title: Query with jsonb operator
body: <p>I'd like to make this PostgreSQL query using Npgsql 3.1.7:</p>
  
  <pre><code>SELECT jdoc FROM myTable where jdoc -&gt; 'tags' @&gt; '[{"name": "tv"}]'
  </code></pre>
  
  <p>The code looks like this:</p>
  
  <pre><code>using (var dbConnection = new NpgsqlConnection("myconnection")) {
        dbConnection.Open();
  
        var request = dbConnection.ExecuteReader("SELECT jdoc FROM myTable where jdoc -&gt; 'tags' @&gt; '[{\"name\": @var1}]'"),
                  new { var1 = "tv" });
  }
  </code></pre>
  
  <p>The jsonb operator <code>@&gt;</code> is seen as a parameter and I get this Exception:</p>
  
  <pre><code>{"22P02: invalid input syntax for type json"}
  Token "@" is invalid.
  </code></pre>
  
  <p>Is there a way to use this operator with an escape mechanism or something else?</p>