title: when migrate data from mysql to postgresql using pgloader show fell through ECASE expression
body: <p>when I using this command to migrate data from <code>mysql 5.17.1</code> to <code>postgresql 13</code> in my macOS Catalina 10.15.7:</p>
  <pre><code>pgloader mysql://root:udUS1y5Mb634ugPD@17.101.228.134:3309/common postgresql://postgres:postgres123456@postgres.dolphin.com:5432/dolphin
  </code></pre>
  <p>shows this error:</p>
  <pre><code>2021-02-02T14:35:18.015000Z LOG pgloader version &quot;3.6.2&quot;
  2021-02-02T14:35:18.017000Z LOG Data errors in '/private/tmp/pgloader/'
  KABOOM!
  FATAL error: Failed to connect to pgsql at &quot;postgres.dolphin.com&quot; (port 5432) as user &quot;postgres&quot;: 10 fell through ECASE expression. Wanted one of (0 2 3 4 5 6 7 8).
  An unhandled error condition has been signalled:
     Failed to connect to pgsql at &quot;postgres.dolphin.com&quot; (port 5432) as user &quot;postgres&quot;: 10 fell through ECASE expression. Wanted one of (0 2 3 4 5 6 7 8).
  
  
  
  
  What I am doing here?
  
  Failed to connect to pgsql at &quot;postgres.dolphin.com&quot; (port 5432) as user &quot;postgres&quot;: 10 fell through ECASE expression. Wanted one of (0 2 3 4 5 6 7 8).
  
  (base)
  </code></pre>
  <p>I read the <a href="https://github.com/dimitri/pgloader/issues/1233" rel="noreferrer">issue</a> has the same problem but still not figure out where is the problem. What should I do to fix this problem?</p>