{12})
  </code></pre>