title: BigQuery Timestamp in Select giving different format
body: <p>using BigQuery query API to retrieve data from BigQuery. for timestamp column , am getting values in different format.</p>
  <pre><code>query=&quot;select * from table&quot;
  QueryJobConfiguration queryConfig = QueryJobConfiguration
                      .newBuilder(query)
                      .setUseLegacySql(false)
                      .build();
  </code></pre>
  <p>Value in Table : <code>&quot;2022-02-25 08:47:48.801665&quot;</code>
  Value in Output : <code>1.645778868801665E9</code></p>
  <p>If I am casting to string the getting proper value. why is this happening ?
  can someone explain ?</p>