title: apache superset query error on datetime with timezone column
body: <p>I have a table with a column of type <code>TIMESTAMP WITH TIME ZONE</code> and I try to simply <code>SELECT * FROM table</code>, but I get this message:</p>
  <blockquote>
  <p>postgresql error: '&gt;=' not supported between instances of 'datetime.timedelta' and 'int'`</p>
  </blockquote>
  <p>Am I entering the data incorrectly?</p>
  <pre><code>creation_datetime = datetime.now(timezone.utc)
  
  ...
  
  
  new_record = {
                &quot;key&quot;: valid_value.contract.symbol.lower(),
                &quot;datetime_downloaded_from_api&quot;: creation_datetime
               }
  
  yield new_record
  
  </code></pre>
  <p>I use meltano and a singer custom TAP to retrieve and input the data.. meltano taps <code>streams.py</code> has the part where I describe the data columns and did this</p>
  <pre><code>    schema = th.PropertiesList(
          th.Property(&quot;datetime_downloaded_from_api&quot;, th.DateTimeType),
          th.Property(&quot;contract_id&quot;, th.IntegerType)
      ).to_dict()
  </code></pre>