title: Subtract number from enum
body: <p>My <code>number</code> column in <code>data</code> table has enum values:</p>
  
  <p><code>1, 2, 3, 4, 5, 101, 102, 103, 104, 105</code></p>
  
  <p>I want to set values of <code>number = number - 100</code> for all rows using query:</p>
  
  <p><code>UPDATE data SET data.number = (data.number - 100) WHERE data.number &gt; 100</code></p>
  
  <p>But it does not work on enum data.</p>