title: Superset sql query editor using parameter in where clause
body: <p>I am trying to use a parameter in where clause of a query. This query is going to run on an instance of a mysql database. This is my sample query that finds expired orders:</p>
  
  <pre><code>SELECT * FROM orders WHERE status = "expired"
  </code></pre>
  
  <p>I want the status part to be dynamically filled during visualization. When I replace it with a parameter like this:</p>
  
  <pre><code>SELECT * FROM orders WHERE status = {{ status }}
  </code></pre>
  
  <p>and define the parameter as:</p>
  
  <pre><code>{"status": "expired"}
  </code></pre>
  
  <p>I get this error:</p>
  
  <blockquote>
    <p>Unknown column 'expired' in 'where clause'</p>
  </blockquote>
  
  <p>It seems it is because of double quotation around expired.
  I can use parameters successfully outside of where clause.</p>