title: How to update multiple rows using sqlx?
body: <p>I'd like to update multiple rows in a single query:</p>
  
  <pre><code>//threadIDs is a variable length slice of integers like [3 5 6]
  query := "UPDATE message SET recipient_deleted=? WHERE recipient_id=? AND thread_id IN ?"
  _, err := database.SQL.Exec( query, 1, userID, threadIDs)
  if err != nil {
      log.Fatal(err)
  }
  </code></pre>
  
  <p>But I get this runtime error:</p>
  
  <pre><code>sql: converting argument $3 type: unsupported type []int, a slice of int
  </code></pre>
  
  <p>How can I fix this?</p>