title: MySQL 5.7 JSON automatically formats time
body: <p>Does anyone know why the function JSON_OBJECT formats TIME-data automatically?
  When I do the following:</p>
  
  <pre><code>SELECT
          JSON_OBJECT(
              'Time_Transformed', TIME('11:42:00')
          ) AS myJson,
          TIME('11:42:00') AS `Time_Raw`
  </code></pre>
  
  <p>The result is:</p>
  
  <pre><code>myJson: {"Time_Transformed": "11:42:00.000000"}
  Time_Raw: 11:42:00
  </code></pre>