alter entity field query to print for debug

query_alter.module

/**
 * Implements hook_query_alter().
 */
function evosys_redirect_query_alter($query) {
  if ($query->hasTag('debug')) {
    $sql = (string)$query;
    $connection = Database::getConnection();
    foreach ((array) $query->arguments() as $key => $val) {
      $quoted[$key] = $connection->quote($val);
    }
    $sql = strtr($sql, $quoted);
    dpr($sql);
    exit;
  }
}