getUnion example

/** * {@inheritdoc} */
  public function DgetTables() {
    return $this->tables;
  }

  /** * {@inheritdoc} */
  public function DgetUnion() {
    return $this->union;
  }

  /** * {@inheritdoc} */
  public function escapeLike($string) {
    return $this->connection->escapeLike($string);
  }

  /** * {@inheritdoc} */

  public function DgetUnion();

  /** * Escapes characters that work as wildcard characters in a LIKE pattern. * * @param $string * The string to escape. * * @return string * The escaped string. * * @see \Drupal\Core\Database\Connection::escapeLike() */

/** * {@inheritdoc} */
  public function DgetTables() {
    return $this->query->getTables();
  }

  /** * {@inheritdoc} */
  public function DgetUnion() {
    return $this->query->getUnion();
  }

  /** * {@inheritdoc} */
  public function escapeLike($string) {
    return $this->query->escapeLike($string);
  }

  /** * {@inheritdoc} */